CN109361309A - Parallelly connected reverse converter system and Wave-chasing current-limiting control method - Google Patents

Parallelly connected reverse converter system and Wave-chasing current-limiting control method Download PDF

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Publication number
CN109361309A
CN109361309A CN201811289718.1A CN201811289718A CN109361309A CN 109361309 A CN109361309 A CN 109361309A CN 201811289718 A CN201811289718 A CN 201811289718A CN 109361309 A CN109361309 A CN 109361309A
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Prior art keywords
inverter
wave
wave limiting
control device
control module
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CN201811289718.1A
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CN109361309B (en
Inventor
张伟华
罗证嘉
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Suzhou Inovance Technology Co Ltd
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Suzhou Inovance Technology Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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
    • H02M7/493Conversion 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 the static converters being arranged for operation in parallel

Abstract

The embodiment of the invention provides a kind of parallelly connected reverse converter system and Wave-chasing current-limiting control method, the parallelly connected reverse converter system includes wave limiting control device, and the interface board of multiple inverters is connected respectively to the wave limiting control device;Wherein: when any inverter triggers wave limiting signal, the wave limiting signal being sent to by the wave limiting control device by the corresponding interface board of the inverter;The wave limiting control device is when receiving the wave limiting signal that any inverter is sent, wave limiting signal is issued to all inverters simultaneously by interface board corresponding to each shunt chopper, the inverter for triggering all parallel connections opens wave limiting simultaneously.The synchronous triggering of gradually current limliting of shunt chopper may be implemented in the embodiment of the present invention, hardware over current fault occur in other inverters caused by avoiding parallelly connected reverse converter system appearance that wave limiting is activated individually because of a certain inverter.

Description

Parallelly connected reverse converter system and Wave-chasing current-limiting control method
Technical field
The present embodiments relate to power electronic equipment field, more specifically to a kind of parallelly connected reverse converter system and Wave-chasing current-limiting control method.
Background technique
High power contravariant device is generally formed by the inverter parallel of more equal-wattages, as the bank of MW class is produced with power supply Product.Inverter parallel can realize that large capacity is powered, while be greatly improved the flexibility of system, make the body of power-supply system Product, weight substantially reduce, while the current stress of its main switching device can also greatly reduce, thus improve reliability, reduce at Sheet and raising power density.
As shown in Figure 1, being the schematic diagram of existing inverter parallel scheme.In the inverter parallel scheme, including master control Module 11 and machine control module 12, multiple inverters 13, and each inverter 13 includes an interface board.Above-mentioned and machine control Molding block is used when plant capacity demand is greater than single machine maximum power, and main control module 11 and machine control module 12, multiple inverse Become between device 13 and carries out data communication using optical fiber.
In above-mentioned each inverter 13, its phase current, above-mentioned phase current warp are obtained by current sampling device respectively After over-sampling modulate circuit conditioning compared with wave limiting threshold value (for example, it is preferable to being 2 times of rated current peak values).Work as load sudden change When, such as the incision of transformer, when the loads such as the impact load of motor quickly change, each inverter 13 can be according to the electricity itself sampled Flow valuve judges whether to be more than wave limiting threshold value, if more than wave limiting threshold value, inverter 13 will trigger wave limiting function Can, triggering hardware over current fault is prevented, to guarantee the reliability service of equipment.
When more inverters 13 are used in parallel, due to the consistency problem of device and equipment itself, load not can guarantee 13 electric current of every inverter in parallel is completely the same when mutation, while also not can guarantee more inverters 13 and can trigger simultaneously respectively From wave limiting function.When load sudden change, since the inverter 13 of part in parallel first triggers wave limiting function, to lead Cause other inverters since curent change is too fast, excessive, directly triggering over current fault, cause equipment to be stopped transport, it is serious may Cause production accident.
Summary of the invention
The embodiment of the present invention causes other inverse in above-mentioned parallelly connected reverse converter system because of a certain inverter wave limiting Become device and the problem of hardware over current fault occur, a kind of parallelly connected reverse converter system and Wave-chasing current-limiting control method are provided.
