CN107732900A - A kind of ship connects bank electricity method and system - Google Patents

A kind of ship connects bank electricity method and system Download PDF

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Publication number
CN107732900A
CN107732900A CN201710890705.9A CN201710890705A CN107732900A CN 107732900 A CN107732900 A CN 107732900A CN 201710890705 A CN201710890705 A CN 201710890705A CN 107732900 A CN107732900 A CN 107732900A
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China
Prior art keywords
ship
electricity
bank electricity
bank
switch
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CN201710890705.9A
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CN107732900B (en
Inventor
肖乐明
韩佳
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Guangzhou Maritime University
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Guangzhou Da Lai Jia Mdt Infotech Ltd
Guangzhou Maritime University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

A kind of ship connects bank electricity method, comprises the following steps：Whether inquiry has the ship information input that request connects bank electricity, and following steps are performed if having：According to transformer information on ship, whether ship is judged equipped with transformer on the ship that horizontal high voltage goes on board is entered, if so, then selection connects high voltage shore power, if it is not, then selection connects low pressure bank electricity；If selection connects low pressure bank electricity, according to ship power distribution information, judge whether ship power distribution standard and bank electricity electricity standard are consistent, if so, then selection is powered with pressure with frequency, if it is not, then selecting variable voltage variable frequency power supply；According to ship without bank electricity interface message is sewed up, judge whether ship has without bank electricity interface is sewed up, if so, then selection is without bank electricity is sewed up, if it is not, then selection power-off connects bank electricity.The present invention can according to ship whether equipped with transformer on ship, whether equipped with without sew up bank electricity interface, ship power distribution standard ship information, accurate judgement ship connects bank electricity using which kind of mode, greatly improves the efficiency that ship connects bank electricity.

Description

A kind of ship connects bank electricity method and system
Technical field
The present invention relates to a kind of ship multiplexe electric technology field, more particularly to a kind of ship to connect the method and system of bank electricity.
Background technology
Ship shore electric technology refers to the power network of ship access quay side during reach port, from power supply on the bank obtain its water pump, Electric power needed for communication, ventilation, illumination and other facilities, so as to close the diesel-driven generator of itself.Ship can have after connecing bank electricity Effect ground reduces the discharge of waste gas, has the remarkable advantage of energy-conserving and environment-protective, can reduce noise pollution caused by generating set operation, drop Low cost, therefore, government and its all uses of implementation bank electricity energetically of traffic department, shipping enterprise, port enterprise.
But most power supply on the bank is 400V/50Hz electricity systems, and existing ship electricity is formed with a variety of various criterions, example Made such as 460V/60Hz electricity is made, 400V/50Hz is electric, or stationary transformer is installed on ship, can be by the high-tension electricity of 6.6kV on the bank It is connected with ship, the mode that 460V low tension is powered again, this mode is converted to using the stationary transformer on ship Commonly referred to as high pressure is gone on board, it is necessary to be furnished with transformer on ship.In addition, the interface of ship electricity differs, some ships are provided with nothing and sewed up Bank electricity interface, seamless switching can be carried out between ship electricity and bank electricity, i.e., in the case of continuous ship electricity, directly by marine generator Power switching is powered for bank electricity, and other ship is not provided with nothing and sews up bank electricity interface, it is necessary to which the electricity that first brings to connects bank electricity again.Ship Needing to select between a variety of different power supply modes when the different situations of oceangoing ship often lead to connect bank electricity, the comparison that operates is chaotic, Can not unified allocation of resources, greatly reduce the efficiency that ship connects bank electricity.
The content of the invention
Based on this, it is an object of the present invention to provide a kind of ship of efficiency high to connect bank electricity method and system.
The technical solution adopted in the present invention is：
A kind of ship connects bank electricity method, comprises the following steps：
Whether inquiry has the ship information input that request connects bank electricity, and the ship information includes ship without sewing up bank electricity interface Transformer information and ship power distribution information in information, ship, if continuing whether inquiry has ship information input without if, performed if having Following steps：
According to transformer information on ship, whether ship is judged equipped with transformer on the ship that horizontal high voltage goes on board is entered, if so, then Selection connects high voltage shore power, if it is not, then selection connects low pressure bank electricity；
If selection connects low pressure bank electricity, according to ship power distribution information, judge whether are ship power distribution standard and bank electricity electricity standard Unanimously, if so, then selection is with pressing same frequency to power, if it is not, then selecting variable voltage variable frequency to power；
According to ship without bank electricity interface message is sewed up, judge whether ship has without bank electricity interface is sewed up, if so, then selecting Without bank electricity is sewed up, if it is not, then selection power-off connects bank electricity.
The ship of the present invention connects bank electricity method, can according to ship whether equipped with transformer on ship, whether equipped with nothing Bank electricity interface, the ship information of ship power distribution standard are sewed up, accurate judgement ship connects bank electricity using which kind of mode, greatly improves ship Oceangoing ship connects the efficiency of bank electricity.
Further, the ship information also includes marine main engine information；The ship connects bank electricity method also including following Step：
If simultaneous selection, with frequency power supply and without bank electricity is sewed up, according to marine main engine information, judges whether ship belongs to pressure In the large ship that main frame rated power is 3000 kilowatts or more, if so, then selection state follows smooth-switching method to connect bank Electricity, if it is not, then selection connects bank electricity based on voltage difference Envelope method；
If simultaneous selection variable voltage variable frequency is powered and without bank electricity is sewed up, the state of selection follows smooth-switching method to connect bank electricity.
A variety of power supply modes are provided for the different ships with electric standard, the state provided follows smooth-switching method and base In voltage difference Envelope method, ship electricity and the seamless switching of bank electricity can be realized, equipment on board is without power-off and restarts, and simplifies and supplies It is electrically operated, improve Supply Security.
Further, if selection connects bank electricity based on voltage difference Envelope method, after ship pulls in shore, following walk is performed Suddenly：
By the accurate frequency table surveying vessel electricity frequency being arranged on ship power distribution device, and manually or automatically regulation is started Machine oil door, to adjust ship electricity frequency, make ship electricity frequency lower 0.1Hz-0.5Hz than bank electricity frequency；
After the voltage difference envelope signal of ship electricity and bank electricity is obtained, periodically positive fluctuating signal is converted into；
The point on the basis of the minimum point of the periodically positive fluctuating signal, T time is respectively taken before and after the datum mark, and will The 2T times are set as docking time section, wherein 0≤T≤0.01s；
Current time is judged whether in the docking time section, if then docking ship electricity and bank electricity.
Compared to prior art, the present invention obtains voltage by surveying vessel electricity and the voltage difference envelope signal of bank electricity The minimum point of poor envelope signal, and docking time section is set according to the minimum point, the letter that closes a floodgate is sent in the docking time section Number, in the case of continuous ship electricity, bank electricity and the slitless connection of ship electricity are realized, effectively prevents circulation when ship electricity is connected with bank electricity Damage caused by the generator of potential device, ship to bank electricity, ship equipment, it is ensured that bank electricity, marine generator and ship The normal operation of equipment.
Further, if selection state follows smooth-switching method to connect bank electricity, after ship pulls in shore, following walk is performed Suddenly：
Bank electricity transformer, rectification adverser are electrically connected with shore electric power, ship electricity respectively, selected according to ship power distribution information 50Hz or 60Hz circuits；
Inner ring control method and outer loop control method are used to rectification adverser, wherein, outer loop control method is controlled using V/f Method processed, the target frequency of bank electricity transformer output is converted to by the target frequency of marine generator；Meanwhile use phaselocked loop control The frequency and voltage of method control rectification adverser output processed；
The outer loop control method of rectification adverser is converted into P/Q control methods by V/f control methods, control ship generates electricity Unit frequency and voltage, using ship electricity real time load power as target power, power transfer is carried out, increases rectification adverser power output Add, marine generator power output declines；Meanwhile the frequency and electricity exported using phase locking loop controlling method control rectification adverser Pressure；
When marine generator power output drops to predetermined power, marine generator is closed.
The state of the present invention follows smooth-switching method, and in bank electricity and ship electricity power switching, equipment on board need not power off, Following frequency f is controlled by V/f, then is controlled by P/Q and is transferred to bearing power in bank electricity from marine generator, is completed seamless Switching；In addition, bank electricity 50Hz power supplys can be realized, 60Hz or the different power network standards of two kinds of 50Hz ship are powered, fitted The needs of different ships are answered, when carrying out 50Hz ships without bank electricity is sewed up, without with traditional synchronous meter or Current limited Control, But use 60Hz rectification adversers as 50Hz is seamless and smoothly connect bank electricity transition apparatus, after the completion of switching, closing commutation inversion Device, it is transformed into bank electricity transformer from 50Hz inversions power supply and directly powers, realize the smooth connection of non-impact current.
A kind of ship connects bank electricity system, including communication module and judge module on the bank；
The communication module on the bank is used to inquire about the ship information input for whether having request to connect bank electricity, if so, then by ship Information transmission, if nothing, continues whether inquiry has ship information input to judge module；It is seamless that the ship information includes ship Connect bank electricity interface message, transformer information and ship power distribution information on ship；
The judge module is used for：
According to transformer information on ship, whether ship is judged equipped with transformer on the ship that horizontal high voltage goes on board is entered, if so, then Selection connects high voltage shore power, if it is not, then selection connects low pressure bank electricity；
If being judged as connecing low pressure bank electricity, according to ship power distribution information, judge that ship power distribution standard is with bank electricity electricity standard It is no consistent, if so, then selection is powered with pressure with frequency, if it is not, then selecting variable voltage variable frequency power supply；
According to ship without bank electricity interface message is sewed up, judge whether ship has without bank electricity interface is sewed up, if so, then selecting Without bank electricity is sewed up, if it is not, then selection power-off connects bank electricity.
The ship of the present invention connects bank electricity system, can according to ship whether equipped with transformer on ship, whether equipped with nothing Bank electricity interface, the ship information of ship power distribution standard are sewed up, accurate judgement ship connects bank electricity using which kind of mode, greatly improves ship Oceangoing ship connects the efficiency of bank electricity.
Further, the ship information also includes marine main engine information；The judge module is additionally operable to, and works as simultaneous selection During with pressure with frequency power supply and without bank electricity is sewed up, then according to marine main engine information, judge whether ship belongs to main frame rated power and be 3000 kilowatts or more of large ship, if so, then selection state follows smooth-switching method to connect bank electricity, if it is not, then selecting base Bank electricity is connect in voltage difference Envelope method；When the power supply of simultaneous selection variable voltage variable frequency and nothing sew up bank electricity, then state is selected to follow Smooth-switching method connects bank electricity.
A variety of power supply modes are provided for the different ships with electric standard, the state provided follows smooth-switching method and base In voltage difference Envelope method, ship electricity and the seamless switching of bank electricity can be realized, equipment on board is without power-off and restarts, and simplifies and supplies It is electrically operated, improve Supply Security.
