CN111740636B - Bidirectional inverter and remote charging and discharging maintenance system - Google Patents
Bidirectional inverter and remote charging and discharging maintenance system Download PDFInfo
- Publication number
- CN111740636B CN111740636B CN202010609299.6A CN202010609299A CN111740636B CN 111740636 B CN111740636 B CN 111740636B CN 202010609299 A CN202010609299 A CN 202010609299A CN 111740636 B CN111740636 B CN 111740636B
- Authority
- CN
- China
- Prior art keywords
- switch
- battery pack
- normally
- charging
- bidirectional inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 51
- 238000007599 discharging Methods 0.000 title claims abstract description 33
- 238000012423 maintenance Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004397 blinking Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a bidirectional inverter, which comprises a micro-control module, an MPPT controller, an SPWM signal generator, a DC/DC converter, a DC/AC converter, a switch TY1 and a switch TY2, wherein the MPPT controller is connected with the MPPT controller through a bus; the micro-control module is connected to the control mainboard, the load unit and the charging unit. The invention also provides a remote charging and discharging maintenance system, which comprises a control mainboard, a feedback type power supply module and a central monitoring platform; the feedback type power supply module comprises a bidirectional inverter, and a load unit and a charging unit which are electrically connected with the bidirectional inverter. The bidirectional inverter can greatly save the working load of the bidirectional inverter. Through the remote charging and discharging maintenance system, when a worker needs to carry out remote maintenance and detection on the battery pack, the remote charging and discharging maintenance system can interact with the central monitoring platform, and the worker can conveniently check the charging and discharging condition of the battery and the working state of external commercial power in real time.
Description
Technical Field
The invention relates to the technical field of storage battery application, in particular to a bidirectional inverter and a remote charging and discharging maintenance system.
Background
With the rapid development and increasing demand of information technology, the number of communication rooms and base stations is rapidly increasing. Meanwhile, the communication machine room and the base station are basically unattended, and the wireless terminal equipment can be separated from direct contact of workers for a long time and operates in an automatic charging and discharging mode. In the process, as no working personnel check the working condition of the storage battery for a long time, the wireless terminal devices can operate mistakenly without being perceived by people, if the storage battery works abnormally after the mains supply is powered off, the circuit or the device can be damaged, meanwhile, the function of the whole system can be influenced, some important data are lost, and great examination is brought to a power maintenance system of a communication machine room and a base station. Therefore, under the condition of insufficient manpower, how to more effectively manage and maintain the backup power supplies of the communication machine room and the base station becomes a problem to be solved urgently.
Disclosure of Invention
The invention provides a bidirectional inverter, which comprises a micro-control module, an MPPT controller, an SPWM signal generator, a DC/DC converter, a DC/AC converter, a switch TY1 and a switch TY2, wherein the MPPT controller is connected with the MPPT controller through a bus; the micro-control module is electrically connected with the DC/DC converter through a switch TY1 and an MPPT controller, and is electrically connected with the DC/AC converter through a switch TY2 and an SPWM signal generator; the DC/DC converter is electrically connected with the DC/AC converter; the DC/DC converter is also connected to a battery pack; the DC/AC converter is also connected to the external mains.
The invention also provides a remote charging and discharging maintenance system, which comprises a control mainboard, a feedback type power supply module and a central monitoring platform; the feedback type power supply module comprises the bidirectional inverter, and a load unit and a charging unit which are electrically connected with the bidirectional inverter; the bidirectional inverter is electrically connected with the control main board; the control main board is in communication connection with the central monitoring platform so as to receive a control instruction sent by the central monitoring platform and control the bidirectional inverter to perform alternating current-direct current conversion, and further switch the charging and discharging states of the battery pack; the charging unit and the load unit control the charging or discharging of the battery pack through the bidirectional inverter; the charging unit is also connected with an external commercial power to obtain a power supply.
In a DC/DC link, the micro-control module controls a switch TY1 to be closed and controls a switch TY2 to be disconnected, so that the maximum power point tracking of the battery is realized; in a DC/AC link, the micro-control module controls the control switch TY1 to be switched off and controls the switch TY2 to be switched on, so that the output current and the mains supply voltage are ensured to be in the same frequency and phase. By the switching mode, electronic devices of the DC/AC link are not needed to be in a consumption state in the DC/DC link, and vice versa, the working load of the bidirectional inverter can be greatly saved, the bidirectional inverter is in an optimal working state, and the working life of the bidirectional inverter is prolonged to the maximum extent.
