CN201315548Y - A high power ship shore power supply - Google Patents
A high power ship shore power supply Download PDFInfo
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- CN201315548Y CN201315548Y CN 200820174608 CN200820174608U CN201315548Y CN 201315548 Y CN201315548 Y CN 201315548Y CN 200820174608 CN200820174608 CN 200820174608 CN 200820174608 U CN200820174608 U CN 200820174608U CN 201315548 Y CN201315548 Y CN 201315548Y
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- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
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Abstract
The utility model discloses a high power ship shore power supply which comprises a power grid high-voltage three-phase ac input end, a power supply high-voltage three-phase ac output end and an inverter system; the inverter system is a high-voltage inverter system; the input end of the high-voltage inverter system is connected with the power grid high-voltage three-phase ac input end for directly performing rectification and inversion towards high voltage electricity inputted from the power grid three-phase ac input end; meanwhile, high voltage three-phase ac electricity is outputted by the power supply high-voltage three-phase ac output end; thereby, the intermediate conversion stage is reduced; the power factor of power supply and the product reliability are improved.
Description
Technical field
The utility model relates to a kind of shore electric power of giving the ship power supply that rests against port and pier, specifically, relates to a kind of power-supply device of high-power frequency conversion, belongs to the power supply technical field.
Background technology
Large ship uses fuel oil goods (mostly being heavy oil and diesel oil) generating when particularly oil carrier and container ship reach port usually, satisfies the boats and ships need for electricity.Fuel oil such as heavy oil and diesel oil goods produce a large amount of sulfide and nitrogen oxide in combustion process, surrounding enviroment are caused severe contamination, pollute the back and can be transmitted to several hundred kilometers area in addition by the weather effect.And the lot of domestic and international harbor district all concentrates on the urban district, and stopping the harbour to the port boats and ships, to produce the contradiction of polluting with the inner city environmental protection more and more outstanding.If adopt the land electrical network,, has crucial meaning undoubtedly for protection harbor district environment, the pleasant green harbour of construction cleaning to the ship power supply that reaches port.
Present domestic mains supply is 50Hz, and external ship power supply power supply is 60Hz, if adopt the land mains supply, the harbour has a strong impact on different certainly will the causing marine electric installation of ship power supply electricity system.For large vessel, various electric equipments are bigger to workload demand on the ship, with 3000KVA is example, for satisfying the power demands of land electrical network to the boats and ships that reach port, the someone has proposed a kind of low-pressure high-power shore electric power scheme, and its principle is to adopt the high-tension electricity of electrical network three-phase 50Hz transformer to be depressurized to 380V/50Hz earlier, import the low pressure shore electric power then, through low pressure inversion system commutation inversion is 60Hz output, and then after power transformer boosts to high pressure 60Hz, gives the ship power supply that reaches port.This low pressure bank electricity power supply technique exists following shortcoming: 1, in low pressure bank power technology; large power inverter power source all adopts the mode of small-power inverter module parallel connection to realize; for capacity up to the number megawatts shore electric power for; require inversion module in parallel numerous; the fault of any one module; all make shore electric power derate to use, even shut down.And because the complexity of boats and ships load often needs the band heavy-duty motor directly to start, strong to power surges, therefore, low pressure inversion scheme reliability reduces greatly; 2, in the low pressure shore electric power technology, the power supply input side needs the step-down transformer step-down, need sinusoidal wave filtering after the inversion, just can obtain high voltage after also will boosting at last through step-up transformer, and the ascending, descending pressure transformer generally adopts power transformer, and it is most effective to be 95%, sine wave filter efficient 90%, make the power supply overall efficiency be up to 85%, greatly reduce system effectiveness; 3, general 6 impulse commutations that adopt of low pressure inversion transformation technique, input power factor is low, will form bigger pollution to electrical network; 4, in the low pressure bank power technology, for the shore electric power of capacity up to the number megawatt, its specified input current is thousands of amperes, has brought very big difficulty for the design of input and output side distribution.
Summary of the invention
The above-mentioned shortcoming that the utility model exists at prior art mesolow large power ship shore electric power, a kind of large power ship shore electric power is provided, described shore electric power adopts high voltage inverter system, directly the high-tension electricity with the input of electrical network three-phase alternating current carries out rectification and inversion, export the high pressure three-phase alternating current then, reduce the intermediate conversion link, improved power factor and product reliability.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of large power ship shore electric power comprises electrical network high pressure three-phase alternating current input, power supply high pressure three-phase alternating current output and inversion system; Described inversion system is a high voltage inverter system, the input of described high voltage inverter system connects described electrical network high pressure three-phase alternating current input, the high-tension electricity of electrical network three-phase alternating current input is directly carried out rectification and inversion, and by described power supply high pressure three-phase alternating current output output high pressure three-phase alternating current.