The technical solution that the embodiment of the present invention solves above-mentioned technical problem is to provide a kind of parallelly connected reverse converter system, including Main control module, and machine control module and multiple inverters being connected in parallel, each inverter include interface board, and each institute Interface board is stated to be connected to the main control module via described and machine control module;It is characterized in that, the parallelly connected reverse converter system It further include wave limiting control device, and the interface board of multiple inverters is connected respectively to the wave limiting control dress It sets;Wherein:, will be described by wave by the corresponding interface board of the inverter when any inverter triggers wave limiting signal Current limit signal is sent to the wave limiting control device;The wave limiting control device is receiving any inversion When the wave limiting signal that device is sent, issued simultaneously to all inverters by interface board corresponding to each shunt chopper Wave limiting signal, the inverter for triggering all parallel connections open wave limiting simultaneously.
Preferably, the wave limiting control device is connected to the main control module, and the wave limiting control device Including micro-control unit;
The micro-control unit connects the first self-test order issued for receiving the main control module, and certainly according to described first Inspection order sends self-test signal to each inverter, and each inverter is made to execute self-test operations;
The micro-control unit also receives each inverter and executes the first feedback signal returned after self-test operations, and First feedback signal is sent to the main control module, determines the main control module according to first feedback signal each Control is described when inverter equal fault-free and machine control module, inverter and the starting operation of wave limiting control device.
Preferably, the wave limiting control device is connected to the main control module, and each inverter includes self-test Module;
The selftest module is used to receive the second self-test order that the main control module is sent, and according to second self-test Order starting self-test operations;
The selftest module is also used to send the second feedback signal to the main control module according to self-test operations result, makes institute State that control when main control module determines each inverter equal fault-free according to second feedback signal is described and machine control module, inversion Device and the starting operation of wave limiting control device.
Preferably, each interface board is connected to the wave limiting control device by optical fiber.
Preferably, the wave limiting control device includes field programmable gate array;The field programmable gate array Including multiple input interfaces and multiple output interfaces, and each interface board is connected to the scene by a pair of of optical fiber and can compile An input interface and an output interface for journey gate array;The field programmable gate array is only non-in all input interfaces When predetermined level, all output interfaces is made to export non-default level.
The embodiment of the present invention also provides a kind of Wave-chasing current-limiting control method, is applied to parallelly connected reverse converter system, the parallel connection Inverter system includes main control module and machine control module and multiple inverters being connected in parallel, and each inverter includes Interface board, and each interface board is connected to the main control module via described and machine control module;The shunt chopper System further includes wave limiting control device, and the interface board of multiple inverters is connected respectively to the wave limiting control Device, which comprises
When any inverter triggering wave limiting signal in the parallelly connected reverse converter system, pass through the inverter pair The wave limiting signal is sent to the wave limiting control device by the interface board answered;
The wave limiting control device when receiving the wave limiting signal that any inverter is sent, Wave limiting signal is issued to all inverters simultaneously by interface board corresponding to each shunt chopper, triggers all parallel connections Inverter opens wave limiting simultaneously.
Preferably, the wave limiting control device is connected to the main control module, the method also includes:
The wave limiting control device receives the first self-test order that the main control module issues, certainly according to described first Inspection order sends self-test signal to each inverter, and each inverter is made to execute self-test operations;
The wave limiting control device receives each inverter and executes the first feedback letter returned after self-test operations Number, and first feedback signal is sent to the main control module, make the main control module according to first feedback signal Control is described when determining each inverter equal fault-free and machine control module, inverter and wave limiting control device starting fortune Row.
Preferably, which comprises
The main control module sends the second self-test order to each inverter;
Each inverter starts self-test operations according to the second self-test order, and according to self-test operations result to institute It states main control module and sends the second feedback signal;
Control is described when the main control module determines each inverter equal fault-free according to second feedback signal and machine control Molding block, inverter and the starting operation of wave limiting control device.
Preferably, each interface board is connected to the wave limiting control device by optical fiber.