Through the remote charging and discharging maintenance system, when a worker needs to carry out remote maintenance and detection on the battery pack, the remote charging and discharging maintenance system can interact with a central monitoring platform. The control mainboard controls the bidirectional inverter to perform alternating current-direct current conversion, so that the battery pack is discharged through the load unit or is charged through the charging module. During the discharging process of the battery pack, the battery parameter measuring unit detects the operating parameters of the battery pack, such as the current magnitude, the voltage magnitude, the ambient temperature, and the like, and the battery parameter measuring instrument sends the detected battery parameter information to the control mainboard. Can set up the parameter threshold value in the control mainboard, when the battery parameter information that the control mainboard was received exceeded the parameter threshold value, the control mainboard stopped to charge to the group battery through two-way inverter control module of charging, and the control mainboard feeds back battery parameter information simultaneously and gives central monitoring platform, and the staff can more conveniently look over and overhaul. In the battery pack charging process, the commercial power sampling unit further detects the commercial power state information of the external commercial power, whether the commercial power is disconnected or not is conveniently detected, meanwhile, the commercial power state information is sent to the control mainboard, the control mainboard sends the commercial power state information to the central monitoring platform, and the working state of the external commercial power is conveniently checked by a worker in real time.
Drawings
Fig. 1 is a schematic diagram of a structure of a bidirectional inverter according to a first embodiment of the invention;
fig. 2 is a schematic structural diagram of a remote charge and discharge maintenance system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control motherboard according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present invention have not been shown or described in the specification in order to avoid obscuring the present invention from the excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they can be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified.
The first embodiment is as follows:
as shown in fig. 1, the bidirectional inverter 201 of the present embodiment includes a micro-control module 211, an MPPT controller 212, an SPWM signal generator 214, a DC/DC converter 213 and a DC/AC converter 215, the micro-control module 211 is used for connecting to the control main board 101, the load unit 202 and the charging unit 203, and is also electrically connected to the DC/DC converter 213 through a switch TY1 and the MPPT controller 212, and is electrically connected to the DC/AC converter 215 through a switch TY2 and the SPWM signal generator 214; the DC/DC converter 213 is electrically connected to the DC/AC converter 215; a DC/DC converter 213 for connection to the battery pack; the DC/AC converter 215 is for connection to the external mains.
The mppt (maximum Power Point tracking) controller, i.e., the maximum Power Point tracking solar controller, adopted in this embodiment is an upgraded product of the conventional solar charging and discharging controller. The MPPT controller can detect the generated voltage of the solar panel in real time and track the maximum voltage current Value (VI), so that the system charges the storage battery at the maximum power output. The solar photovoltaic system is applied to a solar photovoltaic system, coordinates the work of a solar cell panel, a storage battery and a load, and is the brain of the photovoltaic system.
An spwm (sinusoidal Pulse Width modulation) signal generator, i.e., a sine wave Pulse Width modulation waveform signal generator, the sine Pulse Width modulation method is a mature one, and a PWM method is widely used at present. The SPWM signal generator can cut the direct current electric energy into a pulse sequence with equal amplitude and width changing according to a sine rule in one period of the alternating current electric energy output by the inverter. The SPWM method uses the PWM waveform with the pulse width changing according to the sine wave rule and equivalent to the sine wave, namely the SPWM waveform controls the on-off of the switching element, so that the area of the output pulse voltage is equal to the area of the sine wave expected to be output in the corresponding interval, and the frequency and the amplitude of the output voltage are adjusted by changing the frequency and the amplitude of the modulation wave. The method is widely applied to the fields of motor control, UPS, inverters, intelligent families, clean energy and the like. In a specific embodiment, the SPWM signal generator generates a PWM signal through a HT1215 single-phase voltage-stabilizing pure sine wave inverter chip to drive a single-phase full bridge to conduct.
The micro-control module can adopt an Atmega16 singlechip, a dsPIC singlechip or a DSP microprocessor, such as a TMS320F2808 processor, and is used for photovoltaic array detection, parallel grid detection and grid voltage synchronous detection.
In a DC/DC link, the micro-control module 211 controls the switch TY1 to be closed and controls the switch TY2 to be opened, so that the maximum power point tracking of the battery is realized. In a DC/AC link, the micro-control module 211 controls the control switch TY1 to be switched off and controls the switch TY2 to be switched on, so that the output current and the mains voltage are ensured to be in the same frequency and phase.