According to the utility model, described high voltage inverter system comprises phase shifting transformer, power unit module and control system; The elementary winding of described phase shifting transformer connects the input of electrical network high pressure three-phase alternating current, and its secondary winding is connected with the input of described power unit module; After described power unit module is imported electric rectification, inversion with the high pressure three-phase alternating current, output high pressure three-phase alternating current; Described control system connects the control end of described power unit module, and output pwm control signal to described control end is controlled described power unit module.
According to the utility model, described power unit module is made up of 24 power cells, and every cross streams electricity includes 8 power cells of series connection mutually, and the input of each power cell is connected with the secondary winding of phase shifting transformer respectively; The output of the power cell that whenever is in series adopts the Y type to connect back output high pressure three-phase alternating current.
According to the utility model, described phase shifting transformer is two, and each phase shifting transformer has 12 secondary winding; The input of each power cell is connected with one of them secondary winding of phase shifting transformer respectively.Preferably, the secondary winding of described phase shifting transformer adopts the extend-triangle connection, to realize multipleization, reduces the input current harmonics composition.
According to the utility model, the input of described power cell is connected with the three-phase full wave rectifier circuit that diode is formed, described rectifier is rectified into direct current with the high pressure three-phase alternating current of described power cell input input, described direct current is after the dc filter capacitor filtering in parallel with described rectifier, transfer to single-phase full-bridge inverter, described inverter carries out inversion with direct current under the pwm control signal control of described control system output, and by power cell output output single-phase alternating current; Be parallel with the bypass that controllable silicon is formed at described power cell output.
According to the utility model, the pwm control signal of described control system output is transmitted through the fiber to the control end of described power unit module after photoelectric isolating circuit is isolated.
According to the utility model, the output of described high voltage inverter system is connected with testing circuit, and the signal output part of described testing circuit connects described control system; Described testing circuit detects the current signal of high voltage inverter system output, and described current signal is transferred to described control system, and described control system is according to the output of the described high voltage inverter system of electric current transmitted Signal Regulation.
According to the utility model, for reducing the insulation damages of power supply to power consumption equipment, the output of described high voltage inverter system also is connected with high voltage reactor; Be connected with the plug of power supply boats and ships for ease of shore electric power, described power supply high pressure three-phase alternating current output is provided with the high voltage source connector.
Compared with prior art, advantage of the present utility model and good effect are:
1, large power ship shore electric power employing high voltage inverter system described in the utility model is directly carried out rectification and inversion with the high-tension electricity of electrical network three-phase alternating current input, and output high pressure three-phase alternating current, do not need ascending, descending pressure transformer and sine wave filter in the low pressure inversion system, reduced the intermediate conversion link, make loss, volume, the weight of power supply all reduce, cost reduces, and has improved product reliability.
2, the power supply high voltage inverter system adopts Redundancy Design, whenever includes 8 power cells that are in series mutually, and each power cell has the bypass side that controllable silicon is formed.When certain power cell broke down, the power supply master control system can be carried out the power cell that breaks down the bypass excision at short notice, and recomputates output waveform, keeps the complete of output voltage waveforms.Because each power cell structure is identical, can exchange, not only be convenient to the debugging maintenance, and backup is convenient economical.
3, the high voltage inverter system input adopts two phase shifting transformer power supplies with 12 secondary winding, adopt 24 impulse commutation modes, improved the current waveform of grid side, reduced the Harmonics of Input composition, improved power factor, made grid side power factor under the load near 1.
4, adopt the multichannel light fiber communication between control system in the high voltage inverter system and the power unit module, realized the real electrical isolation of high-pressure section and low-pressure section, improved the fail safe and the reliability of power-supply system, and the system that makes has good anti-electromagnetic interference capability.
5, realize the closed loop feedback voltage stabilizing of shore electric power by testing circuit is set, improved the stability of output voltage.
Description of drawings
Fig. 1 is the theory diagram of the utility model large power ship shore electric power;
Fig. 2 is the theory diagram of Fig. 1 mesohigh inversion system;
Fig. 3 is the circuit diagram of power cell among Fig. 2;
Fig. 4 is that pwm control signal is isolated input circuit figure in the utility model shore electric power.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Consult shore electric power theory diagram shown in Figure 1, shore electric power described in the utility model is to adopt the land electrical network to give the power supply of the boats and ships that reach port, the ship power supply that reaches port that especially load is bigger.Described shore electric power comprises input switch K1, high voltage inverter system 1 and output K switch 2, is in series with high voltage reactor L at the output of high voltage inverter system 1.Harbor district transformer station carries out secondary distribution to the electric energy of land 50Hz, by step-down transformer high pressure 20-100KV voltage is reduced; Then, the input of the 50Hz electrical network high-voltage alternating after the step-down is transported to the input of shore electric power by cable.Closing Switch K1 and K switch 2, the input of electrical network high-voltage alternating inputs in the described high voltage inverter system 1 by K switch 1, after high voltage inverter system 1 rectification, inversion, output three-phase quasi-sine-wave.Described three-phase quasi-sine-wave after high voltage reactor L filtering, obtains the sinusoidal high voltage of three-phase 60Hz again, and through 2 outputs of output K switch.Be connected with the plug of power supply boats and ships for ease of shore electric power, output at described shore electric power also is connected with the high voltage source connector, on described high voltage source connector, be connected with the cable that leads to the boats and ships that reach port, the sinusoidal high voltage of the 60Hz of shore electric power output is transported on the boats and ships that reach port by high voltage source connector and cable, gives the boats and ships electric.