Preferably, the wave limiting control device includes field programmable gate array;The field programmable gate array Including multiple input interfaces and multiple output interfaces, and each interface board is connected to the scene by a pair of of optical fiber and can compile An input interface and an output interface for journey gate array;The field programmable gate array is only non-in all input interfaces When predetermined level, all output interfaces is made to export non-default level.
The parallelly connected reverse converter system and Wave-chasing current-limiting control method of the embodiment of the present invention, by by wave limiting control device Realize that the wave limiting signal of the interface board of each inverter is synchronous, can avoid in parallelly connected reverse converter system because a certain inverter by There is hardware over current fault in other inverters caused by wave current limliting.
Detailed description of the invention
Fig. 1 is the topological structure schematic diagram of existing parallelly connected reverse converter system;
Fig. 2 is the schematic diagram of parallelly connected reverse converter system provided in an embodiment of the present invention;
Fig. 3 is the schematic diagram of wave limiting control device in parallelly connected reverse converter system provided in an embodiment of the present invention;
Fig. 4 is wave limiting hardware Time delay measurement figure in parallelly connected reverse converter system provided in an embodiment of the present invention;
Fig. 5 is the flow diagram of Wave-chasing current-limiting control method provided in an embodiment of the present invention;
Fig. 6 is the flow diagram of self-test step in Wave-chasing current-limiting control method provided in an embodiment of the present invention;
Fig. 7 be another embodiment of the present invention provides Wave-chasing current-limiting control method in self-test step flow diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
As shown in Fig. 2, being the schematic diagram of parallelly connected reverse converter system provided in an embodiment of the present invention, the parallelly connected reverse converter system It can be MW class bank voltage or similar power electronic equipment.The parallelly connected reverse converter system of the present embodiment includes main control module And machine control module 22, multiple inverters 23 and wave limiting control device 24 being connected in parallel 21,.Above-mentioned each inverter 23 include interface board.In practical applications, the quantity of inverter 23 can adjust as needed.
Above-mentioned main control module 21 can be connected to by a pair of of optical fiber and machine control module 22, and each inverter 23 is connected in parallel To DC bus, and the interface board of each inverter 23 passes through optical fiber respectively and is connected to Parallel Control modules 22.In parallel inverter When device system works, main control module 21 realizes the tasks such as inverter function algorithm, motor control algorithms, PERCOM peripheral communication, and passes through Optical fiber descends into control information the interface board of each inverter 23, and the operation ginseng that the interface board for receiving inverter 23 uploads The information such as number, module failure, working condition;And machine control module 22 plays the role of forming a connecting link in systems, mainly uses In realize PWM (Pulse Width Modulation, pulse width adjustment) hair wave instruction distribution, from the interface board of inverter 23 Sampled data simultaneously arranges, the electric current of inverter 23 output sharing control etc.;Interface board is used to be distributed according to simultaneously machine control module 22 PWM hair wave instruction generate the driving signal of the inverter 23 where it, (such as insulated with controlling power cell in inverter 23 Grid bipolar junction transistor) switch motion, and acquisition phase current, the related datas such as busbar voltage and pass through fiber optic communication upload Control operation is carried out to main control module 21.
Above-mentioned each inverter 23 has the function of wave limiting, i.e. the current value that is sampled according to itself Hall of inverter 23, (entire comparison circuit can be by hardware realization) is compared with the wave limiting threshold value of setting, when the current value of sampling is more than setting Threshold value after, comparison circuit trigger wave limiting signal, interface board after receiving hardware wave limiting signal, immediately stop hair Wave makes inverter 23 stop output.
The interface board of above-mentioned each inverter 23 is also respectively connected to wave limiting control device 24, and any inverter 23 exists When triggering wave limiting operation, wave limiting signal, and wave limiting control device 24 are sent to wave limiting control device 24 When receiving the wave limiting signal that any inverter 23 is sent, simultaneously by interface board corresponding to each shunt chopper 23 Wave limiting signal is issued to all inverters 23, the inverter 23 for triggering all parallel connections opens wave limiting simultaneously.