Power supplies can be divided into two broad categories, AC/DC and DC/DC. DC/DC conversion is the conversion of a fixed DC voltage into a variable DC voltage, also called DC ripple. The DC/AC realizes the conversion from direct current electric energy to alternating current electric energy, and can obtain alternating current electric energy with higher quality and meeting the requirements of loads on voltage and frequency by converting the direct current electric energy from storage batteries, solar cells and the like.
In a specific embodiment, the DC/DC converter may convert the DC power output by the battery into 300-400V DC power, for example, to Boost the chopped current; the DC/AC converter may be, for example, a single-phase full-bridge inverter circuit that inverts DC power into 220V/50Hz AC power. The Boost chopper current can regulate the output voltage of the storage battery within a limited range, so that the storage battery has the maximum power output.
The initial direct current output from the battery pack is converted into a direct current of a predetermined power/voltage by the DC/DC converter 213, and the direct current is inverted into an alternating current of a predetermined power by the DC/AC converter 215, so that the bidirectional inverter 201 can convert the alternating current from the external commercial power into a direct current to charge the secondary battery, and convert the direct current of the secondary battery into an alternating current to be discharged to the outside.
Example two:
fig. 2 shows a remote charging and discharging maintenance system of this embodiment, which includes a maintenance host 10, a feedback power module 20, a central monitoring platform 301, a serial server 302, a battery parameter measuring unit, and a utility power sampling unit.
The maintenance host 10 includes a control main board 101, and a control terminal 103 and an indicator light set 102 electrically connected to the control main board 101.
The control mainboard 101 is in communication connection with the central monitoring platform 301 through the serial server 302, so that communication between the control mainboard 101 and the central monitoring platform 301 is realized, and the control mainboard 101 receives a control instruction sent by the central monitoring platform 301. The serial server 302 is provided with a plurality of channels, a plurality of control mainboards can be connected with the serial server, so that a plurality of battery packs equipped with the remote charging and discharging maintenance system can be controlled in a unified manner through one serial server, and the battery packs of the remote charging and discharging maintenance system can be controlled by a worker conveniently.
As shown in fig. 3, the battery pack includes a first battery pack 411 and a second battery pack 412, and any type of storage battery in the prior art can be used, and both the first battery pack 411 and the second battery pack 412 are electrically connected to a bidirectional inverter 201, and the bidirectional inverter 201 controls charging and discharging of the first battery pack 411 and the second battery pack 412.
The battery parameter measuring unit comprises a first battery parameter measuring instrument 401 and a second battery parameter measuring instrument 402, wherein the first battery parameter measuring instrument 401 and the second battery parameter measuring instrument 402 are electrically connected with the control mainboard 101 and are also electrically connected with the first battery pack 411 and the second battery pack 412 respectively so as to detect working parameters of the battery packs and send battery parameter information to the control mainboard 101.
The utility power sampling unit comprises a first utility power sampler 501 and a second utility power sampler 502 which are electrically connected with the control mainboard 101, wherein the first utility power sampler 501 and the second utility power sampler 502 are respectively connected with a first utility power supply 511 and a second utility power supply 512 so as to respectively detect the working states of two utility powers and send the state information of the utility power to the control mainboard 101. Two ways of commercial power are collected by respectively utilizing the first commercial power sampler 501 and the second commercial power sampler 502, so that the accuracy of commercial power monitoring can be increased, the two commercial powers can be detected simultaneously by a worker, the worker can know the working states of the two commercial powers, and subsequent detection and operation are facilitated. The commercial power sampler can adopt an existing C2000A 2-SDD6060-CAX commercial power on-off state detector, so that whether the commercial power is disconnected or not can be conveniently detected.
The control mainboard can adopt a circuit mainboard consisting of the existing main control chip, the wireless communication chip and the peripheral circuit thereof. In one embodiment, as shown in fig. 3, the control board 101 includes: a normally-closed switch ZY1, one end of which is coupled to the first mains supply 511, and the other end is coupled to the first battery pack 411 and the discharge switch WH 1; a normally open switch BY1, one end of the normally open switch BY1 being coupled to one end of the diode D3, and the other end being coupled to the second battery pack 412; a diode D3, the diode D3 being coupled between the normally closed switch ZY1 and the normally open switch BY 1; a normally-closed switch ZY2, one end of which is coupled to the second mains power supply 512, and the other end is coupled to the second battery pack 412 and the charging switch WH 2; a normally open switch BY2, wherein one end of the normally open switch BY2 is coupled to one end of the diode D4, and the other end is coupled to the first battery pack 411; a diode D4, the diode D4 is coupled between the normally closed switch ZY2 and the normally open switch BY 2. One end of a charging switch WH2 is coupled to the bidirectional inverter 201, and the other end is connected to a normally closed switch ZY2 and a normally open switch BY1 to connect or disconnect the bidirectional inverter 201, the power supply and the battery pack to control whether the battery pack is charged or not; one end of a discharge switch WH1 is coupled to the bidirectional inverter 201, and the other end is connected to a normally closed switch ZY1 and a normally open switch BY2 to connect or disconnect the bidirectional inverter 201, the power supply and the battery pack to control whether the storage battery is discharged or not.