Further, in addition to central processing module, the first power supply module；The central processing module receives judge module Selection result, if selection based on voltage difference Envelope method connects bank electricity, notify the first power supply module；
First power supply module includes bank electricity transformer, first switch, voltage difference envelope line detector, control assembly And second switch；
The bank electricity transformer accesses ship electricity via the first switch；The voltage difference envelope line detector with it is described First switch is connected in parallel, and the voltage difference envelope signal between the bank electricity of acquisition and ship electricity is converted into periodically positive arteries and veins After dynamic signal, the control assembly is sent to；The control assembly respectively with the voltage difference envelope line detector and first Switch connection；Control assembly point on the basis of the minimum point of the periodically positive fluctuating signal, before and after the datum mark Respectively take T time, and the 2T times are set as docking time section, and send in the docking time section switching signal to described the One switch, controls the first switch to close a floodgate；Wherein 0≤T≤0.01s；
The second switch is used to control whether to access voltage difference envelope line detector；The first switch, which is provided with, to be used for First group of contact point with ship electrical connection and second group of contact point for being connected with bank electricity transformer；The voltage difference envelope First group of input of detection means is connected with first group of contact point；Second group of the voltage difference envelope line detector Input is connected by the second switch with second group of contact point.
Compared to prior art, the present invention obtains voltage by surveying vessel electricity and the voltage difference envelope signal of bank electricity The minimum point of poor envelope signal, and docking time section is set according to the minimum point, the letter that closes a floodgate is sent in the docking time section Number, in the case of continuous ship electricity, bank electricity and the slitless connection of ship electricity are realized, effectively prevents circulation when ship electricity is connected with bank electricity Damage caused by the generator of potential device, ship to bank electricity, ship equipment, it is ensured that bank electricity, marine generator and ship The normal operation of equipment.When needing to detect the voltage difference envelope signal of ship electricity and bank electricity, the second switch (K3) is closed Lock, voltage difference envelope line detector is accessed into ship electricity and bank electricity is detected, the voltage of ship electricity and bank electricity need not detected During poor envelope signal, the second switch (K3), off voltage difference envelope line detector and ship electricity and the company of bank electricity are opened Connect, can prevent ship electricity and bank electricity spread of voltage from being damaged to caused by voltage difference envelope line detector.
Further, first power supply module also includes the first phase sequence switch and the second phase sequence switch in parallel；Ship electricity A phase, B phase, C phase respectively by the way that the first phase sequence switchs, first switch is connected with the output end U phases, V phases, W of bank electricity transformer Connect；The control assembly also includes detection device for phase sequence；Described detection device for phase sequence one end respectively with ship electricity A phase, B phase, C phase Connection, the other end is connected with the output end U phases, V phases, W of bank electricity transformer respectively, with detect ship electricity and bank electricity whether phase sequence one Cause：If phase sequence is consistent, the first phase sequence switch is closed；If phase sequence is inconsistent, the second phase sequence switch is closed；
The voltage difference envelope line detector includes voltage difference and obtains circuit, absolute value change-over circuit and shaping detection electricity Road；Two inputs that the voltage difference obtains circuit are connected in parallel on the both ends of the first switch respectively, and obtain ship electricity and bank electricity Voltage difference envelope signal；The voltage difference obtains the output end of circuit and connected with the input of the absolute value change-over circuit Connect, and the voltage difference envelope signal is sent to the absolute value change-over circuit；The output end of the absolute value change-over circuit It is connected with the input of the shaping detecting circuit, and voltage difference envelope signal is converted into forward voltage difference envelope signal Afterwards, it is sent to the shaping detecting circuit；The shaping detecting circuit carries out detection processing to voltage difference envelope signal, and turns After being changed to periodically positive fluctuating signal, the control assembly is sent to；
The control assembly includes single-chip microcomputer and industrial computer；The input of the single-chip microcomputer and the voltage difference envelope The output end connection of line detector, and the positive fluctuating signal of the periodicity is sampled and filtered, and with this periodically just Point setting docking time section, sends in the docking time section to the industrial computer on the basis of to the minimum point of fluctuating signal Dock signal；The industrial computer sends energization control signal to the first switch according to the docking signal, and described first Switch receives the energization control signal and closed a floodgate；
The voltage difference, which obtains circuit, includes one group of Hall voltage sensor component；The Hall voltage sensor component bag Include the first divider resistance, the second divider resistance, the first Hall voltage sensor and the first measurement resistance；First Hall voltage The first input end of sensor is connected by first divider resistance with the first make contact of the first switch；Described first Second input of Hall voltage sensor is connected by second divider resistance with the second contact point of the second switch, And first Hall voltage sensor obtains a phase of ship electricity by the first input end and second input respectively Voltage and bank electricity one phase voltage corresponding with the phase voltage of ship electricity, and then obtain phase ship electricity and the voltage difference bag of bank electricity Winding thread signal；The output end of first Hall voltage sensor is connected with the input of the absolute value change-over circuit, and is led to Cross the first measurement resistance eutral grounding；
First power supply module also includes the accurate frequency table being arranged on ship power distribution device, the accurate frequency table For surveying vessel electricity frequency, and the ship electricity frequency measured according to the accurate frequency table, engine throttle is manually or automatically adjusted, To adjust ship electricity frequency, make ship electricity frequency lower 0.1Hz-0.5Hz than bank electricity frequency, then enter the docking of navigate electricity and bank electricity.
Simple switching, can detect voltage difference envelope by the first phase sequence switch (K1) and the second phase sequence switch (K4) The device ship electricity consistent with phase sequence and bank electricity quickly connect；By obtaining the voltage difference envelope signal of ship electricity and bank electricity, and will The voltage difference envelope signal is changed and Shape correction, to obtain periodic signal stably；Electricity is received by single-chip microcomputer The stably voltage difference envelope signal of pressure difference envelope line detector transmission, rapidly and accurately to obtain docking time section；Again Sent by industrial computer to first switch (K2) and open a sluice gate signal, to improve the response speed of whole system；The of the present invention The ship electricity and two different voltage signals of bank electricity that one Hall voltage sensor is inputted by two inputs, in the work of Lorentz force Electromagnetic field is produced with lower, so as to quick obtaining ship electricity and the voltage difference envelope signal of bank electricity；By setting accurate frequency table, To ensure that the bearing power that generator undertakes is up to 100%, minimum to reach -30%, perfect condition is 50% or so.Prevent Bank electricity inverse probability is too high, generator jitter conditions occurs, causes generator lockage to trip；And reverse-power in the generator is too high, can make Generator automatic trip, during this, it is also possible to the impact of load is brought to bank electricity, bank electricity lockage is there is also when serious Tripping operation.
Further, in addition to central processing module, the first power supply module；The central processing module receives judge module Selection result, if selection state follow smooth-switching method to connect bank electricity, notify the second power supply module；
Second power supply module include bank electricity transformer, rectification adverser, 50Hz circuits, 60Hz circuits, common line, Interior ring controller and outer ring controller, the outer ring controller include V/f controllers, P/Q controllers and pll controller；
The bank electricity transformer, rectification adverser, 50Hz circuits, common line are sequentially connected, and bank electricity transformer, rectification are inverse Become device, 60Hz circuits and common line to be sequentially connected, 50Hz the or 60Hz circuits select according to the ship electricity power distribution information；Bank The piezoelectric transformer other end is used to be connected with shore electric power, and the common line other end is used to electrically connect with ship；
The V/f controllers, the target frequency for making marine generator are converted to the target frequency of bank electricity transformer output Rate；
The P/Q controllers, for after V/f controllers are disposed, marine generator frequency and voltage being controlled, with ship Electric Real-time Load power is target power, carries out power transfer, the increase of rectification adverser power output, marine generator output work Rate decline, when marine generator power output drop to predetermined power or it is following when, marine generator close；
The pll controller is used for frequency and the voltage for controlling rectification adverser to export.
The second power supply module of the present invention follows smooth-switching method by using state, in bank electricity and ship electricity power switching When, equipment on board controls following frequency f without power-off, by V/f, then by P/Q controls by bearing power from marine generator It is transferred in bank electricity, completes seamless switching；In addition, bank electricity 50Hz power supplys can be realized, to two kinds of different power networks of 60Hz or 50Hz The ship of standard is powered, and adapts to the needs of different ships, when carrying out 50Hz ships without bank electricity is sewed up, without with tradition Synchronous meter or Current limited Control, but use 60Hz rectification adversers as 50Hz is seamless and smoothly connect bank electricity transition apparatus, cut After the completion of changing, rectification adverser is closed, being transformed into bank electricity transformer from 50Hz inversions power supply directly powers, and realizes non-impact current Smooth connection.
Further, the 50Hz circuits include the 6th switch, the 7th switch, the first inductance, the second inductance, the 4th inductance With the first electric capacity；The 60Hz circuits include the 8th switch, the 3rd inductance, the 5th inductance and the second electric capacity；The common line Including the 4th resistance, the 6th inductance and the 9th switch；
One end of bank electricity transformer is used to connect shore electric power, one end of another termination rectification adverser and the 6th switch, The other end of rectification adverser connects one end of the 7th switch and the 8th switch respectively；The other end of 6th switch concatenates the first inductance The other end of the switch of connection the 7th afterwards, the other end of the 7th switch connect the first connection end of the second inductance, the second inductance Second connection end is sequentially connected in series one end of the 4th inductance, the 4th resistance, the 6th inductance and the 9th switch, and one end of the first electric capacity connects It is connected between the second inductance and the 4th inductance, its other end ground connection；The other end of 8th switch connects the first company of the 3rd inductance End is connect, the second connection end of the 3rd inductance is sequentially connected in series one end of the 5th inductance, the 4th resistance, the 6th inductance and the 9th switch, One end of second electric capacity is connected between the 3rd inductance and the 5th inductance, its other end ground connection；The other end of 9th switch is used for Electrically connected with ship；
The predetermined power is 5% marine generator rated power.
In order to more fully understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Brief description of the drawings
Fig. 1 is that the ship of the embodiment of the present invention one connects the schematic diagram of bank electricity system；
Fig. 2 is the schematic diagram based on voltage difference Envelope method of the embodiment of the present invention one；
Fig. 3 is the signal principle figure based on voltage difference Envelope method of the embodiment of the present invention one；
Fig. 4 is the ship electricity of the embodiment of the present invention one and the voltage difference envelope signal schematic diagram of bank electricity；
Fig. 5 is the circuit diagram of the Hall voltage sensor component of the embodiment of the present invention one；
Fig. 6 is the three groups of output waveform figures measured during the Hall voltage sensor zero load of the embodiment of the present invention one；
Fig. 7 is that the Hall voltage sensor of the embodiment of the present invention one accesses ship electricity and the output waveform figure of bank electricity；
Fig. 8 is the circuit diagram of the absolute value change-over circuit of the embodiment of the present invention one；
Fig. 9 is the output waveform figure of the absolute value change-over circuit of the embodiment of the present invention one；
Figure 10 is the circuit diagram of the shaping detecting circuit of the embodiment of the present invention one；
Figure 11 is the output waveform and voltage difference envelope comparison diagram of the shaping detecting circuit of the embodiment of the present invention one；
Figure 12 is the oscillogram that the single-chip microcomputer of the embodiment of the present invention one exports；
Figure 13 is that the state of the embodiment of the present invention one follows the schematic diagram of smooth-switching method；
Figure 14 is the circuit diagram of the voltage difference envelope line detector of the embodiment of the present invention two.