In above-mentioned parallelly connected reverse converter system, when wave limiting function occurs for any one or more inverters 23, by Wave current limiting control apparatus 24 triggers the wave limiting function of all inverters 23 by synchronizing, and guarantees in the case where load sudden change, The reliable and stable operation of parallelly connected reverse converter system.
For the synchronous efficiency for improving wave limiting signal, the interface board of above-mentioned inverter 23 can be connected to by optical fiber respectively Wave limiting control device 24.Since hardware circuit (the signal transmission i.e. between interface board and wave limiting control device 24) is deposited In certain time-delay Tdelay, in above-mentioned parallelly connected reverse converter system, all inverters 23 open the maximum delay of wave limiting function For 2 × Tdelay(inverter 23 receives the signal from wave limiting control device), by experiment test it is found that being connect using optical fiber Oralia and wave limiting control device 24 carry out the delay time T of signal transmissiondelayFor 240-290ns (experimental waveform such as Fig. 4 institute Show), maximum delay is 2 × Tdelay, less than the rise time that the electric current of inverter 23 crosses from wave limiting point to hardware flow point (5us), it is ensured that electric current wave limiting function action before rising to hardware overcurrent activation threshold value in inverter 23 avoids touching Harden part over current fault.
As shown in figure 3, above-mentioned wave limiting control device 24 includes field programmable gate array (Field- Programmable Gate Array, FPGA) 241, which includes multiple input interfaces and multiple Output interface, and each interface board by a pair of of optical fiber be connected to field programmable gate array an input interface and one it is defeated Outgoing interface.Field programmable gate array is only non-default level (such as low level, i.e., non-wave limiting letter in all input interfaces Number) when, so that all output interfaces is exported non-default level;And any input interface be predetermined level (such as high level, i.e., by Wave current limit signal), make all output interface output predetermined levels, i.e. triggering wave limiting is synchronous.
To guarantee that above-mentioned parallelly connected reverse converter system reliability service, above-mentioned parallelly connected reverse converter system can also have self-checking function. The self-checking function specifically may be accomplished by: wave limiting control device 24 be connect with main control module 21, and by wave Current limiting control apparatus 24 includes micro-control unit 242.When parallelly connected reverse converter system powers on or system starting is run, main control module 21 send the first self-test order to wave limiting control device 24;Micro-control unit 42 starts after receiving the first self-test order Self-check program sends self-test signal to each inverter 23, each inverter 23 is made to execute self-test operations.The micro-control unit 42 It also receives each inverter 23 and executes the first feedback signal returned after self-test operations, and by above-mentioned first feedback signal (inverse When change device 23 is normal, the first feedback signal returned is normal) it is sent to main control module 21;Main control module 21 is anti-according to first Feedback signal (when not receiving the first feedback signal of a certain inverter 23, confirming 23 failure of inverter) determines each inverter Control and machine control module 22, each inverter 23 and the starting operation of wave limiting control device 24 when equal fault-free.
In addition, the self-checking function of parallelly connected reverse converter system also may be accomplished by: the interface of each inverter 23 Plate includes selftest module.The selftest module is used to receive the second self-test order of the transmission of main control module 21, and according to above-mentioned second (when parallelly connected reverse converter system powers on or system is run, main control module 21 is to each inverter for self-test order starting self-test operations 23 send the second self-test order).The selftest module sends the second feedback signal to main control module 21 also according to self-test operations result; Control and machine control module 22, each inverter when main control module 21 determines each inverter equal fault-free according to the second feedback signal 23 and wave limiting control device 24 starting operation.
As shown in figure 5, being the flow diagram of Wave-chasing current-limiting control method provided in an embodiment of the present invention, the wave limiting Control method can be applied to parallelly connected reverse converter system, and the parallelly connected reverse converter system include main control module and machine control module, it is more A inverter being connected in parallel and wave limiting control device, each inverter include interface board, and each interface board via Described and machine control module is connected to the main control module, and the interface board of each inverter is also respectively connected to wave limiting control Device.The Wave-chasing current-limiting control method of the present embodiment includes:
Step S51: when any inverter triggering wave limiting operation in parallelly connected reverse converter system, pass through the inverter Wave limiting signal is sent to wave limiting control device by corresponding interface board.When to guarantee the synchronous response of wave limiting Between, each interface board is connected to wave limiting control device by optical fiber.