Under the condition of power failure of the first commercial power supply 511, the first battery pack 411 may deliver electric power to the electric equipment through a line of the first commercial power through the switch ZY1, at this time, the first commercial power may be switched to supply power to the first battery pack 411, and the first battery pack 411 may also be float-charged under the condition that the first commercial power is powered through the setting of the charging unit 203. Similarly, second mains supply 512 may switch to second battery pack 412 to supply power in the event of a power outage.
The feedback power module 20 includes a bidirectional inverter 201, and a load unit 202 and a charging unit 203 electrically connected thereto. The bidirectional inverter 201 is electrically connected with the control main board 101; the charging unit 203 and the load unit 202 control charging or discharging of the battery pack through the bidirectional inverter 201; the charging unit 203 is also connected to an external commercial power to obtain a power supply.
The control mainboard 101 receives the control instruction and controls the bidirectional inverter 201 to perform alternating current-direct current conversion, so as to switch the charging and discharging states of the battery pack; during the period, when the commercial power state information received by the control main board 101 indicates that the commercial power state is abnormal, the control main board 101 interrupts the charging or discharging of the battery pack through the bidirectional inverter 201; during the period, when the battery parameter information received by the control motherboard 101 indicates that the battery pack charging is completed, the control motherboard 101 interrupts the charging of the battery pack through the bidirectional inverter 201.
In a DC/DC link, the micro-control module 211 controls the switch TY1 to be closed and controls the switch TY2 to be opened, so that the maximum power point tracking of the battery is realized. In a DC/AC link, the micro-control module 211 controls the control switch TY1 to be switched off and controls the switch TY2 to be switched on, so that the output current and the mains voltage are ensured to be in the same frequency and phase.
The control terminal 103 is used for setting a login password, an operation parameter and/or an alarm threshold, and is also used for displaying real-time data and/or historical data.
The indicator lamp provided by the embodiment has two states of normally on and off (or two states of flashing and off). The indicator light group 102 is used for displaying the working state of a certain element in the system, and may be composed of a plurality of indicator lights, for example, part or all of the following indicator lights:
the POW power supply indicator light is always on (or flickers) when the equipment is powered on; when the equipment is powered off, the indicator lamp is turned off;
the RXD communication state indicator lamp is always on (or flickers) when receiving data; when the data is not received, the lamp is indicated to be turned off;
the TXD communication state indicator lamp is always on (or flickers) when sending data; when the data is not sent, the lamp is turned off;
a ZY1 status indicator light, when the normally closed switch ZY1 is closed, the indicator light is normally on (or twinkles); when the normally closed switch ZY1 is switched off, the indicator light is turned off;
a BY1 status indicator light, wherein when the normally open switch BY1 is closed, the indicator light is normally on (or flickers); when the normally open switch BY1 is turned off, the indicator light is turned off;
a ZY2 status indicator light, when the normally closed switch ZY2 is closed, the indicator light is normally on (or twinkles); when the normally closed switch ZY2 is switched off, the indicator light is turned off;
a BY2 status indicator light, wherein when the normally open switch BY2 is closed, the indicator light is normally on (or flickers); when the normally open switch BY2 is turned off, the indicator light is turned off;
a WH1 status indicator light, wherein when the discharge switch WH1 is closed, the indicator light is always on (or flickers); when the discharge switch WH1 is disconnected, the indicator lamp is turned off;
a WH2 status indicator light, wherein when the charging switch WH2 is closed, the indicator light is always on (or flickers); when the charging switch WH2 is turned off, the indicator light is turned off;
an FD state indicator light, wherein when the contactor FD is closed, the indicator light is always on (or flickers); when the contactor FD is disconnected, the indicator light is turned off;
a CD state indicator light, wherein when the contactor CD is closed, the indicator light is always on (or flickers); when the contactor CD is disconnected, the indicator lamp is turned off.