Embodiment
Embodiment one
Referring to Fig. 1, it connects the schematic diagram of bank electricity system for the ship of the embodiment of the present invention one.The ship of the present invention connects bank Electric system includes communication module, judge module, central processing module, the first power supply module, the second power supply module, the 3rd on the bank and supplied Electric module, the 4th power supply module, detection module and accounting module.Detection module include frequency detection module, voltage detection module, Current detection module and phase detecting module.In the present embodiment, shore electric power can provide following two supply standards, 400V/ 50Hz and 6.6kV/60Hz.
The ship of the present invention connects bank electricity method, comprises the following steps：
Step 1：Whether communication module inquiry on the bank has the ship information input that request connects bank electricity, and the ship information includes Ship without sew up bank electricity interface message, transformer information, ship power distribution information, marine main engine information on ship, and ship name, The ship relevant informations such as ship model, Ship Types, time of pulling in shore, continue whether inquiry has ship information input if nothing, if There is then execution step 12.
The ship information is sent to communication module on the bank by ship, can be transmitted, had by wired or wireless mode The mode of line needs to electrically connect with communication module on the bank after ship pulls in shore, and wireless mode before ship pulls in shore or can pull in shore Wireless messages transmission, the present embodiment preferred wireless mode are carried out afterwards.Specifically, ship is provided with ship wireless communication module, described Ship wireless communication module passes sequentially through marine satellite and ground base station sends ship information to communication module on the bank.
The ship refers to whether have ship on ship without the information for sewing up bank electricity interface without bank electricity interface message is sewed up； Transformer information refers to the information whether on ship with transformer on the ship, can also further comprise the related letter of the transformer Breath；Ship power distribution information, is the information such as distribution voltage needed for ship, distributed frequency, for example, 460V/60Hz, 400V/50Hz or Person 6.6kV/60Hz etc., illustrated in the present embodiment by taking these three ship power distribution standards as an example.The marine main engine information is Refer to the rated power information of marine main engine, marine main engine refers to the diesel-driven generator that rated power is maximum on ship.
Step 12：Judge module selects to be adapted to its size, the corresponding pool of type according to ship model, Ship Types information Position.
Step 2：Whether judge module judges ship equipped with entering on the ship that horizontal high voltage goes on board according to transformer information on ship Transformer, if so, then selection connects high voltage shore power, if it is not, then selection connects low pressure bank electricity.
Specifically, if connecing high voltage shore power equipped with transformer, selection on ship, i.e., being supplied using the high pressure mode of going on board Electricity, such as with the ship that electric standard is 6.6kV/60Hz.If being not equipped with transformer on ship, selection connects low pressure bank electricity, such as With the ship that electric standard is 460V/60Hz or 400V/50Hz.
Step 3：If selection to connect low pressure bank electricity, judge module according to ship power distribution information, judge ship power distribution standard with Whether bank electricity electricity standard is consistent, if so, then selection is powered with pressure with frequency, if it is not, then selecting variable voltage variable frequency power supply；If it is judged as High voltage shore power is connect, then without this step.
In the present embodiment, this step uses 400V/50Hz shore electric power, if ship power distribution standard is 400V/50Hz, Then power with frequency using with pressure, if ship power distribution standard is 460V/60Hz, powered using variable voltage variable frequency.
Step 4：Judge module, without bank electricity interface message is sewed up, judges whether ship there is nothing to sew up bank electricity and connect according to ship Mouthful, if so, then selection is without bank electricity is sewed up, if it is not, then selection power-off connects bank electricity.
Step 5：If simultaneous selection with pressure with frequency power supply and without sewing up bank electricity, judge module according to marine main engine information, Judge whether ship belongs to main frame rated power for 3000 kilowatts or more of large ship, if so, it is flat then to select state to follow Sliding switching method connects bank electricity, if it is not, then selection connects bank electricity based on voltage difference Envelope method；If simultaneous selection variable voltage variable frequency is powered With without bank electricity is sewed up, then state is selected to follow smooth-switching method to connect bank electricity.If being judged as, connecing high voltage shore power or power-off connects bank electricity, Then without this step.
Step 6：The above-mentioned selection result of judge module transmission communication module to central processing module and on the bank, communicates mould on the bank Selection result is sent to ship wireless communication module by block.Central processing module is by display display ship information and accordingly Selection result, notify staff carries out on the bank to connect bank electricity preparation.
For example, it is 400V/50Hz and with without spitkit (the spitkit i.e. main frame for sewing up bank electricity interface with electric standard Rated power is less than 3000 kilowatts), then send and " connect low pressure bank electricity-sewing up bank electricity with frequency power supply-nothing with pressure-and be based on voltage difference Envelope method connects bank electricity " information.The large ship for being 400V/50Hz with electric standard and there is nothing to sew up bank electricity interface, then Send the information of " connecing low pressure bank electricity-same pressure to sew up bank electricity-state with frequency power supply-nothing and follow smooth-switching method to connect bank electricity ".Match somebody with somebody Electric standard is 460V/60Hz and with without the ship for sewing up bank electricity interface, then sends and " connect low pressure bank electricity-variable voltage variable frequency power supply-nothing Sewing up bank electricity-state follows smooth-switching method to connect bank electricity " information.Bank is sewed up with electric standard for 6.6kV/60Hz and with nothing The ship of electrical interface, then send the information of " connect high voltage shore power-nothing and sew up bank electricity ".For 460V/60Hz and do not have with electric standard Information without the ship for sewing up bank electricity interface, then transmission " connect low pressure bank electricity-variable voltage variable frequency power supply-power-off and connect bank electricity ".
Step 7：Ship rests in the corresponding berth of harbour according to selection result.On harbour, different berths is corresponding to be supplied Different size, the ship of type are stopped, and bank electricity equipment that what each berth was provided with connect is also different, according to above-mentioned selection result, institute Judge module is stated to select for ship and its size, type and connect the corresponding berth of bank electricity mode.Such as with electric standard it is 400V/ 50Hz and the spitkit that bank electricity interface is sewed up with nothing, then match, and be furnished with and be based on for its selection with the size of the ship Voltage difference Envelope method connects the berth of the relevant device of bank electricity；If sew up bank with electric standard for 6.6kV/60Hz and with nothing The ship of electrical interface, then matched for its selection with the size of the ship, and the berth for the relevant device gone on board equipped with high pressure；Such as Fruit is that do not have the ship without bank electricity interface is sewed up, then is matched for its selection with the size of the ship, and connect bank equipped with power-off The berth of electric equipment.
The central processing module receives the selection result of judge module, notifies corresponding module with meeting bank electricity side accordingly Method is operated.If selection connects bank electricity based on voltage difference Envelope method, the first power supply module is notified, and perform step 71. If selection state follows smooth-switching method to connect bank electricity, the second power supply module is notified, and perform step 72.If select in high pressure Ship (connects high voltage shore power), then notifies the 3rd power supply module, and perform step 73.If selection power-off connects bank electricity, the 4th is notified Power supply module, and perform step 74.
(1) bank electricity is connect based on voltage difference Envelope method
First power supply module, which is used to realize, is based on voltage difference Envelope method, and it includes bank electricity transformer T1, first Switch K2, second switch K3, voltage difference envelope line detector 11 and control assembly 12.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is the schematic diagram based on voltage difference Envelope method of the embodiment of the present invention one； Fig. 3 is the signal principle figure based on voltage difference Envelope method in the embodiment of the present invention one.
The bank electricity transformer T1, first switch K2 are sequentially connected and access ship electricity.The first switch K2, which is provided with, to be used for First group of contact point with ship electrical connection and second group of contact point for being connected with bank electricity transformer T1.The voltage difference envelope First group of input of line detector 11 is connected with first group of contact point；The voltage difference envelope line detector 11 Second group of input is connected by the second switch K3 with second group of contact point, is connected with parallel with the first switch K2 Connect.The control assembly 12 is connected with the voltage difference envelope line detector 11 and first switch K2 respectively.
The voltage difference envelope line detector 11 obtains the voltage difference envelope signal between shore electric power and ship electricity, and After being converted to periodically positive fluctuating signal, the control assembly 12 is sent to；The control assembly 12 is periodically positive with this Point on the basis of the minimum point of fluctuating signal, T time is respectively taken before and after the datum mark, and the 2T times are set as docking time Section, and switching signal is sent to the first switch K2 in the docking time section, control the first switch K2 to close a floodgate, pass through Bank electricity transformer T1 accesses shore electric power, so as to realize bank electricity and the slitless connection of ship electricity.Wherein, 0≤T≤0.01s, alternating current Cycle be 0.02s, in half period extract closing time point.
Specifically, set u1、u2Ship electricity and bank electricity are expressed as, and the magnitude of voltage of the two voltages can use table of natural sines Show, wherein U1、U2The respectively amplitude voltage of ship electricity and bank electricity voltage；ω1=2 π f1、ω2=2 π f2And ω1And ω2Represent respectively For ship electricity and the angular frequency of bank electricity, f1And f2It is expressed as the frequency of ship electricity and bank electricity；WithShip electricity and bank are represented respectively The phase of piezoelectric voltage, then ship electricity and the voltage difference u of bank electricity meet equation below：
U=u1-u2=U1sin(ω1t+ψ1)-U2sin(ω2t+ψ2)
If U1=U2=U
It follows that the voltage difference of ship electricity and bank electricity is made up of high frequency sinusoidal and low-frequency cosine two parts.
Referring to Fig. 4, it is the ship electricity of the embodiment of the present invention one and the voltage difference envelope signal schematic diagram of bank electricity, specifically , figure (a) is the envelope line chart that ship electricity is identical with the voltage amplitude of bank electricity, frequency is different；It is ship electricity and the voltage of bank electricity to scheme (b) Amplitude and the asynchronous envelope line chart of frequency；Scheme the envelope line chart for the phase that (c) is ship electricity and bank electricity；Scheme (d) be ship electricity and The voltage amplitude of bank electricity is identical, frequency and the asynchronous envelope line chart of phase, the wherein abscissa of fourth officer figure represent the time, indulged Coordinate representation voltage difference amplitude.