The utility model has been introduced the closed loop feedback unit for improving the stability of electric power output voltage in high-voltage inverted field.Be specially: exchange outlet side at power supply and be connected with testing circuit, described testing circuit detects the load current of output in real time, then current signal is fed back in the described high voltage inverter system 1, high voltage inverter system 1 reaches the purpose of control output voltage stability according to the output of the size adjustment power supply of the electric current of testing circuit feedback.By the closed loop feedback unit that above-mentioned testing circuit constitutes is set, the stable state regulation of output voltage is reached ± 2%.
In large power ship shore electric power, high voltage inverter system 1 is the core of power supply, and Fig. 2 shows the theory diagram of high voltage inverter system 1.Described high voltage inverter system 1 comprises phase shifting transformer, power unit module and control system.Described phase shifting transformer is two, and each all has 12 secondary winding, and two transformers have 24 secondary winding, and secondary winding adopts the extend-triangle connection.Power unit module comprises 24 power cells that structure is identical, whenever should have 8 relatively, and 8 power cells of every phase are connected mutually; The output serial connection of the power cell of adjacent phase forms the output of " Y " type structure.The input of each power cell is connected with a secondary winding of described phase shifting transformer respectively, and the elementary winding of phase shifting transformer connects the input of electrical network high pressure three-phase alternating current.Control system comprises controller, man-machine interface and Programmable Logic Controller (PLC).Described controller adopts high speed processor, and power cell is sent pwm control signal, and by its internal algorithm, guarantees that power supply institute reaches the runnability of optimum with inductive load.Described Programmable Logic Controller is used for each switching signal of power supply is carried out logical process and coordinated on-the-spot each operation signal and status signal, to strengthen the flexibility of electric supply system.And man-machine interface provides friendly monitoring and operation interface, also can realize remote monitoring and networking control simultaneously.To the power cell power supply, power cell carries out rectification, inversion to line voltage to line voltage under the control of the pwm control signal that controller sends, finally export the high pressure three-phase alternating current of 60Hz after the phase shifting transformer step-down.
In addition, described controller has the independent control power supply that a cover is independent of high voltage source, under situation about not adding high pressure, only adds independent control power supply, the waveform of system's each point is similar substantially when adding high pressure, and brings great convenience property and fail safe for machine debugging, maintenance and training.
Fig. 3 shows the circuit diagram of above-mentioned power cell, and described power cell comprises three-phase full wave rectifier circuit 11 and the single-phase full-bridge inverter 12 that six diodes are formed, and is parallel with dc filter capacitor C1 and C2 at the two ends of described rectifier 11.Three-phase input R, S after the phase shifting transformer step-down, T are rectified into direct current through rectifier 11, and reach in the inverter 12 after capacitor C 1 and C2 filtering.The inverter 12 pwm control signal control how controller is exported is exported single-phase alternating current UV down with dc inverter.Single-phase output at power cell also is parallel with the bypass that controllable silicon K forms, if certain power cell breaks down, the output of this unit can pass through the controllable silicon bypass automatically, can not influence the continuous operation of power supply complete machine, has improved the reliability of power work.
See also pwm control signal shown in Figure 4 and isolate input circuit figure, the utility model shore electric power is for realizing the high-tension electricity and the electrical isolation of low tension truly, employing multichannel light fiber communication between control system and the power cell.3 pin of pwm control signal SINEDRV input photoelectric isolating circuit U4, the pwm signal after the isolation is exported by 5 pin and 6 pin of U4, and then is transmitted through the fiber to the power cell control end, thereby has improved the fail safe and the reliability of power-supply system.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1, a kind of large power ship shore electric power, comprise electrical network high pressure three-phase alternating current input, power supply high pressure three-phase alternating current output and inversion system, it is characterized in that, described inversion system is a high voltage inverter system, the input of described high voltage inverter system connects described electrical network high pressure three-phase alternating current input, the high-tension electricity of electrical network three-phase alternating current input is directly carried out rectification and inversion, and by described power supply high pressure three-phase alternating current output output high pressure three-phase alternating current.