For example, when the ZY2 status indicator light is in a light (or blinking) status, it indicates that the normally closed switch ZY2 has been closed; when the ZY2 status indicator lamp is in the off state, it indicates that the normally closed switch ZY2 is opened.
In one embodiment, the indicator light can be set to have three states of normally on, flashing and light off. The indicator light group 102 is used for displaying whether a certain element in the system is in a normal working state, and may be composed of a plurality of indicator lights, for example, part or all of the following indicator lights:
the POW power supply indicator lamp is normally on when the equipment is normally powered on; when the equipment is normally powered off, the indicator light is turned off; when the equipment is abnormally powered on or powered off, the indicator light flickers;
the RXD communication state indicator lamp is always on when receiving data normally; when the data is not normally transmitted or received, the lamp is indicated to be turned off; when the equipment abnormally receives and transmits data, the indicator light flickers;
the TXD communication state indicator lamp is normally on when data is normally transmitted; when the data is not normally transmitted or received, the lamp is indicated to be turned off; when the equipment abnormally receives and transmits data, the indicator light flickers;
the ZY1 status indicator light is normally on when the normally closed switch ZY1 is normally closed; when the normally closed switch ZY1 is normally switched off, the indicator light is turned off; when the normally closed switch ZY1 is abnormally closed or opened (i.e. the normally closed switch ZY1 should perform closing but actually open, and the normally closed switch ZY1 should perform opening but actually close, and the normally closed switch ZY1 is not tightly closed, not fully opened, unstable contact, blocking in obstacles, etc.), the indicator lamp blinks;
the BY1 status indicator light is normally on when the normally open switch BY1 is normally closed; when the normally open switch BY1 is normally opened, the indicator light is turned off; when the normally open switch BY1 is abnormally closed or opened, the indicator light flickers;
the ZY2 status indicator light is normally on when the normally closed switch ZY2 is normally closed; when the normally closed switch ZY2 is normally switched off, the indicator light is turned off; when the normally closed switch ZY2 is abnormally closed or opened, the indicator light flickers;
the BY2 status indicator light is normally on when the normally open switch BY2 is normally closed; when the normally open switch BY1 is normally opened, the indicator light is turned off; when the normally open switch BY2 is abnormally closed or opened, the indicator light flickers;
a WH1 status indicator light, wherein when the discharge switch WH1 is normally closed, the indicator light is normally on; when the discharge switch WH1 is normally disconnected, the indicator light is turned off; when the discharge switch WH1 is abnormally closed or opened, the indicator light flickers;
a WH2 status indicator light, wherein when the charging switch WH2 is normally closed, the indicator light is normally on; when the charging switch WH2 is normally disconnected, the indicator light is turned off; when the charging switch WH2 is abnormally closed or opened, the indicator light flickers;
the FD state indicator lamp is normally on when the FD of the contactor is normally closed; when the contactor FD is normally disconnected, the indicator light is turned off; when the contactor FD is abnormally closed or opened, the indicator light flickers;
the CD state indicator lamp is normally on when the contactor CD is normally closed; when the contactor CD is normally disconnected, the indicator lamp is turned off; when the contactor CD is abnormally closed or opened, the indicator lamp flickers.
Those skilled in the art will understand that the abnormal closing or opening of the electronic devices in the present invention, such as the normally closed switch ZY1, the normally open switch BY1, the normally closed switch ZY2, the normally open switch BY2, the discharging switch WH1, the charging switch WH2, the contactor FD, and the contactor CD, includes the situations that closing should be performed but actually opening, opening should be performed but actually closing, not tightly closing, not sufficiently opening, unstable contact, and blocking an obstacle.
For example, when the ZY2 contactor status indicator lamp is in a normally on state, it indicates that the normally closed switch ZY2 is normally closed; when the ZY2 contactor status indicator lamp is in the light-off state, the normally-closed switch ZY2 is normally opened; when the ZY2 contactor status indicator lamp is in flashing state, it indicates that the normally closed switch ZY2 is performing the closing or opening operation by mistake, or other abnormal condition occurs.
It will be appreciated by those skilled in the art that the switch employed in the present invention may be any type of switching device known in the art, such as a microswitch, a toggle switch, a push-button or push-button switch, etc.
In a DC/DC link, the micro-control module controls a switch TY1 to be closed and controls a switch TY2 to be disconnected, so that the maximum power point tracking of the battery is realized; in a DC/AC link, the micro-control module controls the control switch TY1 to be switched off and controls the switch TY2 to be switched on, so that the output current and the mains supply voltage are ensured to be in the same frequency and phase. By the switching mode, electronic devices of the DC/AC link are not needed to be in a consumption state in the DC/DC link, and vice versa, the working load of the bidirectional inverter can be greatly saved, the bidirectional inverter is in an optimal working state, and the working life of the bidirectional inverter is prolonged to the maximum extent.