If bank electricity and ship electric standard are 400V/50Hz, in the case where fluctuation be present, the voltage difference amplitude of ship electricity and bank electricity The phase difference value of the frequency-splitting Δ f=0.5Hz of Δ U=10%U, ship electricity and bank electricity, ship electricity and bank electricity(wherein, Ψ1=pi/2, Ψ2=-pi/2), transient voltage difference envelope scope：0~1200V is (that is, 0~1.5 × 2U1), envelope Cycle about 4s.Understand that envelope has zero crossing, i.e. ship when ship electricity is identical with the voltage amplitude of bank electricity, frequency is different by scheming (a) Circulation between electricity and bank electricity is 0, now, it is minimum to be constantly electrically accessed caused influence during bank electricity, you can as ship electricity and bank Best opportunity during electric slitless connection.
In the present invention, if ship electricity is consistent with the phase sequence of bank electricity, as the electric U phases of A phase, B phase, C phase and the ship of bank electricity, V phases, The phase sequence of W phases is consistent, then the symmetry according to three-phase voltage, need to only measure the relative voltage of a phase, such as A phases and the ship electricity of bank electricity The voltage difference of U phases, with this with respect to phase relative voltage can with determine ship electricity and bank electricity slitless connection best opportunity.Therefore, In the present embodiment, with ship electricity it is consistent with the phase sequence of bank electricity when, measure the relative voltage of a phase to illustrate how that selection ship is electric and bank Best opportunity during electric slitless connection.
The voltage difference envelope line detector 11 includes voltage difference and obtains circuit 111, absolute value change-over circuit 112 and whole Shape detecting circuit 113.Two inputs that the voltage difference obtains circuit 111 are connected in parallel on the first switch K2 both ends respectively, and Obtain the voltage difference envelope signal of ship electricity and any phase power supply of bank electricity；The voltage difference obtain the output end of circuit 111 with The input connection of the absolute value change-over circuit 112, and the voltage difference envelope signal is sent to the absolute value and changed Circuit 112；The output end of the absolute value change-over circuit 112 is connected with the input of the shaping detecting circuit 113, and by electricity After pressure difference envelope signal is converted to forward voltage difference envelope signal, the shaping detecting circuit 113 is sent to；The shaping Detecting circuit 113 carries out detection processing to voltage difference envelope signal, and after being converted to periodically positive fluctuating signal, is sent to The control assembly 12.
Please refer to Fig. 5 to Fig. 7, Fig. 5 its be Hall voltage sensor component in the embodiment of the present invention one circuit diagram； Fig. 6 is the three groups of output waveform figures measured during Hall voltage sensor zero load in embodiment one；Fig. 7 is Hall electricity in embodiment one The output waveform figure of pressure sensor access ship electricity and bank electricity.Wherein, Fig. 6 abscissa represents time, unit ms；Ordinate table Show voltage difference amplitude, unit V；Fig. 7 abscissa represents time, unit ms；Ordinate represents voltage difference amplitude, unit mV.
The voltage difference, which obtains circuit 111, includes one group of Hall voltage sensor component.The Hall voltage sensor group Part includes the first junction block X1, the first divider resistance R1, the second divider resistance R2, the first Hall voltage sensor A1 and first and surveyed Measure resistance R3.One phase voltage of ship electricity pass through first group of contact point of the first switch K2 and the first junction block X1 the One binding post connects；One phase voltage of bank electricity connects through second group of contact point of the first switch K2 and described first and connect Line seat X1 the second binding post, the wherein ship electricity are consistent with the phase voltage phase sequence of bank electricity.The first Hall voltage sensing Device A1 first input end is connected by the first divider resistance R1 with the first binding post of the first junction block X1；Institute The second input for stating the first Hall voltage sensor A1 passes through the second divider resistance R2's and the first junction block X1 Second binding post connects, and the first Hall voltage sensor A1 passes through the first input end and second input A phase voltage of ship electricity and bank electricity one phase voltage corresponding with the phase voltage of ship electricity are obtained respectively, and then obtain a phase ship The voltage difference envelope signal of electricity and bank electricity；The output end of the first Hall voltage sensor A1 and absolute value conversion electricity The input connection on road 112, and pass through the described first measurement resistance R3 ground connection.
Because current ship electricity frequency meter is likely to occur error, therefore, before ship electricity and bank electricity docking, also match somebody with somebody in ship Accurate frequency table is set on electric installation, by accurate frequency table surveying vessel electricity frequency, and manually or automatically adjusts engine throttle, To adjust ship electricity frequency, make ship electricity frequency lower 0.1Hz-0.5Hz than bank electricity frequency, then enter the docking of navigate electricity and bank electricity, to protect The bearing power that card generator undertakes is up to 100%, and minimum to reach -30%, perfect condition is 50% or so.Prevent bank electricity Inverse probability is too high, generator jitter conditions occurs, causes generator lockage to trip；And reverse-power in the generator is too high, generating can be made Machine automatic trip, during this, it is also possible to the impact of load is brought to bank electricity, the jump of bank electricity lockage is there is also when serious Lock.
The principle of Hall voltage sensor is specifically described below：
The ship electricity and bank electricity of access form primary side to Hall voltage sensor and apply voltage, and then produce electric current in primary side, Due to being acted on by Lorentz force, just the Hall element end in Hall voltage sensor generates magnetic field, so as in Hall Element end produces potential difference.When the voltage change of primary side end, the magnetic field at Hall element end also produces corresponding change, works as voltage When reverse, with regard to reverse, Hall element end produces opposite potential difference in magnetic field.Pass through the operational amplifier in Hall voltage sensor Current signal is amplified, the external world first is output to and measures on resistance, the first ohmically voltage of measurement is exactly primary side end Equal proportion magnitude of voltage.
Please refer to Fig. 8 and Fig. 9, Fig. 8 is the circuit diagram of absolute value change-over circuit in embodiment one；Fig. 9 is embodiment The output waveform figure of absolute value change-over circuit in one, wherein, Fig. 8 abscissa represents time, unit ms；Ordinate represents voltage Spread value, unit mV.
The absolute value change-over circuit 112 includes the first ambipolar ambipolar inputs of input transistors amplifier D6 and second Crystal amplifier D7, first switch diode V45 and second switch diode V36.The first ambipolar input transistors Amplifier D6 4 pins connect -5V1 voltages, and 7 pins of the first ambipolar input transistors amplifier D6 meet 5V1 voltages, institute State the first ambipolar input transistors amplifier D6 3 pins ground connection, and the first ambipolar input transistors amplifier D6 2 pins be connected by resistance R94 with the output end of first Hall voltage sensor.The first ambipolar input crystal Resistance R95 and electricity are also associated between pipe amplifier D6 2 pins and the second ambipolar input transistors amplifier D7 2 pins Hinder R97,2 pins of the first ambipolar input transistors amplifier D6 and the second ambipolar input transistors amplifier D7's 6 pins that resistance R96, the first ambipolar input transistors amplifier D6 are also associated between 3 pins pass through forward direction first Switching diode V45 is connected between the described first ambipolar input transistors amplifier D6 3 pins and resistance R96, and should Pin is connected between resistance R95 and resistance R97 by reverse second switch diode V36, to be carried out to voltage output range Selection；4 pins of the second ambipolar input transistors amplifier D7 connect -5V1 voltages, the second ambipolar input crystal Pipe amplifier D7 7 pins connect+5V1 voltages, the 6 pins output absolute value of the second ambipolar input transistors amplifier D7 Voltage, and the described second ambipolar input transistors amplifier D7 2 pins are connected to by resistance R98, to feed back to circuit.
Please refer to Figure 10 and Figure 11, Figure 10 is the circuit diagram of shaping detecting circuit in embodiment one；Figure 11 is implementation The output waveform of shaping detecting circuit and voltage difference envelope comparison diagram in example one, wherein, abscissa represents the time in Figure 11, single Position is s；Ordinate represents voltage difference amplitude, unit mV, and the graphical representation shaping detecting circuit 113 of Figure 11 top half Output waveform figure, the latter half are expressed as voltage difference envelope oscillogram.
The shaping detecting circuit 113 includes dual operational amplifier D8.8 pins of the dual operational amplifier D8 meet+5V1 Voltage, 4 pins ground connection, 2 pins are connected between resistance R99 and resistance R100；3 pins be connected with resistance R101 after with it is described absolutely 6 pins for being worth change-over circuit 112 are connected；1 pin is grounded after being connected with resistance R100 and resistance R99, and 1 pin passes through electricity Hinder R10 and output Shaping voltage after charging capacitor C40 and charging capacitor C41 in parallel.
Figure 12 is referred to, it is the oscillogram that single-chip microcomputer exports in embodiment one, and abscissa represents the time wherein in figure, single Position is s；Ordinate represents voltage difference amplitude, unit mV, and the figure is followed successively by the output wave of shaping detecting circuit 113 from top to bottom Shape figure, voltage difference envelope oscillogram, the oscillogram of single-chip microcomputer output.
The control assembly 12 includes single-chip microcomputer 121 and industrial computer 122.The input of the single-chip microcomputer 121 and institute The output end connection of shaping detecting circuit 113 is stated, and the positive fluctuating signal of the periodicity is sampled and filtered, and with this week Point setting docking time section, is calculated in the docking time section to the industry control on the basis of the minimum point of phase property forward direction fluctuating signal Machine 122 sends docking signal.The industrial computer 122 sends energization control signal according to the docking signal and opened to described first K2 is closed, the first switch K2 closes a floodgate, and realizes bank electricity and the slitless connection of ship electricity.
During to prevent that bank electricity from accessing, the bank electricity phase sequence electric with ship is inconsistent and burns out motor and ship electrical component, the present invention The port ship based on voltage difference envelope connect that the system of bank electricity also includes the first phase sequence switch (K1) and the second phase sequence switchs (K4). The control assembly 12 also includes the detection device for phase sequence 123 being connected with industrial computer.The first phase sequence is described in detail below to open Close the annexation of (K1) second phase sequence switch (K4) and detection device for phase sequence 123.
Because the A phase, B phase, C phase of ship electricity is consistent with motor G2 A2 phases, B2 phases and C2 phase sequences, therefore detection is only needed to become Whether the output end U phases of depressor, V phases, W phases are consistent with the A phase, B phase, C phase sequence of ship electricity, can be to determine the output end of transformer Whether U phases, V phases, W phases are consistent with motor G2 A2 phases, B2 phases and C2 phase sequences.Specifically, the A phase, B phase, C phase of ship electricity is led to respectively Cross the first phase sequence switch (K1), first switch (K2) is connected with the output end U phases, V phases, W of transformer；Ship electricity A phases, B phases, C phases switch (K4) by the second phase sequence and the first phase sequence switch (K4), first switch (K2) are connected with the V phases, U phases, W of bank electricity It is corresponding.A phase, B phase, C phase of the described detection device for phase sequence one end respectively with ship electricity is connected, the other end output with transformer respectively End U phases, V phases, W are connected, and to detect ship electricity, whether phase sequence is consistent with bank electricity：If phase sequence is consistent, the first phase sequence switch is closed (K1) second switch K3 is closed, starts to detect voltage difference envelope；If phase sequence is inconsistent, the second phase sequence switch (K4) is closed, Start to detect voltage difference envelope again.