Above-mentioned wave limiting control device includes field programmable gate array, which includes multiple defeated Incoming interface and multiple output interfaces, and each interface board is connected to an input of field programmable gate array by a pair of of optical fiber Interface and an output interface.
Step S52: wave limiting control device when receiving the wave limiting signal that any inverter is sent, while to All inverters send wave limiting signal.
When wave limiting control device includes field programmable gate array, the field programmable gate array is only all defeated When incoming interface is non-default level (such as low level, i.e., non-wave limiting signal), all output interfaces is made to export non-default electricity It is flat;And be predetermined level (such as high level, i.e. wave limiting signal) in any input interface, keep all output interfaces outputs pre- If level, i.e. triggering wave limiting is synchronous.
Step S53: interface board stops output when receiving the wave limiting signal from wave limiting control device.I.e. The wave limiting signal of each inverter is from two channels, and one is inverter own hardware circuit signal where it, i.e., Inverter internal triggers wave limiting signal, another signal is from external trigger, the i.e. transmission of wave limiting control device The wave limiting signal to come over, the wave limiting signal in two channels can trigger the wave limiting of inverter.
As shown in fig. 6, for the above-mentioned parallelly connected reverse converter system reliability service of guarantee, above-mentioned Wave-chasing current-limiting control method further includes Self-test step:
Step S61: main control module sends the first self-test order to wave limiting control device.The step can be in parallel inverter It is executed when device system electrification or starting operation.
Step S62: wave limiting control device receives the first self-test name that main control module is sent, and according to the first self-test It orders to each inverter and sends self-test signal.
Step S63: wave limiting control device receives each inverter and executes the first feedback letter returned after self-test operations Number, and main control module is sent by above-mentioned first feedback signal.Inverter is when normal, to the first of the return of wave limiting device Feedback signal is normal.
Step S64: control and machine control when main control module determines each inverter equal fault-free according to first feedback signal Molding block, inverter and the starting operation of wave limiting control device.In the first feedback signal for not receiving a certain inverter When, main control module confirms the fault of converter.
As shown in fig. 7, each interface board includes selftest module, the self-test step of above-mentioned Wave-chasing current-limiting control method can It is accomplished by the following way:
Step S71: main control module sends the second self-test order to each inverter.The step can be in parallelly connected reverse converter system Execution when powering on or starting operation.
Step S72: each inverter starts self-test operations according to the second self-test order, and according to self-test operations result The second feedback signal is sent to main control module.Above-mentioned inverter is when self-test is normal, to the second feedback letter of main control module return It number is normal.
Step S73: main control module determines the equal fault-free time control of each inverter according to the second feedback signal that inverter returns It makes and machine control module, inverter and the starting of wave limiting control device is run.The second of a certain inverter is not being received When feedback signal, main control module confirms the fault of converter.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art, It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims Subject to.

Claims (10)

1. a kind of parallelly connected reverse converter system, each including main control module and machine control module and multiple inverters being connected in parallel The inverter includes interface board, and each interface board is connected to the main control module via described and machine control module; It is characterized in that, the parallelly connected reverse converter system further includes wave limiting control device, and the interface board of multiple inverters It is connected respectively to the wave limiting control device;Wherein: when any inverter triggers wave limiting signal, by described The wave limiting signal is sent to the wave limiting control device by the corresponding interface board of inverter;The wave limiting control Device processed is when receiving the wave limiting signal that any inverter is sent, by corresponding to each shunt chopper Interface board issue wave limiting signal to all inverters simultaneously, the inverter for triggering all parallel connection is opened simultaneously by wave limit Stream.