The remote charging and discharging maintenance system has the advantages of flexible networking mode, high reliability, good practicability and strong functions, and has high integration level because the hardware is modularized and the software adopts an embedded microprocessor system. The system is a monitoring and maintaining system which is directly oriented to storage batteries in a machine room/base station and the like to carry out data acquisition and processing, and comprises the functions of sampling, data processing, data relaying and the like. The battery pack and the mains supply can be monitored and analyzed in real time, proper processing is carried out, monitoring data are reported to the monitoring platform through the flexible reporting mode, the networking such as the network port and the serial port, a remote adjusting remote control command issued by the platform is received, and the purpose of carrying out remote charging and discharging maintenance on the storage battery without people when the storage battery is not in station is achieved. According to the remote charging and discharging maintenance system, when a worker needs to carry out remote maintenance and detection on the battery pack, the remote charging and discharging maintenance system can interact with the central monitoring platform, the central monitoring platform sends a control instruction to the control main board, the worker can carry out field control through the control terminal, the central monitoring platform and the control terminal can be matched in a mode that the worker can carry out remote maintenance and detection conveniently, and the control terminal can select a liquid crystal display screen for example. The control mainboard controls the bidirectional inverter to perform alternating current-direct current conversion, so that the battery pack is discharged through the load unit or is charged through the charging module. During the discharging process of the battery pack, the battery parameter measuring instrument detects the operating parameters of the battery pack, such as the detected current, voltage, ambient temperature, etc., and sends the detected battery parameter information to the control mainboard. Can set up the parameter threshold value in the control mainboard, when the battery parameter information that the control mainboard was received exceeded the parameter threshold value, the control mainboard stopped to charge to the group battery through two-way inverter control module of charging, and the control mainboard feeds back battery parameter information simultaneously and gives central monitoring platform, and the staff more conveniently looks over the maintenance. In the battery pack charging process, the commercial power collector also detects the commercial power state information of the external commercial power, whether the commercial power is disconnected or not is conveniently detected, the commercial power state information is sent to the control mainboard, the control mainboard sends the commercial power state information to the central monitoring platform, and the working state of the external commercial power is conveniently checked by the working personnel in real time.
Utilize first commercial power state sample thief and second commercial power sample thief to gather two way commercial powers, can increase the accuracy of commercial power control, also make things convenient for the staff to detect two commercial powers simultaneously, and then make things convenient for the staff to learn the operating condition of two commercial powers, convenient follow-up detection and operation.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (4)
1. A remote charging and discharging maintenance system is characterized by comprising a control main board (101), a feedback type power supply module (20) and a central monitoring platform (301);
the feedback type power supply module (20) comprises a bidirectional inverter (201), and a load unit (202) and a charging unit (203) which are electrically connected with the bidirectional inverter; the bidirectional inverter (201) is electrically connected with the control main board (101);
the bidirectional inverter (201) comprises a micro-control module (211), an MPPT controller (212), an SPWM signal generator (214), a DC/DC converter (213), a DC/AC converter (215), a switch TY1 and a switch TY 2;
the micro-control module (211) is electrically connected with the DC/DC converter (213) through a switch TY1 and an MPPT controller (212), and is electrically connected with the DC/AC converter (215) through a switch TY2 and an SPWM signal generator (214); the DC/DC converter (213) is electrically connected with the DC/AC converter (215); the DC/DC converter (213) is also connected to a battery pack; the DC/AC converter (215) is also connected to an external mains;
the DC/DC converter (213) converts the initial direct current output by the battery pack into direct current with preset power/voltage; the DC/AC converter (215) inverts the direct current into an alternating current with preset power;
the micro-control module (211) controls a switch TY1 to be closed and a switch TY2 to be opened so as to realize the maximum power point tracking of the battery;
in the DC/AC link, the micro-control module (211) controls the switch TY1 to be switched off and controls the switch TY2 to be switched on, so that the output current and the mains voltage are ensured to be in the same frequency and phase;
the control main board (101) is in communication connection with the central monitoring platform (301) so as to receive a control instruction sent by the central monitoring platform (301) and control the bidirectional inverter (201) to perform alternating current-direct current conversion, and further switch the charging and discharging states of the battery pack;