In the present invention, the frequency fluctuation of ship electric engine is 0.5Hz, and bank electricity frequency is the 50Hz of standard, therefore frequency difference should Within 1%.For the ease of the detection of system, the frequency difference of setting bank electricity and ship electricity just can be by first switch K2 within 1% Close a floodgate.
Therefore, in the present embodiment, the control assembly 12 also includes the detection device for phase sequence being connected with industrial computer 123rd, phase detection device 124, voltage check device 125, frequency detecting device 126, current sensing means 127 and display unit 128.The phase detection device 124, voltage check device 125, frequency detecting device 126 and current sensing means 127 are distinguished Access the detection switch component K and first switch K2 first make contact between, with detect ship electricity phase sequence, phase, voltage, The power information such as frequency and electric current, and shown by display unit 128.By comparing the frequency of ship electricity and bank electricity, to ensure bank The frequency of electricity and ship electricity is just closed a floodgate within 1%.Further, the control assembly 12 is additionally operable to detect and shows ship electricity Lock disconnected with both bank electricities and the information such as front and rear voltage, electric current, power, power factor (PF) and frequency of closing a floodgate.
The operation principle of whole system is specifically described below：
1st, ship electricity, which does not power off, is incorporated to bank electricity
Cable is connected, the switch K5 of marine generator is closed a floodgate.By industrial computer 122 to ship electricity phase sequence, phase, electricity Pressure and frequency are sampled, and compared with bank electricity, judge whether A, B, C phase of ship electricity are corresponding with U, V, W phase sequence of bank electricity, If phase sequence is consistent, then the first phase sequence switch K1 is closed, if phase sequence is inconsistent, close the second phase sequence switch K4；Ship is judged again Electric frequency is lower 0.1Hz-0.5Hz than the frequency of bank electricity, if ship electricity frequency is lower 0.1Hz-0.5Hz than the frequency of bank electricity, obtains ship The voltage difference envelope signal of electricity and bank electricity, otherwise, without ship electricity and the mating operation of bank electricity.
When entering the voltage difference envelope signal detection of navigate electricity and bank electricity, second switch is controlled by industrial computer 122 K3 closes a floodgate, and first Hall voltage sensor obtains the voltage difference envelope signal of ship electricity and any phase power supply of bank electricity, and It is sent to absolute value change-over circuit 112；Voltage difference envelope signal is handled by absolute value change-over circuit 112, output is set Determine the forward voltage difference envelope signal in scope, and be sent to shaping detecting circuit 113；By shaping detecting circuit 113 to this After forward voltage difference envelope signal carries out shaping acquisition periodically positive fluctuating signal, single-chip microcomputer 121 is sent to；Single-chip microcomputer After 121 pairs of positive fluctuating signals are sampled and filtered, and the point on the basis of the minimum point of the periodically positive fluctuating signal Docking time section is set, and then forms periodic square wave signal, and is sent out in the docking time section to the industrial computer 122 Docking signal is sent, switching signal is sent to first switch K2 by industrial computer 122, and then controls first switch K2 to close a floodgate, it is real Spot electricity and the slitless connection of bank electricity, and then realize ship electricity onshore electrotransfer.
2nd, bank electricity, which does not power off, is incorporated to ship electricity
The switch K5 of marine generator is closed a floodgate and establishes voltage, now, marine generator and bank electricity transformer T1 it Between formed voltage difference and impact circulation, adjust marine generator speed-regulating switch, industrial computer 122 control first switch K2 open Lock, and then the bank electricity transformer T1 voltage supply of bank electricity is cut off, it is incorporated to ship electricity so as to realize that bank electricity does not power off.
The step 71 of the present invention, specifically includes following steps：
Step 711：Ship electricity and the voltage difference envelope signal of bank electricity are obtained, and is converted to periodically positive fluctuating signal.
Two inputs that the voltage difference obtains circuit are connected in parallel on the first switch both ends respectively, and obtain ship electricity and bank The voltage difference envelope signal of any phase power supply of electricity；The voltage difference obtains the output end and absolute value conversion electricity of circuit The input connection on road, and the voltage difference envelope signal is sent to the absolute value change-over circuit；The absolute value conversion The output end of circuit is connected with the input of the shaping detecting circuit, and voltage difference envelope signal is converted into forward voltage After poor envelope signal, the shaping detecting circuit is sent to；The shaping detecting circuit is carried out to voltage difference envelope signal Detection is handled, and after being converted to periodically positive fluctuating signal, is sent to the control assembly.
Wherein, the concrete structure and principle of the absolute value change-over circuit and the shaping detecting circuit and embodiment 1 It is identical, it is not repeated here here.The structure that the voltage difference obtains circuit is the structure disclosed in embodiment 1, for straight Obtain the voltage difference envelope signal for taking phase ship electricity and bank electricity.Or the structure of the voltage difference acquisition circuit is embodiment 2 Disclosed in structure, for pass through voltage multiplexer gating obtain a phase ship electricity and bank electricity voltage difference envelope signal.
In one embodiment, before the voltage difference envelope signal of ship electricity and bank electricity is obtained, ship electricity and bank are also judged Whether the phase sequence connection of electricity is consistent, if unanimously, obtaining ship electricity and the voltage difference envelope signal of bank electricity, otherwise, passing through switching Phase sequence switch makes ship electricity be connected unanimously with the phase sequence of bank electricity.Specifically, the A phase, B phase, C phase of the ship electricity is opened by the first phase sequence Pass K1 and first switch K2 is connected corresponding with the U phases, V phases, W of bank electricity；The A phase, B phase, C phase of ship electricity is switched by the second phase sequence K4 and first switch K2 is connected corresponding with the V phases, U phases, W of bank electricity；It is whether consistent with the phase sequence of bank electricity by comparing ship electricity, with Connect the first phase sequence switch K2 or the second phase sequence switch K4.
In one embodiment, because current ship electricity frequency meter is likely to occur error, before ship electricity and bank electricity docking, Accurate frequency table is set also on ship power distribution device, by accurate frequency table surveying vessel electricity frequency, and manually or automatically passed through Adjust engine throttle, to adjust ship electricity frequency, make ship electricity frequency lower 0.1Hz-0.5Hz than bank electricity frequency, then enter to navigate electricity and The docking of bank electricity, to ensure that the bearing power that generator undertakes is up to 100%, minimum to reach -30%, perfect condition is 50% or so.Prevent that bank electricity inverse probability is too high, generator jitter conditions occur, cause generator lockage to trip；And generator is inverse Power is too high, can make generator automatic trip, during this, it is also possible to the impact of load is brought to bank electricity, when serious also Occur that bank electricity lockage trips.
Step 712：The point on the basis of the minimum point of the periodically positive fluctuating signal, T is respectively taken before and after the datum mark Time, and the 2T times are set as docking time section, wherein 0≤T≤0.01s.
Step 713：Current time is judged whether in the docking time section, if so, then docking ship electricity and bank electricity.
The positive fluctuating signal of the periodicity is sampled and filtered by single-chip microcomputer, and with the periodically positive pulsation letter Number minimum point on the basis of point setting docking time section, in the docking time section to industrial computer send docking signal industry control Computer sends energization control signal according to the docking signal and closed a floodgate to the first switch, the first switch, realizes bank electricity With the slitless connection of ship electricity.
When ship needs offshore when port, now need execution bank electricity not power off and be incorporated to ship electricity, this can be by marine generator Switch closes a floodgate and establishes voltage, now, voltage difference and impact circulation, regulation is formed between marine generator and bank electricity transformer Marine generator speed-regulating switch, bank electricity transformer transferring load, when bank electricity transformer load power is reduced to 5%PN, industry control Computer control is opened a sluice gate, and then cuts off the bank electricity transformer voltage supply of bank electricity, and ship electricity is incorporated to so as to realize that bank electricity does not power off.
Compared to prior art, the present invention obtains voltage by surveying vessel electricity and the voltage difference envelope signal of bank electricity The minimum point of poor envelope signal, and docking time section is set according to the minimum point, the letter that closes a floodgate is sent in the docking time section Number, in the case of continuous ship electricity, bank electricity and the slitless connection of ship electricity are realized, effectively prevents circulation when ship electricity is connected with bank electricity Damage caused by the generator of potential device, ship to bank electricity, ship equipment, it is ensured that bank electricity, marine generator and ship The normal operation of equipment.
(2) state follows smooth-switching method to connect bank electricity
Second power supply module is used to realize that state follows smooth-switching method.
Figure 13 is referred to, it follows the schematic diagram of smooth-switching method for the state of the embodiment of the present invention one.The present invention's Second power supply module includes bank electricity transformer, rectification adverser, 50Hz circuits, 60Hz circuits, common line and control line Road, the control circuit include interior ring controller, outer ring controller, the outer ring controller include V/f controllers, P/Q controllers, Pll controller.The bank electricity transformer of second power supply module can use same with the bank electricity transformer of the first power supply module Individual bank electricity transformer, different circuits or two special bank electricities are connected respectively when connecing bank electricity method using difference Transformer, the different respective lines for connecing bank electricity method are respectively used to, other devices are similarly.In the present embodiment, bank electricity uses 400V/50Hz electricity systems, are available for 400V/50Hz ships and 460V/60Hz ship seamless access.50Hz-60Hz refers to 50Hz bank Electricity docks with 60Hz ship electricity, using 60Hz circuits, 400V/50Hz bank electricity is docked with 460V/60Hz ship electricity, 50Hz- 50Hz refers to that 50Hz bank electricity is docked with 50Hz ship electricity, using 50Hz circuits, by 400V/50Hz bank electricity and 400V/50Hz Ship electricity docking.
The bank electricity transformer T1, rectification adverser UI1,50Hz circuit, common line are sequentially connected, bank electricity transformer T1, rectification adverser UI1,60Hz circuit, common line are sequentially connected, 50Hz or 60Hz lines are selected according to ship power distribution information Road；The bank electricity transformer other end is used to be connected with bank electricity, and the common line other end is used to electrically connect with ship.