2, large power ship shore electric power according to claim 1 is characterized in that, described high voltage inverter system comprises phase shifting transformer, power unit module and control system; The elementary winding of described phase shifting transformer connects the input of electrical network high pressure three-phase alternating current, and its secondary winding is connected with the input of described power unit module; After described power unit module is imported electric rectification, inversion with the high pressure three-phase alternating current, output high pressure three-phase alternating current; Described control system connects the control end of described power unit module, and output pwm control signal to described control end is controlled described power unit module.
3, large power ship shore electric power according to claim 2, it is characterized in that, described power unit module is made up of 24 power cells, and every cross streams electricity includes 8 power cells of series connection mutually, and the input of each power cell is connected with the secondary winding of phase shifting transformer respectively; The output of the power cell that whenever is in series adopts the Y type to connect back output high pressure three-phase alternating current.
4, large power ship shore electric power according to claim 3, it is characterized in that, described phase shifting transformer is two, and each phase shifting transformer has 12 secondary winding, and the input of each power cell is connected with one of them secondary winding of phase shifting transformer respectively.
5, large power ship shore electric power according to claim 4 is characterized in that, the secondary winding of described phase shifting transformer adopts the extend-triangle connection.
6, large power ship shore electric power according to claim 3, it is characterized in that, the input of described power cell is connected with the three-phase full wave rectifier circuit that diode is formed, described rectifier is rectified into direct current with the high pressure three-phase alternating current of described power cell input input, described direct current is after the dc filter capacitor filtering in parallel with described rectifier, transfer to single-phase full-bridge inverter, described inverter carries out inversion with direct current under the pwm control signal control of described control system output, and by power cell output output single-phase alternating current; Be parallel with the bypass that controllable silicon is formed at described power cell output.
7, large power ship shore electric power according to claim 2 is characterized in that, the pwm control signal of described control system output is transmitted through the fiber to the control end of described power unit module after photoelectric isolating circuit is isolated.
8, according to each described large power ship shore electric power in the claim 2 to 7, it is characterized in that the output of described high voltage inverter system is connected with testing circuit, the signal output part of described testing circuit connects described control system; Described testing circuit detects the current signal of high voltage inverter system output, and described current signal is transferred to described control system, and described control system is according to the output of the described high voltage inverter system of electric current transmitted Signal Regulation.
9, large power ship shore electric power according to claim 8 is characterized in that, the output of described high voltage inverter system is connected with high voltage reactor.
10, large power ship shore electric power according to claim 1 is characterized in that, described power supply high pressure three-phase alternating current output is provided with the high voltage source connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820174608 CN201315548Y (en) | 2008-10-29 | 2008-10-29 | A high power ship shore power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200820174608 CN201315548Y (en) | 2008-10-29 | 2008-10-29 | A high power ship shore power supply |
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| CN201315548Y true CN201315548Y (en) | 2009-09-23 |
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| CN 200820174608 Expired - Lifetime CN201315548Y (en) | 2008-10-29 | 2008-10-29 | A high power ship shore power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253695A (en) * | 2016-08-05 | 2016-12-21 | 山东沃森电源设备有限公司 | The high-power shore electric power of Intelligent monitoring type |
| CN107134781A (en) * | 2016-02-29 | 2017-09-05 | 上海港蓝环保科技有限公司 | A kind of high pressure constant frequency pressure regulating regulated power supply system |
| CN107134782A (en) * | 2016-02-29 | 2017-09-05 | 上海港蓝环保科技有限公司 | A kind of high pressure constant frequency pressure regulating regulated power supply system provided with intelligence control system |
| CN110926037A (en) * | 2019-12-12 | 2020-03-27 | 中山市上航电子有限公司 | Voltage regulation control method of high-power water heater compatible with EMC |
-
2008
- 2008-10-29 CN CN 200820174608 patent/CN201315548Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134781A (en) * | 2016-02-29 | 2017-09-05 | 上海港蓝环保科技有限公司 | A kind of high pressure constant frequency pressure regulating regulated power supply system |
| CN107134782A (en) * | 2016-02-29 | 2017-09-05 | 上海港蓝环保科技有限公司 | A kind of high pressure constant frequency pressure regulating regulated power supply system provided with intelligence control system |
| CN106253695A (en) * | 2016-08-05 | 2016-12-21 | 山东沃森电源设备有限公司 | The high-power shore electric power of Intelligent monitoring type |
| CN110926037A (en) * | 2019-12-12 | 2020-03-27 | 中山市上航电子有限公司 | Voltage regulation control method of high-power water heater compatible with EMC |
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Granted publication date: 20090923 |