the charging unit (203) and the load unit (202) control charging or discharging of the battery pack through a bidirectional inverter (201);
the charging unit (203) is also connected with an external commercial power to obtain a power supply;
the battery parameter measuring unit and the commercial power sampling unit are electrically connected with the control main board (101);
the battery parameter measuring unit is electrically connected with the battery pack so as to detect working parameters of the battery pack and send battery parameter information to the control main board (101);
the mains supply sampling unit is connected with an external mains supply to detect the working state of the external mains supply and send mains supply state information to the control main board (101);
when the commercial power state information received by the control main board (101) indicates that the commercial power state is abnormal, the control main board (101) interrupts the charging or discharging of the battery pack through the bidirectional inverter (201); when the battery parameter information received by the control main board (101) indicates that the battery pack is charged, the control main board (101) interrupts the charging of the battery pack through the bidirectional inverter (201);
the battery pack comprises a first battery pack (411) and a second battery pack (412), the first battery pack (411) and the second battery pack (412) are both electrically connected with the bidirectional inverter (201), and the bidirectional inverter (201) controls charging and discharging of the first battery pack (411) and the second battery pack (412);
the battery parameter measuring unit comprises a first battery parameter measuring instrument (401) and a second battery parameter measuring instrument (402), wherein the first battery parameter measuring instrument (401) and the second battery parameter measuring instrument (402) are electrically connected with the control main board (101) and are also electrically connected with the first battery pack (411) and the second battery pack (412) respectively;
a normally-closed switch ZY1, one end of the normally-closed switch ZY1 is coupled to the first mains power supply (511), and the other end is coupled to the first battery pack (411) and a discharge switch WH 1;
a normally open switch BY1, one end of the normally open switch BY1 being coupled to one end of the diode D3, and the other end being coupled to the second battery pack (412);
a diode D3, the diode D3 being coupled between the normally closed switch ZY1 and the normally open switch BY 1;
a normally-closed switch ZY2, one end of which is coupled to the second mains power supply (512), and the other end is coupled to the second battery pack (412) and the charging switch WH 2;
a normally open switch BY2, one end of the normally open switch BY2 is coupled to one end of the diode D4, and the other end is coupled to the first battery pack (411);
a diode D4, the diode D4 being coupled between the normally closed switch ZY2 and the normally open switch BY 2;
one end of the charging switch WH2 is coupled to the bidirectional inverter (201), and the other end is connected with the normally closed switch ZY2 and the normally open switch BY1 to connect or disconnect the bidirectional inverter (201), the power supply and the battery pack so as to control whether the battery pack is charged or not;
one end of the discharge switch WH1 is coupled to the bidirectional inverter (201), and the other end is connected with the normally closed switch ZY1 and the normally open switch BY2 to connect or disconnect the bidirectional inverter (201), the power supply and the battery pack so as to control whether to discharge the storage battery;
commercial power sampling unit including all with first commercial power sample thief (501) and second commercial power sample thief (502) that control mainboard (101) electricity is connected, first commercial power sample thief (501) and second commercial power sample thief (502) respectively with first commercial power supply (511) and second commercial power supply (512) are connected to detect the operating condition to two commercial powers respectively.
2. The system of claim 1, further comprising a control terminal (103) electrically connected to the control motherboard (101);
the control terminal (103) is used for setting a login password, operation parameters and/or an alarm threshold and displaying real-time data and/or historical data.
3. The system of claim 1, further comprising a set of indicator lights (102) electrically connected to the control motherboard (101);
the set of indicator lights (102) comprises at least one indicator light, the indicator light comprising:
the POW power supply indicator lamp is always on when the equipment is powered on;
the RXD communication state indicator lamp is on when receiving data;
the TXD communication state indicator lamp is turned on when sending data;
a ZY1 status indicator light, wherein when the normally closed switch ZY1 is closed, the indicator light is normally on;
the BY1 status indicator light is normally on when the normally open switch BY1 is closed;
a ZY2 status indicator light, wherein when the normally closed switch ZY2 is closed, the indicator light is normally on;
the BY2 status indicator light is normally on when the normally open switch BY1 is closed;
a WH1 status indicator light, wherein when the discharge switch WH1 is closed, the indicator light is normally on;
a WH2 status indicator light, wherein when the charging switch WH2 is closed, the indicator light is normally on;
the FD state indicator light is always on when the contactor FD is closed;
and a CD state indicator light, wherein when the contactor CD is closed, the indicator light is always on.