2. parallelly connected reverse converter system according to claim 1, which is characterized in that the wave limiting control device with it is described Main control module connection, and the wave limiting control device includes micro-control unit;
The micro-control unit connects the first self-test order issued for receiving the main control module, and is ordered according to first self-test It enables to each inverter and sends self-test signal, each inverter is made to execute self-test operations;
The micro-control unit also receives each inverter and executes the first feedback signal returned after self-test operations, and by institute It states the first feedback signal and is sent to the main control module, the main control module is made to determine each inversion according to first feedback signal Control is described when device equal fault-free and machine control module, inverter and the starting operation of wave limiting control device.
3. parallelly connected reverse converter system according to claim 1, which is characterized in that the wave limiting control device with it is described Main control module connection, each inverter includes selftest module;
The selftest module is used to receive the second self-test order that the main control module is sent, and according to the second self-test order Start self-test operations;
The selftest module is also used to send the second feedback signal to the main control module according to self-test operations result, makes the master Control is described when control module determines each inverter equal fault-free according to second feedback signal and machine control module, inverter with And wave limiting control device starting operation.
4. parallelly connected reverse converter system according to claim 2 or 3, which is characterized in that each interface board passes through optical fiber It is connected to the wave limiting control device.
5. parallelly connected reverse converter system according to claim 4, which is characterized in that the wave limiting control device includes existing Field programmable gate array;The field programmable gate array includes multiple input interfaces and multiple output interfaces, and each described Interface board is connected to an input interface and an output interface for the field programmable gate array by a pair of of optical fiber;It is described Field programmable gate array only when all input interfaces are non-default level, makes all output interfaces export non-default level.
6. a kind of Wave-chasing current-limiting control method is applied to parallelly connected reverse converter system, the parallelly connected reverse converter system includes master control mould Block, and machine control module and multiple inverters being connected in parallel, each inverter include interface board, and each interface Plate is connected to the main control module via described and machine control module;It is characterized in that, the parallelly connected reverse converter system further includes Wave limiting control device, and the interface board of multiple inverters is connected respectively to the wave limiting control device, it is described Method includes:
It is corresponding by the inverter when any inverter triggering wave limiting signal in the parallelly connected reverse converter system The wave limiting signal is sent to the wave limiting control device by interface board;
The wave limiting control device passes through when receiving the wave limiting signal that any inverter is sent Interface board corresponding to each shunt chopper issues wave limiting signal to all inverters simultaneously, triggers the inversion of all parallel connections Device opens wave limiting simultaneously.
7. Wave-chasing current-limiting control method according to claim 6, which is characterized in that the wave limiting control device and institute Main control module connection is stated, the method also includes:
The wave limiting control device receives the first self-test order that the main control module issues, and is ordered according to first self-test It enables to each inverter and sends self-test signal, each inverter is made to execute self-test operations;
The wave limiting control device receives each inverter and executes the first feedback signal returned after self-test operations, and First feedback signal is sent to the main control module, determines the main control module according to first feedback signal each Control is described when inverter equal fault-free and machine control module, inverter and the starting operation of wave limiting control device.
8. Wave-chasing current-limiting control method according to claim 6, which is characterized in that the described method includes:
The main control module sends the second self-test order to each inverter;
Each inverter starts self-test operations according to the second self-test order, and according to self-test operations result to the master It controls module and sends the second feedback signal;
Control is described when the main control module determines each inverter equal fault-free according to second feedback signal and machine controls mould Block, inverter and the starting operation of wave limiting control device.
9. Wave-chasing current-limiting control method a method according to any one of claims 6-8, which is characterized in that each interface board The wave limiting control device is connected to by optical fiber.
10. Wave-chasing current-limiting control method a method according to any one of claims 6-8, which is characterized in that the wave limiting Control device includes field programmable gate array;The field programmable gate array includes that multiple input interfaces and multiple outputs connect Mouthful, and each interface board by a pair of optical fiber be connected to the field programmable gate array an input interface and one Output interface;The field programmable gate array only when all input interfaces are non-default level, keeps all output interfaces defeated Non-default level out.
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