Specifically, the 50Hz circuits include the 6th switch K6, the 7th switch K7, the first inductance L1, the second inductance L2, the Four inductance L4 and the first electric capacity C1, the 60Hz circuits include the 8th switch K8, the 3rd inductance L3, the electricity of the 5th inductance L5 and second Hold C2, the common line includes the 4th resistance R4, the 6th inductance L6 and the 9th switch K9；Bank electricity transformer T1 one end is used for Bank electricity is connected, the other end connects rectification adverser UI1 one end, the 6th switch K6, rectification adverser UI1 other end difference respectively Connect the 7th switch K7 and the 8th switch K8 one end；The 6th switch K6 other end concatenates the switch of connection the 7th after the first inductance L1 The K7 other end, the 7th switch K7 other end connect the second inductance L2 the first connection end, and the second of the second inductance L2 connects Connect to hold and be sequentially connected in series the 4th inductance L4, the 4th resistance R4, the switches of the 6th inductance L6 and the 9th K9 one end, the one of the first electric capacity C1 End is connected between the second inductance L2 and the 4th inductance L4, its other end ground connection；The 8th switch K8 electricity of other end connection the 3rd Feel L3 the first connection end, the 3rd inductance L3 second connection end is sequentially connected in series the 5th inductance L5, the 4th resistance R4, the 6th inductance The switches of L6 and the 9th K9 one end, the second electric capacity C2 one end are connected between the 3rd inductance L3 and the 5th inductance L5, and its is another End ground connection；The 9th switch K9 other end is used to electrically connect with ship.4th resistance R4, the 6th inductance L6 are to be used for current limliting, at it It can also be omitted in his embodiment.
The step 72 of the present invention, specifically includes following steps：
Step 721：Second power supply module electrically connect with shore electric power, ship electricity respectively, specifically by bank electricity transformer and Bank electricity is connected, and the other end of common line is electrically connected with ship；50Hz or 60Hz circuits are selected according to ship power distribution information；If ship Electric standard is 50Hz, then selects 50Hz circuits, and the 7th switch and the 9th switch are closed；If ship electric standard is 60Hz, select 60Hz circuits, the 8th switch and the 9th switch are closed.
Step 722：Rectification adverser uses inner ring control method and outer loop control method, in this step, outer shroud control Method uses V/f control methods, and the target frequency of bank electricity transformer output is converted to by the target frequency of marine generator；Together When, coordinate stable frequency and voltage with phase locking loop controlling method.
According to rectification adverser V/f Elementary Theory of Control, V/f controls are made up of current inner loop and outer voltage, main system Number has：Electric current loop Proportional coefficient KpiWith integral coefficient Kii, Voltage loop Proportional coefficient KpvWith integral coefficient KivIf load equivalent is electric Hinder R, equivalent reactance X, filter inductance Ls, rectification adverser output current disregards capacitor filtering I1≈I2≈I、Id、IqRespectively dq Axis component.
If the reference value U of Voltage looprefDq axis components UdrefAnd UqrefFor input, the dq axles of rectification adverser output voltage Component VdAnd VqFor output, system equation is below equation：
Specifically, in the present invention, step 722 comprises the following steps：
Step 7221：A points are set at the second connection end of the second inductance and the second connection end of the 3rd inductance, obtained Rectification adverser output current value i at A points1, and calculate its dq axis component i1d、i1q；Between the 4th inductance and the 4th resistance And the 5th set B points between inductance and the 4th resistance, rectification adverser output voltage values v, current value i at B points are obtained2, Wherein, voltage v includes its abc axis component va、vb、vc, then calculating current value i2Dq axis components i2d、i2q, and the dq of voltage Axis component vd、vq；
Step 7222：Input ω, uref、vd、vq, electric current loop reference value i is obtained according to V/f control methodsdref、iqref, tool Body formula is as follows：
θ=∫ (2 π f- ω) dt, Udref=urefcosθ,Uqref=urefsinθ,
idref=Kpv(udref-vd)+Kiv∫(udref-vd)dt,iqref=Kpv(udref-vd)+Kiv∫(uqref-vq)dt
Wherein, urefFor Voltage loop reference value, being set according to the voltage of ship electricity, ω is that rectification adverser exports angular frequency, That is the electric voltage frequency 60Hz, θ of ship electricity are rectification adverser output voltage phase angle, KpvFor Voltage loop proportionality coefficient, KivFor Voltage loop Integral coefficient；
Step 7223：Input i1d、i1q、i2d、i2q、idref、iqref、vd、vq, v is obtained according to inner ring control methodsd、vsq, Specific formula is as follows：
vsd=vd-ωLsilq+Kpi(idref-i2d)+Kii∫(idref-i2d)dt
vsq=vq-ωLsilq+Kpi(iqref-i2q)+Kii∫(iqref-i2q)dt；
Wherein, KpiFor electric current loop proportionality coefficient, KiiFor electric current loop integral coefficient, LsFor filter inductance；
Step 7224：Input vsd、vsq, its abc axis component is calculated, is exported after being converted to PWM to rectification adverser.
In one embodiment, while step 2 is carried out, phase lock control is carried out, with stable frequency and voltage.
Theoretical according to phase lock control, in the frequency change of input quantity, the output of three-phase phase-locked loop is still same with input The output signal of frequency same-phase, under the conditions of it direct current offset, asymmetrical three-phase, harmonic distortion etc. be present in input, three-phase phase-locked loop All there is preferable antijamming capability.With reference to below equation, wherein θ is rectification adverser output voltage phase angle, θpllFor phaselocked loop Output, ωff、θffRespectively desired value：
vq=V sin (θ-θpll)
θ=ω0t+θ0
While step 722 i.e. of the invention, 726 are synchronously followed the steps below：
Step 7261：A points are set at the second connection end of the second inductance and the second connection end of the 3rd inductance, obtained Rectification adverser output current value i at A points1, and calculate its dq axis component i1d、i1q；Between the 4th inductance and the 4th resistance And the 5th set B points between inductance and the 4th resistance, rectification adverser output voltage values v, current value i at B points are obtained2, Wherein, voltage v includes its abc axis component va、vb、vc, then calculating current value i2Dq axis components i2d、i2q, and the dq of voltage Axis component vd、vq；
Step 7262：Input va、vb、vc、ωff, phaselocked loop output θ is obtained according to phase locking loop controlling methodpll, specific formula It is as follows：
ωpll=ωff+Kp.pllvq+Ki.pll∫vqdt
Wherein, Kp.pllFor phaselocked loop proportionality coefficient, Ki.pllFor phaselocked loop integral coefficient, ωffFor theoretical angular frequency, ωff= 2*π*60Hz；ωpllFor the angular frequency of rectification adverser output voltage；
Step 7263：Input θpll, exported after processing to rectification adverser.
The phase locking loop controlling method of step 726, the output frequency and voltage of rectification adverser can be stablized.
Step 723：The outer loop control method of rectification adverser is converted to using P/Q control methods, control by V/f control methods Marine generator frequency processed and voltage, using ship electricity Real-time Load power as target power, power transfer is carried out, rectification adverser is defeated Go out power to be stepped up, marine generator power output is gradually reduced；Meanwhile with phase locking loop controlling method coordinate stable frequency and Voltage.During this, marine generator load can be adjusted with droop control, automatic frequency adjustment or regulation speed regulator is negative to reduce manually Lotus.
According to rectification adverser P/Q control theories, P/Q controls the peak use rate that intermittent power supply is realized in microgrid, Export active and idle respectively its reference value PrefAnd Qref.Its control principle is：Power set-point subtracts each other with measured value, passes through Current reference signal i is obtained after pi controllerdref、iqref, so as to control rectification adverser power output, P/Q controls Proportional coefficient KpPWith integral coefficient KiP, with reference to below equation：
Pref=KP/f(fref-f)
Qref=KQ/f(Uref-U)
Specifically, in the present invention, step 723 comprises the following steps：
Step 7231：A points are set at the second connection end of the second inductance and the second connection end of the 3rd inductance, obtained Rectification adverser output current value i at A points1, and calculate its dq axis component i1d、i1q；Between the 4th inductance and the 4th resistance And the 5th set B points between inductance and the 4th resistance, rectification adverser output voltage values v, current value i at B points are obtained2, Wherein, voltage v includes its abc axis component va、vb、vc, then calculating current value i2Dq axis components i2d、i2q, and the dq of voltage Axis component vd、vq；
Step 7232：Input vd、vq、i2d、i2q、Pref、Qref, electric current loop reference value i is obtained according to P/Q control methodsdref、 iqref, specific formula is as follows：
P=vdi2d+vqi2q, Q=vqi2d+vdi2q
idref=KpP(Pref-P)+KiP∫(Pref-P)dt
iqref=KpQ(Qref-Q)+KiQ∫(Qref-Q)dt
Wherein, PrefFor active power reference value, QrefFor reactive power reference qref, KpPFor the proportionality coefficient of real power control, KpQFor the proportionality coefficient of idle control, KiPFor the integral coefficient of real power control, KiQFor the integral coefficient of idle control；
Step 7233：Input i1d、i1q、i2d、i2q、idref、iqref、vd、vq, v is obtained according to inner ring control methodsd、vsq, Specific formula is as follows：
vsd=vd-ωLsilq+Kpi(idref-i2d)+Kii∫(idref-i2d)dt
vsq=vq-ωLsilq+Kpi(iqref-i2q)+Kii∫(iqref-i2q)dt；
Wherein, KpiFor electric current loop proportionality coefficient, KiiFor electric current loop integral coefficient, LsFor filter inductance；
Step 7234：Input vsd、vsq, its abc axis component is calculated, is exported after being converted to PWM to rectification adverser.
While step 3 is carried out, phase lock control is carried out, with stable frequency and voltage, i.e., step 6 is carried out simultaneously, walks Rapid 6 have been illustrated above, and repeat no more.
Step 724：When marine generator power output drops to predetermined power, marine generator is closed, and power supply is seamless Switching is completed.Specifically, predetermined power is 5% marine generator rated power, and it is big can also to be according to circumstances arranged to other It is small.
Step 725：If ship electric standard is 50Hz, i.e., ship electricity is that 400V/50Hz electricity is made with bank electricity, then inverse without rectification Become device and carry out transformation and frequency modulation, now can bypass rectification adverser, directly powered by bank electricity transformer, to save electric energy, specifically It is the switch of closure the 6th；If ship electric standard is 60Hz, this step is not performed, i.e. step 724 has been completed to operate.
When ship needs offshore, then the contrary operation of above-mentioned steps is taken：Start marine generator first, make generator It is connected with the second power supply module, then rectification adverser bearing power is shifted to marine generator on the bank, and plus-minus oil is coordinated on ship Door operation, when the bearing power of rectification adverser on the bank be reduced to 5% rated power or it is following when (now electric current very little), second Power supply module is electrically disconnected with ship, completes power supply seamless switching.
The state of the present invention follows smooth-switching method, and in bank electricity and ship electricity power switching, equipment on board need not power off, Following frequency f is controlled by V/f, then is controlled by P/Q and is transferred to bearing power in bank electricity from marine generator, is completed seamless Switching；In addition, bank electricity 50Hz power supplys can be realized, 60Hz or the different power network standards of two kinds of 50Hz ship are powered, fitted The needs of different ships are answered, when carrying out 50Hz ships without bank electricity is sewed up, without with traditional synchronous meter or Current limited Control, But use 60Hz rectification adversers as 50Hz is seamless and smoothly connect bank electricity transition apparatus, after the completion of switching, closing commutation inversion Device, it is transformed into bank electricity transformer from 50Hz inversions power supply and directly powers, realize the smooth connection of non-impact current.
(3) high pressure is gone on board
Step 73：6.6kV/60Hz bank electricity is electrically connected with ship, the 3rd power supply module control ship load onshore electricity turns Move, after the completion of transfer, close marine generator.This step can specifically use the high pressure in current technology go on board method, herein Repeat no more.
(4) power-off connects bank electricity
Step 74：Equipment on board is closed, turns off marine generator, the 4th power supply module, will according to ship power distribution information Corresponding shore electric power is connected with ship, such as when ship electricity is 6.6kV/60Hz, is then connected with 6.6kV/60Hz bank electricity, ship is electric For 400V/50Hz when, then be connected with 400V/50Hz shore electric power, when ship electricity is 460V/60Hz, then shore electric power passes through bank After piezoelectric transformer and rectification adverser carry out transformation and frequency conversion, it is connected with ship.After shore electric power is connected with ship, open on ship Equipment.
Step 8：Frequency, voltage, electric current and phase information when detection module detection bank electricity is ship power supply, and send to Accounting module.Accounting module calculates current total the electricity consumption electricity charge and the electricity charge, and sends to central processing module and communication module on the bank, Communication module currently will be sent to ship wireless communication module in total the electricity consumption electricity charge and the electricity charge on the bank.Specifically include following steps：
Step 81：Frequency detection module, voltage detection module, current detection module and phase detecting module detect bank respectively Frequency, voltage, electric current and phase information when electricity is ship power supply.
Step 82：Accounting module receives above- mentioned information, and according to formulaBank electricity is calculated in real time Output electricity in power supply process, wherein, W is currently always uses power consumption, when t is the existing continuous that bank electricity is ship power supply Between, U is the instant line voltage of shore electric power, and I is the instant line current of shore electric power,For current phase voltage and current phase current Phase difference,For the real-time power factor of shore electric power.Phase is calculated always according to current total electricity consumption electricity in accounting module The electricity charge answered.
Step 83：Accounting module currently total the electricity consumption electricity charge and the electricity charge will send to central processing module and communicate on the bank mould Block, on the bank communication module currently total the electricity consumption electricity charge and the electricity charge will send to ship wireless communication module.
In addition, if Ship Types are oil carrier or liquefaction motor boat or other conditional special ship types, if do not led to The safe handling for connecing bank electricity is crossed, then can not connect bank electricity.
The ship of the present invention connects bank electricity method and system, can according to ship whether equipped with transformer on ship, whether match somebody with somebody Have without bank electricity interface, the ship information of ship power distribution standard is sewed up, accurate judgement ship connects bank electricity using which kind of mode, significantly Improve the efficiency that ship connects bank electricity；Further, a variety of power supply modes are provided for the different ships with electric standard, the shape provided State follows smooth-switching method and is based on voltage difference Envelope method, can realize ship electricity and the seamless switching of bank electricity, be set on ship It is standby to power off and restart, simplify powered operation, improve Supply Security.
Embodiment two
The ship of the present embodiment connects bank electricity method and system and embodiment one is essentially identical, should be based on voltage difference envelope side The principle of method, and the structure of the first power supply module and embodiment one it is essentially identical, the main distinction is, the voltage difference envelope The difference of structure in line detector 11, the ship electricity and bank electricity of a wherein phase are obtained for being gated by voltage multiplexer Voltage difference envelope signal.
Figure 14 is referred to, it is the circuit diagram of voltage difference envelope line detector in embodiment two.
Specifically, the voltage difference envelope line detector, which includes voltage difference, obtains circuit 0111, absolute value change-over circuit 0112 and shaping detecting circuit 0113.Two inputs that the voltage difference obtains circuit 0111 are connected in parallel on the first switch respectively K2 both ends, and obtain the voltage difference envelope signal of ship electricity and the three phase mains of bank electricity；The voltage difference obtains circuit 0111 Output end is connected with the input of the absolute value change-over circuit 0112, and by the voltage difference envelope signal be sent to it is described absolutely To being worth change-over circuit 0112；The output end of the absolute value change-over circuit 0112 and the input of the shaping detecting circuit 0113 Connection, and after voltage difference envelope signal is converted into forward voltage difference envelope signal, it is sent to the shaping detecting circuit 0113；The shaping detecting circuit 0113 carries out detection processing to voltage difference envelope signal, and is converted to periodically positive arteries and veins After dynamic signal, the control assembly is sent to.
The voltage difference, which obtains circuit 0111, includes six groups of Hall voltage sensor component A1-A6 and voltage multiplexer D9, one of which Hall voltage sensor obtains ship electricity and bank electricity AU either BV or CW voltage differential signals, and is sent to described Voltage multiplexer D9；The output end of the voltage multiplexer D9 and the input of the absolute value change-over circuit 0112 Connection, by the corresponding ship electricity of voltage multiplexer D9 gatings one and the voltage difference envelope signal of bank electricity, and will The voltage difference envelope signal is sent to the absolute change-over circuit；Five groups of other Hall voltage sensor groups are as standby.
Two inputs of the Hall voltage sensor component A1 are respectively connecting to the A phases of ship electricity and the U phase voltages of bank electricity, Either it is respectively connecting to the B phases of ship electricity and the V phase voltages of bank electricity or is respectively connecting to the C phases of ship electricity and the W phases electricity of bank electricity Pressure.
The Hall voltage sensor component A1 includes junction block, the 3rd divider resistances of 4 series connection, the of two series connection Four divider resistances, the second Hall voltage sensor and the second measurement resistance.First binding post of the junction block is connected to ship The A phase voltages of electricity, the second binding post of the junction block are connected to the B phase voltages of ship electricity.The second Hall voltage sensing The first input end of device is connected by the 3rd divider resistance of described 4 series connection with the first binding post of the junction block, institute State fourth divider resistance and the junction block of the second input of the second Hall voltage sensor by described two series connection Second terminals connect.What the output end of second Hall voltage sensor was connected to the voltage multiplexer D9 13 draws Pin, and pass through the described second measurement resistance eutral grounding.
The structure and principle of standby five groups of Hall voltage sensor components and Hall voltage sensor component A1 are complete in addition It is exactly the same, the part difference that input connects with output end is differed only in, is no longer repeated one by one here.
16 pins and 7 pins of the voltage multiplexer connect+5V1 voltages and -5V1 voltages, 6 pins and 8 respectively Pin is grounded.11 pins, 10 pins and 9 pins of the voltage multiplexer are the address end being connected with single-chip microcomputer 121, are led to The input that single-chip microcomputer 121 controls three pins is crossed, so as to control the input condition of other pins, so as in the voltage multichannel 3 pins of multiplexer export the voltage difference envelope signal of a corresponding ship electricity and bank electricity.
Specifically, 11 pins of the voltage multiplexer D9 connect+5V1 voltages by resistance R107, the voltage is more It is connected between 11 pins and resistance R107 of path multiplexer with triode V37 colelctor electrode, and triode V37 emitter stage connects Ground, triode V37 base stage are connected to single-chip microcomputer 121.10 pins of the voltage multiplexer D9 are connect by resistance R109+ 5V1 voltages, it connects between 10 pins and resistance R109 of the voltage multiplexer D9 with triode V37 colelctor electrode Connect, and triode V37 grounded emitter, triode V37 base stage are connected to single-chip microcomputer 121.The voltage multiplexer D9 9 pins connect+5V1 voltages by resistance R111, and it is between 9 pins and resistance R111 of the voltage multiplexer D9 It is connected with triode V37 colelctor electrode, and triode V37 grounded emitter, triode V37 base stage are connected to single-chip microcomputer 121。
The absolute value change-over circuit 0112 and shaping detecting circuit 0113 are identical with the structure of embodiment 1, here It is not repeated here.
In the present embodiment, the voltage difference envelope line detector 11 ' also includes current acquisition circuitry 114 ', the electric current Obtain circuit 114 ' by obtain ship electricity or bank electricity electric current, with real time detect both work when current status.
Compared to prior art, the present invention gates the ship electricity of a phase and the voltage difference bag of bank electricity by measuring voltage multiplexer Winding thread signal, and the minimum point of voltage difference envelope signal is obtained, and docking time section is set according to the minimum point, in the docking Switching signal is sent in period, in the case of continuous ship electricity, bank electricity and the slitless connection of ship electricity is realized, effectively prevents ship Circulation damages to caused by the potential device of bank electricity, the generator of ship, ship equipment when electricity is connected with bank electricity, it is ensured that bank The normal operation of electricity, marine generator and ship equipment.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention Scope.

Claims (10)

1. a kind of ship connects bank electricity method, it is characterised in that：Comprise the following steps：
Whether inquiry has the ship information input that request connects bank electricity, and the ship information includes ship to be believed without bank electricity interface is sewed up Breath, transformer information and ship power distribution information on ship, if continuing whether inquiry has ship information input without if, performed if having with Lower step：
According to transformer information on ship, whether ship is judged equipped with transformer on the ship that horizontal high voltage goes on board is entered, if so, then selecting High voltage shore power is connect, if it is not, then selection connects low pressure bank electricity；
If selection connects low pressure bank electricity, according to ship power distribution information, judge whether ship power distribution standard and bank electricity electricity standard are consistent, If so, then selection is powered with pressure with frequency, if it is not, then selecting variable voltage variable frequency power supply；
According to ship without bank electricity interface message is sewed up, judge whether ship has without bank electricity interface is sewed up, if so, then selecting seamless Bank electricity is connect, if it is not, then selection power-off connects bank electricity.
2. ship according to claim 1 connects bank electricity method, it is characterised in that：The ship information also includes marine main engine Information；It is further comprising the steps of that the ship connects bank electricity method：
If simultaneous selection, with frequency power supply and without bank electricity is sewed up, according to marine main engine information, judges whether ship belongs to main with pressure Machine rated power is 3000 kilowatts or more of large ship, if so, then selection state follows smooth-switching method to connect bank electricity, if No, then selection connects bank electricity based on voltage difference Envelope method；
If simultaneous selection variable voltage variable frequency is powered and without bank electricity is sewed up, the state of selection follows smooth-switching method to connect bank electricity.
3. ship according to claim 2 connects bank electricity method, it is characterised in that：If selection is based on voltage difference Envelope method Bank electricity is connect, then after ship pulls in shore, performs following steps：
By the accurate frequency table surveying vessel electricity frequency being arranged on ship power distribution device, and manually or automatically adjust engine oil Door, to adjust ship electricity frequency, makes ship electricity frequency lower 0.1Hz-0.5Hz than bank electricity frequency；
After the voltage difference envelope signal of ship electricity and bank electricity is obtained, periodically positive fluctuating signal is converted into；
The point on the basis of this periodically minimum point of positive fluctuating signal, respectively takes T time before and after the datum mark, and by the 2T Time is set as docking time section, wherein 0≤T≤0.01s；
Current time is judged whether in the docking time section, if then docking ship electricity and bank electricity.
4. ship according to claim 2 connects bank electricity method, it is characterised in that：If selection state follows smooth-switching method Bank electricity is connect, then after ship pulls in shore, performs following steps：
Bank electricity transformer, rectification adverser are electrically connected with shore electric power, ship electricity respectively, 50Hz is selected according to ship power distribution information Or 60Hz circuits；
Inner ring control method and outer loop control method are used to rectification adverser, wherein, outer loop control method uses V/f controlling parties Method, the target frequency of bank electricity transformer output is converted to by the target frequency of marine generator；Meanwhile use phase lock control side The frequency and voltage of method control rectification adverser output；
The outer loop control method of rectification adverser is converted into P/Q control methods, control marine generator frequency by V/f control methods Rate and voltage, using ship electricity real time load power as target power, power transfer is carried out, makes the increase of rectification adverser power output, Marine generator power output declines；Meanwhile the frequency and voltage exported using phase locking loop controlling method control rectification adverser；
When marine generator power output drops to predetermined power, marine generator is closed.
5. a kind of ship connects bank electricity system, it is characterised in that：Including communication module on the bank and judge module；
The communication module on the bank is used to inquire about the ship information input for whether having request to connect bank electricity, if so, then by ship information Judge module is sent to, if nothing, continues whether inquiry has ship information input；The ship information includes ship without sewing up bank Transformer information and ship power distribution information in electrical interface information, ship；
The judge module is used for：
According to transformer information on ship, whether ship is judged equipped with transformer on the ship that horizontal high voltage goes on board is entered, if so, then selecting High voltage shore power is connect, if it is not, then selection connects low pressure bank electricity；
If being judged as connecing low pressure bank electricity, according to ship power distribution information, judge ship power distribution standard and bank electricity electricity standard whether one Cause, if so, then selection is powered with pressure with frequency, if it is not, then selecting variable voltage variable frequency power supply；
According to ship without bank electricity interface message is sewed up, judge whether ship has without bank electricity interface is sewed up, if so, then selecting seamless Bank electricity is connect, if it is not, then selection power-off connects bank electricity.
6. ship according to claim 5 connects bank electricity system, it is characterised in that：The ship information also includes marine main engine Information；The judge module is additionally operable to, and when simultaneous selection is with the same frequency power supply of pressure and without bank electricity is sewed up, is then believed according to marine main engine Breath, judges whether ship belongs to main frame rated power for 3000 kilowatts or more of large ship, if so, then selection state follows Smooth-switching method connects bank electricity, if it is not, then selection connects bank electricity based on voltage difference Envelope method；When simultaneous selection variable voltage variable frequency supplies When electricity and nothing sew up bank electricity, then state is selected to follow smooth-switching method to connect bank electricity.
7. ship according to claim 6 connects bank electricity system, it is characterised in that：Also include central processing module, the first confession Electric module；The central processing module receives the selection result of judge module, if selection connects bank based on voltage difference Envelope method Electricity, then notify the first power supply module；
First power supply module includes bank electricity transformer, first switch, voltage difference envelope line detector, control assembly and the Two switches；
The bank electricity transformer accesses ship electricity via the first switch；The voltage difference envelope line detector and described first Switch in parallel is connected, and the voltage difference envelope signal between the bank electricity of acquisition and ship electricity is converted into periodically positive pulsation letter After number, the control assembly is sent to；The control assembly respectively with the voltage difference envelope line detector and first switch Connection；Control assembly point on the basis of the minimum point of the periodically positive fluctuating signal, T is respectively taken before and after the datum mark Time, and the 2T times are set as docking time section, and send switching signal in the docking time section and opened to described first Close, control the first switch to close a floodgate；Wherein 0≤T≤0.01s；
The second switch is used to control whether to access voltage difference envelope line detector；The first switch, which is provided with, to be used for and ship The first group of contact point and second group of contact point for being connected with bank electricity transformer of electrical connection；The voltage difference envelope detection First group of input of device is connected with first group of contact point；Second group of input of the voltage difference envelope line detector End is connected by the second switch with second group of contact point.
8. ship according to claim 7 connects bank electricity system, it is characterised in that：First power supply module also includes parallel connection The first phase sequence switch and the second phase sequence switch；Ship electricity A phase, B phase, C phase respectively by the first phase sequence switch, first switch with The output end U phases of bank electricity transformer, V phases, W are connected；The control assembly also includes detection device for phase sequence；The Phase sequence detection A phase, B phase, C phase of the device one end respectively with ship electricity is connected, other end output end U phases, V phases, the W phases with bank electricity transformer respectively Connection, to detect ship electricity, whether phase sequence is consistent with bank electricity：If phase sequence is consistent, the first phase sequence switch is closed；If phase sequence is inconsistent, Then close the second phase sequence switch；
The voltage difference envelope line detector includes voltage difference and obtains circuit, absolute value change-over circuit and shaping detecting circuit； Two inputs that the voltage difference obtains circuit are connected in parallel on the both ends of the first switch respectively, and obtain ship electricity and the electricity of bank electricity Pressure difference envelope signal；The output end that the voltage difference obtains circuit is connected with the input of the absolute value change-over circuit, and The voltage difference envelope signal is sent to the absolute value change-over circuit；The output end of the absolute value change-over circuit with it is described The input connection of shaping detecting circuit, and after voltage difference envelope signal is converted into forward voltage difference envelope signal, pass It is sent to the shaping detecting circuit；The shaping detecting circuit carries out detection processing to voltage difference envelope signal, and is converted to After periodically positive fluctuating signal, the control assembly is sent to；
The control assembly includes single-chip microcomputer and industrial computer；The input of the single-chip microcomputer is examined with the voltage difference envelope The output end connection of device is surveyed, and the positive fluctuating signal of the periodicity is sampled and filtered, and with the periodically positive arteries and veins Point setting docking time section on the basis of the minimum point of dynamic signal, sends to the industrial computer in the docking time section and docks Signal；The industrial computer sends energization control signal to the first switch, the first switch according to the docking signal Receive the energization control signal and close a floodgate；
The voltage difference, which obtains circuit, includes one group of Hall voltage sensor component；The Hall voltage sensor component includes the One divider resistance, the second divider resistance, the first Hall voltage sensor and the first measurement resistance；The first Hall voltage sensing The first input end of device is connected by first divider resistance with the first make contact of the first switch；First Hall Second input of voltage sensor is connected by second divider resistance with the second contact point of the second switch, and institute State the phase voltage that the first Hall voltage sensor obtains ship electricity by the first input end and second input respectively And bank electricity one phase voltage corresponding with the phase voltage of ship electricity, and then obtain phase ship electricity and the voltage difference envelope of bank electricity Signal；The output end of first Hall voltage sensor is connected with the input of the absolute value change-over circuit, and passes through institute State the first measurement resistance eutral grounding；
First power supply module also includes the accurate frequency table being arranged on ship power distribution device, and the accurate frequency table is used for Surveying vessel electricity frequency, and the ship electricity frequency measured according to the accurate frequency table, manually or automatically adjust engine throttle, to adjust Ship electricity frequency is saved, makes ship electricity frequency lower 0.1Hz-0.5Hz than bank electricity frequency, then enters the docking of navigate electricity and bank electricity.
9. ship according to claim 6 connects bank electricity system, it is characterised in that：Also include central processing module, the first confession Electric module；The central processing module receives the selection result of judge module, if selection state follows smooth-switching method to connect bank Electricity, then notify the second power supply module；
Second power supply module includes bank electricity transformer, rectification adverser, 50Hz circuits, 60Hz circuits, common line, inner ring Controller and outer ring controller, the outer ring controller include V/f controllers, P/Q controllers and pll controller；
The bank electricity transformer, rectification adverser, 50Hz circuits, common line are sequentially connected, bank electricity transformer, commutation inversion Device, 60Hz circuits and common line are sequentially connected, 50Hz the or 60Hz circuits select according to the ship electricity power distribution information；Bank electricity The transformer other end is used to be connected with shore electric power, and the common line other end is used to electrically connect with ship；
The V/f controllers, the target frequency for making marine generator are converted to the target frequency of bank electricity transformer output；
The P/Q controllers, it is real with ship electricity for after V/f controllers are disposed, controlling marine generator frequency and voltage When load power be target power, carry out power transfer, rectification adverser power output increase, under marine generator power output Drop, when marine generator power output drop to predetermined power or it is following when, marine generator close；
The pll controller is used for frequency and the voltage for controlling rectification adverser to export.
10. ship according to claim 9 connects bank electricity system, it is characterised in that：The 50Hz circuits include the 6th switch, 7th switch, the first inductance, the second inductance, the 4th inductance and the first electric capacity；The 60Hz circuits include the 8th switch, the 3rd electricity Sense, the 5th inductance and the second electric capacity；The common line includes the 4th resistance, the 6th inductance and the 9th switch；
One end of bank electricity transformer is used to connect shore electric power, one end of another termination rectification adverser and the 6th switch, rectification The other end of inverter connects one end of the 7th switch and the 8th switch respectively；The other end of 6th switch connects after concatenating the first inductance Connect the 7th switch the other end, the 7th switch the other end connect the second inductance the first connection end, the second of the second inductance Connection end is sequentially connected in series one end of the 4th inductance, the 4th resistance, the 6th inductance and the 9th switch, and one end of the first electric capacity is connected to Between second inductance and the 4th inductance, its other end ground connection；The other end of 8th switch connects the first connection end of the 3rd inductance, The second connection end of 3rd inductance is sequentially connected in series one end of the 5th inductance, the 4th resistance, the 6th inductance and the 9th switch, the second electricity One end of appearance is connected between the 3rd inductance and the 5th inductance, its other end ground connection；The other end of 9th switch is used for and ship electricity Connection；
The predetermined power is 5% marine generator rated power.
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CN108493934A (en) * 2018-04-16 2018-09-04 苏州英威腾电力电子有限公司 A kind of shore electric power system and its shore electric power control method and device
CN110048615A (en) * 2019-04-23 2019-07-23 上海辛格林纳新时达电机有限公司 High voltage shore power power supply inhibits control method and its device against function
CN111953068A (en) * 2019-05-17 2020-11-17 台达电子工业股份有限公司 Power conversion system and method of operating the same
CN116667447A (en) * 2023-05-17 2023-08-29 广州航海学院 Automatic grid-connected system
CN117748523A (en) * 2023-12-20 2024-03-22 广州航海学院 Wireless intelligent control multi-berth comprehensive power supply shore power system

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