4. The system according to claim 1, further comprising a serial server (302) connected between the central monitoring platform (301) and the control motherboard (101), wherein the control motherboard (101) communicates with the central monitoring platform (301) through the serial server (302).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010609299.6A CN111740636B (en) | 2020-06-29 | 2020-06-29 | Bidirectional inverter and remote charging and discharging maintenance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010609299.6A CN111740636B (en) | 2020-06-29 | 2020-06-29 | Bidirectional inverter and remote charging and discharging maintenance system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111740636A CN111740636A (en) | 2020-10-02 |
| CN111740636B true CN111740636B (en) | 2021-07-30 |
Family
ID=72653512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010609299.6A Active CN111740636B (en) | 2020-06-29 | 2020-06-29 | Bidirectional inverter and remote charging and discharging maintenance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111740636B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039732A (en) * | 2017-12-29 | 2018-05-15 | 南京熊猫电子股份有限公司 | A kind of and the one-piece type photovoltaic energy-storage system power supply of off-network and its control method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202872688U (en) * | 2012-10-29 | 2013-04-10 | 新疆嘉盛阳光风电科技股份有限公司 | Bidirectional inverter |
| CN103094922B (en) * | 2013-01-11 | 2015-06-24 | 西安理工大学 | Two-level type single-phase grid-connected photovoltaic power generation control method |
| CN103457293B (en) * | 2013-09-12 | 2014-09-10 | 南京欧陆电气传动有限公司 | Single-phase grid connection inverter for solar photovoltaic power generation |
| JP6295782B2 (en) * | 2014-03-31 | 2018-03-20 | 株式会社安川電機 | Power conversion device, power generation system, control device, and power conversion method |
| CN104092278B (en) * | 2014-07-11 | 2017-05-17 | 安徽启光能源科技研究院有限公司 | Energy management method applied to photovoltaic energy storage system |
| CN104836321B (en) * | 2015-05-08 | 2017-11-28 | 南京熊猫电子股份有限公司 | Intelligent photovoltaic energy-storage system power supply and its control method |
| CN105245018A (en) * | 2015-09-25 | 2016-01-13 | 中国电力科学研究院 | Distributed energy storage system for improving confidence capacitance of photovoltaic power station |
| CN207542843U (en) * | 2017-12-14 | 2018-06-26 | 浙江创力电子股份有限公司 | Intelligent remote charge and discharge monitoring equipment |
-
2020
- 2020-06-29 CN CN202010609299.6A patent/CN111740636B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039732A (en) * | 2017-12-29 | 2018-05-15 | 南京熊猫电子股份有限公司 | A kind of and the one-piece type photovoltaic energy-storage system power supply of off-network and its control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111740636A (en) | 2020-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108683202B (en) | Energy storage system | |
| CN108418250B (en) | Distributed household energy storage system | |
| CN208078663U (en) | Distributed home energy-storage system | |
| CN111682569A (en) | Intelligent control's energy storage system | |
| CN112332528A (en) | Uninterrupted power supply system using lithium battery | |
| CN115421064A (en) | Online inversion capacity checking system and method for storage battery | |
| CN104882936B (en) | Communication energy storage power supply system | |
| CN213782969U (en) | Uninterrupted power supply system using lithium battery | |
| KR102273778B1 (en) | Battery Pack and Driving Method Thereof | |
| CN103812210A (en) | Intelligent monitoring system for alternating current-direct current uninterruptible power supply system | |
| CN111740636B (en) | Bidirectional inverter and remote charging and discharging maintenance system | |
| CN115514067B (en) | Energy storage battery pack management system device | |
| CN217935569U (en) | Photovoltaic power generation on-site multifunctional detection system | |
| CN215813253U (en) | Remote control system for checking capacity of communication power supply storage battery | |
| CN201274412Y (en) | Power control module in high frequency switch rectifying electric power and solar energy mixed switch cabinet | |
| CN204761067U (en) | Communication energy storage power supply system | |
| CN212572419U (en) | Bidirectional inverter and remote charging and discharging monitoring system | |
| CN210092957U (en) | Direct-current power supply device of transformer substation | |
| CN203434732U (en) | Power supply system for transformer substation inspection robot | |
| CN111726023A (en) | Bidirectional inverter and remote charging and discharging monitoring system | |
| CN219576654U (en) | Micro-grid circuit system sharing battery and energy storage equipment | |
| CN220964649U (en) | Series formation power supply device | |
| CN216290325U (en) | Power supply control system | |
| CN219247798U (en) | Comprehensive energy management cabinet for photovoltaic power generation system | |
| CN219458712U (en) | DC power supply system of transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |