CN208806741U - A kind of control system of reply mixing MMC sub-module fault - Google Patents
A kind of control system of reply mixing MMC sub-module fault Download PDFInfo
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Abstract
A kind of control system of reply mixing MMC sub-module fault, comprising: voltage acquisition module, current acquisition module, comparator, logic controller and keyboard input module；The voltage acquisition module and the input terminal of current acquisition module are connect with mixing MMC respectively, and output end is connect with the input terminal of comparator respectively；The input terminal of the comparator is also connect with the keyboard input module；The logic controller includes: OR circuit, and the input terminal of the OR circuit is connect with the output end of the comparator, and the output end of the OR circuit is connect with the mixing MMC, for controlling mixing MMC.The utility model provides a kind of control system of reply mixing MMC Neutron module failure, provides the foundation for the improvement of subsequent child module control system.
Description
Technical field
The utility model relates to flexible direct-current transmission fields, and in particular to a kind of control of reply mixing MMC sub-module fault
System processed.
Background technique
In recent years, multilevel technology is constantly promoted, and has been successfully applied in such as D.C. high voltage transmission, electric power
The industrial circles such as transmission, active power filtering, Static Synchronous compensation, block combiner multi-level converter (Modular Multilevel
Converter, MMC) as a kind of novel more level topology, in addition to having the advantages that traditional multi-level converter, module group
It closes multi-level converter and uses Modular Structure Design, be convenient for System Expansion and redundancy of effort；With off-center operation ability, event
Barrier passes through and recovery capability, and system reliability is high；Due to the high, change with common DC bus and favorable expandability, waveform quality
High-efficient Deng technological merits are changed, are widely used in flexible DC transmission and DC grid field.Relative to unitary class
The MMC that type submodule (sub-module, SM) is constituted, mixing MMC are made of two or more submodules, have more flexible control
Characteristic and fault ride-through capacity processed, show preferable development prospect.
But existing MMC submodule control system is not directed to a variety of in mixing MMC primarily directed to half-bridge MMC at present
Submodule influences each other, therefore is reply sub-module fault, and submodule control system needs to be suggested.
Utility model content
In order to solve the above-mentioned deficiency in the presence of the prior art, the utility model provides a kind of reply mixing MMC submodule
The control system of block failure passes through the control mixing MMC of the input of parameter, the acquisition of parameter, comparator and Logic control module
In full-bridge submodule and half-bridge submodule realized based on mixing MMC and the wherein topological diagram and working principle of HBSM and FBSM
The purpose of sub-module fault is coped with, guarantees the normal operation of mixing MMC and submodule.
Technical solution provided by the utility model is: a kind of control system of reply mixing MMC sub-module fault, comprising:
Voltage acquisition module, current acquisition module, comparator, logic controller and keyboard input module；
The voltage acquisition module and the input terminal of current acquisition module are connect with mixing MMC respectively, output end respectively with
The input terminal of comparator connects；
The input terminal of the comparator is also connect with the keyboard input module；
The logic controller includes: OR circuit, the output end of the input terminal of the OR circuit and the comparator
Connection, the output end of the OR circuit are connect with the mixing MMC, for controlling mixing MMC.
Preferably, the comparator includes: multiple input terminals and multiple output ends, and the keyboard input module includes multiple
Key；
Input terminal quantity, the output end quantity of the comparator are identical with the number of keys.
Preferably, the input terminal of the comparator and the quantity of output end are respectively 3；The keyboard input module is pressed
Key is 3.
Preferably, the first input end of the comparator respectively with the voltage acquisition module and the keyboard input module
First by key connection, be used for first operating parameter and the first acquisition parameter, and by comparison result pass through the ratio
The first output end compared with device exports；
Second input terminal of the comparator respectively with the current acquisition module and the keyboard input module second
By key connection, it is used for second operating parameter and the second acquisition parameter, and comparison result is passed through into the comparator
Second output terminal output；
The third input terminal of the comparator and the third of the keyboard input module are by key connection, for comparing third fortune
Threshold value in row parameter and comparator, and comparison result is exported by the third output end of the comparator.
Preferably, the control system further includes LED light, the output of the LED light and the comparator
End connection；
The quantity of the LED light is consistent with the quantity of the output end of the comparator.
Preferably, the LED light is 3, and the control system further includes 3 triggers；
First output end of the comparator is connected by the first trigger with the first LED light；
The second output terminal of the comparator is connected by the second trigger with the second LED light；
The third output end of the comparator is connected by third trigger with third LED light；
Based on each trigger, when the comparison result received is 1, the trigger is on state, otherwise described
Trigger is off-state.
Preferably, the mixing MMC includes: six bridge arms of three-phase, and each bridge arm is by a bridge arm reactance and multiple numbers
The adjustable half-bridge submodule of ratio and full-bridge submodule are in series；
The voltage acquisition module and current acquisition module are connect with any bridge arm of the mixing MMC respectively；
Each full-bridge submodule and each half-bridge submodule include submodule block controller and driving plate；
The output end of the OR circuit is connect with all submodule block controllers and driving plate.
Preferably, the control system further include: fiber optic telecommunications module and IGBT drive module；
The output end of the OR circuit is connect by the fiber optic telecommunications module with all submodule block controllers, is used for
When OR circuit output 1, all submodule controls of the logic controller by fiber optic telecommunications module to mixing MMC
Device processed sends control instruction, and otherwise the logic controller continues to monitor；
The output end of the OR circuit is connect by the IGBT drive module with all driving plates, for when described
When OR circuit output 1, the logic controller is sent by the IGBT drive module to all driving plates of mixing MMC
Driving instruction, otherwise the logic controller continues to monitor.
Preferably, the half-bridge submodule, comprising:
Insulated gate transistor T1, insulated gate transistor T2, diode D1, diode D2, DC capacitor C, power supply with
And equalizing resistance RP；
The emitter of the insulated gate transistor T1 is connect with the input terminal of the diode D1, and the insulated gate electrode is brilliant
The collector of body pipe T1 is connect with the output end of the diode D1；
The emitter of the insulated gate transistor T2 is connect with the input terminal of the diode D2, and the insulated gate electrode is brilliant
The collector of body pipe T2 is connect with the output end of the diode D2；
Institute is connected between the collector of the insulated gate transistor T1 and the emitter of the insulated gate transistor T2
State DC capacitor C；
The DC capacitor C, power supply and equalizing resistance RPIt is connected in parallel.
Preferably, the half-bridge submodule, further includes:
By-pass switch K1, thyristor K2, the first driving plate, the second driving plate and submodule block controller；
The base stage of the insulated gate transistor T1 is connect with first driving plate；
The base stage of the insulated gate transistor T2 is connect with second driving plate；
The anode of the thyristor K2 and the insulated gate transistor after the by-pass switch K1 is in parallel with thyristor K2
The emitter of T2, cathode are connect with the collector of the insulated gate transistor T2；
The submodule block controller is driven with by-pass switch K1, the gate pole of thyristor K2, first respectively by fiber optic communication
Plate, the second driving plate and power supply are connected, for by-pass switch K1, thyristor K2, the first driving plate, the second driving plate and
The control instruction of power supply transmission fiber optic telecommunications module.
Preferably, the full-bridge submodule, comprising:
Two symmetrically arranged half-bridge submodules.
Preferably, the control system further include: with the equal number of D/A converter modules of comparator input terminal；
Each D/A converter module is connected between keyboard input module and the input terminal of comparator, is used for the decimal system
Input data be converted to binary system after export.
Preferably, the comparator selects LM339 chip.
Compared with the immediate prior art, technical solution provided by the utility model is had the advantages that
Technical solution provided by the utility model, voltage acquisition module, current acquisition module, comparator, logic controller
And keyboard input module；The voltage acquisition module and the input terminal of current acquisition module are connect with mixing MMC respectively, output end
It is connect respectively with the input terminal of comparator；The input terminal of the comparator is also connect with the keyboard input module；The logic
Controller includes: OR circuit, and the input terminal of the OR circuit is connect with the output end of the comparator, the OR circuit
Output end connect with the mixing MMC, for controlling mixing MMC, provide a kind of reply mixing MMC Neutron module failure
Control system provides the foundation for the improvement of subsequent child module control system.
Technical solution provided by the utility model, when mixing the operating voltage and current data exception of MMC Neutron module,
By adjusting the control instruction for the driving instruction and fiber optic telecommunications module for being sent to IGBT drive module, protection mixing MMC not by
Damage.
Technical solution provided by the utility model can intuitively obtain generating mixing MMC by the state of LED display lamp
The reason of sub-module fault.
Technical solution provided by the utility model can be used for failure submodule bypassing processing circuit, mixed by changing
The control strategy for closing MMC Neutron module, and puts into the redundancy submodule of respective numbers, guarantee mixing MMC and half-bridge submodule with
The normal operation of full-bridge submodule.
Detailed description of the invention
Fig. 1 is a kind of control system schematic diagram of reply mixing MMC sub-module fault provided by the utility model；
Fig. 2 is that the mixing MMC in the utility model embodiment opens up complement；
Fig. 3 is half-bridge submodule topological structure schematic diagram provided by the utility model；
Fig. 4 is full-bridge submodule topological structure schematic diagram provided by the utility model.
Specific embodiment
The utility model in order to better understand is done with content of the example to the utility model with reference to the accompanying drawings of the specification
Further instruction.
As shown in Figure 1, the utility model provides a kind of control system of reply mixing MMC sub-module fault, comprising:
Voltage acquisition module, current acquisition module, comparator, logic controller and keyboard input module；
The voltage acquisition module and the input terminal of current acquisition module are connect with mixing MMC respectively, output end respectively with
The input terminal of comparator connects；
The input terminal of the comparator is also connect with the keyboard input module；
The logic controller includes: OR circuit, the output end of the input terminal of the OR circuit and the comparator
Connection, the output end of the OR circuit are connect with the mixing MMC, for controlling mixing MMC.
Keyboard input module is responsible for operating parameter is input to the comparator of control system circuit in mixing MMC in engineering
In.
In the present embodiment, comparator selects LM339 chip, and voltage acquisition module and current acquisition module further include ADC core
Piece, voltage acquisition module, current acquisition module and ADC chip are connect, for electricity with mixing MMC supply voltage, load current
The acquisition and conversion of pressure, electric current；
Logic controller further includes LCD data-out port, for connecting with 128 × 64LCD display screen, for showing control
The operational data of system Neutron module processed；
The data control system further includes power module, is connect with AC power supplies, realizes the power supply to system.
Mixing MMC topological diagram shown in Fig. 2, to compare operating current, operating voltage and the electricity of submodule in the present embodiment
For holding voltage, therefore comparator LM339 chip includes: 3 input terminals and 3 output ends, is reply submodule in mixing MMC
Block failure, will in engineering mix MMC operating parameter by with the same number of 3 key-press inputs of comparator input terminal, i.e. key
Input module includes 3 keys；First operating parameter is mixing MMC Neutron module operating current；Second operating parameter is mixing
MMC Neutron module operating voltage；Third operating parameter is mixing MMC Neutron module capacitance voltage.
Operating voltage and current information of the comparator based on the mixing MMC Neutron module received, group module voltage, electricity
Flowing amplitude is more than the working condition exception of judging submodule after threshold, the specific steps are as follows:
The first input end of the comparator respectively with the voltage acquisition module and the keyboard input module first
The first acquisition parameter by key connection, for acquiring the first operating parameter of first key-press input and voltage acquisition module
In input comparator, first operating parameter is compared in a comparator with the first acquisition parameter, when first operating parameter
Not less than first acquisition parameter, then the first comparison result is 1, and otherwise the first comparison result is 0, and by the first comparison result
It is exported by the first output end of the comparator；
Second input terminal of the comparator respectively with the current acquisition module and the keyboard input module second
The second acquisition parameter by key connection, for acquiring the second operating parameter of second key-press input and current acquisition module
In input comparator, second operating parameter is compared in a comparator with the second acquisition parameter, when second operating parameter
Not less than second acquisition parameter, then the second comparison result is 1, and otherwise the second comparison result is 0, and by the second comparison result
It is exported by the second output terminal of the comparator；
The third input terminal of the comparator and the third of the keyboard input module are used for by key connection by the third
In the third operating parameter input comparator of keyboard input module input, the third operating parameter and the threshold value phase in comparator
Than when the third operating parameter is not less than threshold value, then third comparison result is 1, and otherwise third comparison result is 0, and by the
Three comparison results are exported by the third output end of the comparator.
And control system further includes LED light, and the output end of the comparator is also connect with the LED light.
Further, control system further includes and the consistent LED light of comparator output terminal number and trigger；
It include 3 LED lights, 3 triggers in the present embodiment；
First output end of the comparator is connected by the first trigger with the first LED light；
The second output terminal of the comparator is connected by the second trigger with the second LED light；
The third output end of the comparator is connected by third trigger with third LED light；
When the comparison result that trigger receives is 1, the electricity between the output end of comparator and LED light is connected
Road, corresponding LED light are alerted by flashing, are otherwise in off state.
Further, control system further include: number and the consistent D/A converter module of comparator input terminal；
Each D/A converter module is connected between keyboard input module and the input port of comparator, for by ten into
The input data of system exports after being converted to binary system.
Half-bridge submodule and full-bridge submodule topology diagram as shown in Figure 3 and Figure 4, when mixing MMC Neutron module
When operating voltage and current data exception, by adjusting the driving instruction and fiber optic telecommunications module for being sent to IGBT drive module
Control instruction changes the control strategy of mixing MMC Neutron module.Failure submodule bypass is handled, and puts into respective numbers
Redundancy submodule guarantees the normal operation of mixing MMC and half-bridge submodule (HBSM) and full-bridge submodule (FBSM).
Wherein, IGBT drive module connect with half-bridge in mixing MMC or the driving plate in full-bridge submodule topology, is used for
Conversion and transmission IGBT driving instruction.
Fiber optic telecommunications module connect with half-bridge in mixing MMC or the submodule block controller in full-bridge submodule topology, is used for
Conversion and transmission submodule control instruction.
When mixing the operating voltage and current data exception of MMC Neutron module, by adjusting IGBT driving mould is sent to
The driving instruction of block and the control instruction of fiber optic telecommunications module change the control strategy of mixing MMC Neutron module.By failure submodule
Block bypass processing, and the redundancy submodule of respective numbers is put into, guarantee mixing MMC and half-bridge submodule (HBSM) and full-bridge submodule
The normal operation of block (FBSM).
The voltage acquisition module and current acquisition module connection connect with any bridge arm (ARC) for mixing MMC respectively
It connects；
Each full-bridge submodule and each half-bridge submodule include submodule block controller and driving plate；
The output end of the OR circuit is connect with all submodule block controllers and driving plate.
The control system, further includes: fiber optic telecommunications module and IGBT drive module；
The input terminal of the fiber optic telecommunications module is connected with the output end of the OR circuit, the fiber optic telecommunications module
Output end is connect with all submodule block controllers, for when OR circuit output 1, the logic controller to pass through light
Fiber communication control port sends control instruction to all submodule block controllers of mixing MMC；
The input terminal of the IGBT drive module is connected with the output end of the OR circuit, the IGBT drive module
Output end is connect with all driving plates, for when OR circuit output 1, the logic controller to pass through the IGBT
Drive module sends driving instruction to all driving plates of mixing MMC.
The half-bridge submodule, comprising: insulated gate transistor T1, insulated gate transistor T2, diode D1, diode
D2, DC capacitor C, power supply and equalizing resistance RP；
The emitter of the insulated gate transistor T1 is connect with the input terminal of the diode D1, and the insulated gate electrode is brilliant
The collector of body pipe T1 is connect with the output end of the diode D1；
The emitter of the insulated gate transistor T2 is connect with the input terminal of the diode D2, and the insulated gate electrode is brilliant
The collector of body pipe T2 is connect with the output end of the diode D2；
Institute is connected between the collector of the insulated gate transistor T1 and the emitter of the insulated gate transistor T2
State DC capacitor C；
The DC capacitor C, power supply and equalizing resistance RPIt is connected in parallel.
The half-bridge submodule, further includes:
By-pass switch K1, thyristor K2, the first driving plate, the second driving plate and submodule block controller；
The base stage of the insulated gate transistor T1 is connect with first driving plate；
The base stage of the insulated gate transistor T2 is connect with second driving plate；
The anode of the thyristor K2 and the insulated gate transistor after the by-pass switch K1 is in parallel with thyristor K2
The emitter of T2, cathode are connect with the collector of the insulated gate transistor T2；
The submodule block controller is driven with by-pass switch K1, the gate pole of thyristor K2, first respectively by fiber optic communication
Plate, the second driving plate and power supply are connected, for by-pass switch K1, thyristor K2, the first driving plate, the second driving plate and
The control instruction of power supply transmission fiber optic telecommunications module.
The full-bridge submodule, comprising:
Two symmetrically arranged half-bridge submodules.
The mixing MMC redundancy submodule control system of this reply sub-module fault can guarantee to mix MMC and half-bridge
The normal operation of module (HBSM) and full-bridge submodule (FBSM), to the son for mixing MMC reply sub-module fault in Practical Project
The automatic realization of module control has important reference.
When sub-module fault, by changing the control strategy of mixing MMC Neutron module, guarantee mixing MMC and half-bridge
The normal operation of module (HBSM) and full-bridge submodule (full bridge submodule, FBSM).
Its core function of control system provided in this embodiment is as follows:
1, detailed parameter setting data in mixing MMC is shown by LCD display.
2, by the realization of IGBT drive module and fiber optic telecommunications module to mixing half-bridge submodule (HBSM) and full-bridge in MMC
The control of submodule (FBSM).
3, operating voltage and current information of the comparator based on the mixing MMC Neutron module received, judging submodule
Whether working condition is normal.
4, when sub-module fault, logic controller sends warning instruction to LED light, sends son to LCD display
Operational data during module failure is to show.
5, when sub-module fault, by changing the control strategy of mixing MMC Neutron module, guarantee mixing MMC and half-bridge
The normal operation of submodule (HBSM) and full-bridge submodule (FBSM).
It is provided in this embodiment reply sub-module fault mixing MMC submodule control system can guarantee mix MMC and
The normal operation of half-bridge submodule (HBSM) and full-bridge submodule (FBSM) copes with submodule event to MMC is mixed in Practical Project
The automatic realization of the submodule control of barrier has important reference.
The above is only the embodiments of the present invention, are not intended to limit the utility model, all in the utility model
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done are all contained in and apply for pending the utility model
Scope of the claims within.
Claims (13)
1. a kind of control system of reply mixing MMC sub-module fault characterized by comprising
Voltage acquisition module, current acquisition module, comparator, logic controller and keyboard input module；
The voltage acquisition module and the input terminal of current acquisition module are connect with mixing MMC respectively, and output end is respectively compared with
The input terminal of device connects；
The input terminal of the comparator is also connect with the keyboard input module；
The logic controller includes: OR circuit, and the input terminal of the OR circuit is connect with the output end of the comparator,
The output end of the OR circuit is connect with the mixing MMC, for controlling mixing MMC.
2. control system as described in claim 1, which is characterized in that the comparator includes: multiple input terminals and multiple defeated
Outlet, the keyboard input module include multiple keys；
Input terminal quantity, the output end quantity of the comparator are identical with the number of keys.
3. control system as claimed in claim 2, which is characterized in that the input terminal of the comparator and the quantity point of output end
It Wei not be 3；The key of the keyboard input module is 3.
4. control system as claimed in claim 3, which is characterized in that the first input end of the comparator respectively with the electricity
The first of acquisition module and the keyboard input module is pressed to press key connection, for comparing the first operating parameter and the first acquisition ginseng
Number, and comparison result is exported by the first output end of the comparator；
Second input terminal of the comparator the second key with the current acquisition module and the keyboard input module respectively
Connection, for comparing the second operating parameter and the second acquisition parameter, and the second output that comparison result is passed through the comparator
End output；
The third input terminal of the comparator and the third of the keyboard input module are by key connection, for comparing third operation ginseng
Threshold value in several and comparator, and comparison result is exported by the third output end of the comparator.
5. control system as claimed in claim 4, which is characterized in that it further include LED light, the LED light and institute
State the output end connection of comparator；
The quantity of the LED light is consistent with the quantity of the output end of the comparator.
6. control system as claimed in claim 5, which is characterized in that the LED light is 3, and the control system is also
Including 3 triggers；
First output end of the comparator is connected by the first trigger with the first LED light；
The second output terminal of the comparator is connected by the second trigger with the second LED light；
The third output end of the comparator is connected by third trigger with third LED light；
Based on each trigger, when the comparison result received is 1, the trigger is on state, the otherwise triggering
Device is off-state.
7. control system as described in claim 1, which is characterized in that the mixing MMC includes: six bridge arms of three-phase, each
Bridge arm is in series by a bridge arm reactance and the adjustable half-bridge submodule of multiple number ratios and full-bridge submodule；
The voltage acquisition module and current acquisition module are connect with any bridge arm of the mixing MMC respectively；
Each full-bridge submodule and each half-bridge submodule include submodule block controller and driving plate；
The output end of the OR circuit is connect with all submodule block controllers and driving plate.
8. control system as claimed in claim 7, which is characterized in that further include: fiber optic telecommunications module and IGBT drive module；
The output end of the OR circuit is connect by the fiber optic telecommunications module with all submodule block controllers, for working as institute
When stating OR circuit output 1, the logic controller passes through fiber optic telecommunications module to all submodule block controllers of mixing MMC
Control instruction is sent, otherwise the logic controller continues to monitor；
The output end of the OR circuit is connect by the IGBT drive module with all driving plates, for when described or door
When circuit output 1, the logic controller sends driving to all driving plates of mixing MMC by the IGBT drive module
Instruction, otherwise the logic controller continues to monitor.
9. control system as claimed in claim 8, which is characterized in that the half-bridge submodule, comprising:
Insulated gate transistor T1, insulated gate transistor T2, diode D1, diode D2, DC capacitor C, power supply and
Piezoresistance RP；
The emitter of the insulated gate transistor T1 is connect with the input terminal of the diode D1, the insulated gate transistor
The collector of T1 is connect with the output end of the diode D1；
The emitter of the insulated gate transistor T2 is connect with the input terminal of the diode D2, the insulated gate transistor
The collector of T2 is connect with the output end of the diode D2；
It is connected between the collector of the insulated gate transistor T1 and the emitter of the insulated gate transistor T2 described straight
Galvanic electricity holds C；
The DC capacitor C, power supply and equalizing resistance RPIt is connected in parallel.
10. control system as claimed in claim 9, which is characterized in that the half-bridge submodule, further includes:
By-pass switch K1, thyristor K2, the first driving plate, the second driving plate and submodule block controller；
The base stage of the insulated gate transistor T1 is connect with first driving plate；
The base stage of the insulated gate transistor T2 is connect with second driving plate；
The anode of the thyristor K2 is with the insulated gate transistor T2's after the by-pass switch K1 is in parallel with thyristor K2
Emitter, cathode are connect with the collector of the insulated gate transistor T2；
The submodule block controller by fiber optic communication respectively with by-pass switch K1, the gate pole of thyristor K2, the first driving plate, the
Two driving plates and power supply are connected, and are used for by-pass switch K1, thyristor K2, the first driving plate, the second driving plate and power supply
Send the control instruction of fiber optic telecommunications module.
11. control system as claimed in claim 10, which is characterized in that the full-bridge submodule, comprising:
Two symmetrically arranged half-bridge submodules.
12. control system as claimed in claim 2, which is characterized in that further include: with the equal number of digital-to-analogues of comparator input terminal
Conversion module；
Each D/A converter module is connected between keyboard input module and the input terminal of comparator, and being used for will be metric defeated
Enter after data are converted to binary system and exports.
13. control system as described in claim 1, which is characterized in that the comparator selects LM339 chip.
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| CN201821238188.3U CN208806741U (en) | 2018-08-02 | 2018-08-02 | A kind of control system of reply mixing MMC sub-module fault |
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| CN201821238188.3U CN208806741U (en) | 2018-08-02 | 2018-08-02 | A kind of control system of reply mixing MMC sub-module fault |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441630A (en) * | 2019-07-30 | 2019-11-12 | 国电南瑞科技股份有限公司 | A kind of the MMC submodule function detection device and method of flexibly configurable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441630A (en) * | 2019-07-30 | 2019-11-12 | 国电南瑞科技股份有限公司 | A kind of the MMC submodule function detection device and method of flexibly configurable |
| CN110441630B (en) * | 2019-07-30 | 2021-10-22 | 国电南瑞科技股份有限公司 | Flexibly configurable MMC sub-module function detection device and method |
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