CN203101587U - Over-current turn-off test device for flexible direct current power transmission MMC valve - Google Patents

Over-current turn-off test device for flexible direct current power transmission MMC valve Download PDF

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Publication number
CN203101587U
CN203101587U CN 201220614194 CN201220614194U CN203101587U CN 203101587 U CN203101587 U CN 203101587U CN 201220614194 CN201220614194 CN 201220614194 CN 201220614194 U CN201220614194 U CN 201220614194U CN 203101587 U CN203101587 U CN 203101587U
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China
Prior art keywords
igbt module
submodule
change
over switch
terminal
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Expired - Lifetime
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CN 201220614194
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Chinese (zh)
Inventor
罗湘
查鲲鹏
高冲
吴亚楠
周竞之
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State Grid Corp of China SGCC
Global Energy Interconnection Research Institute
China EPRI Electric Power Engineering Co Ltd
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State Grid Corp of China SGCC
China EPRI Electric Power Engineering Co Ltd
Smart Grid Research Institute of SGCC
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Priority to CN 201220614194 priority Critical patent/CN203101587U/en
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Publication of CN203101587U publication Critical patent/CN203101587U/en
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Abstract

The utility model provides an over-current turn-off test device for a flexible direct current power transmission MMC valve. The over-current turn-off test device for the flexible direct current power transmission MMC valve comprises a sample valve, a switching switch, a load loop, a circuit switch and a charging power source. The over-current turn-off test device can meet over-current turn-off test requirements of the MMC valve, can provide transient heat intensity, transient fault current intensity, transient high voltage intensity, subsidiary circuit loss intensity, current change rate (di/dt) intensity and voltage change rate (dv/dt) intensity similar to practical operation conditions and provides bases for the practical operation conditions.

Description

A kind of excess current of flexible DC power transmission MMC valve is closed breaking test device
Technical field
The utility model belongs to electric and electronic technical field, and the excess current that is specifically related to a kind of flexible DC power transmission MMC valve is closed breaking test device.
Background technology
Starting along with flexible DC power transmission (VSC-HVDC) technology in electric system applied, and the reliability of its core component---high-power high voltage insulated gate bipolar transistor (IGBT) valve becomes the key of security of system.Because the VSC-HVDC device generally has, voltage is high, electric current is large, characteristics capacious, being difficult to build the identical full live road with actual operating mode in experimental enviroment is tested, therefore how to build equivalent hookup in experimental enviroment, carry out the test suitable with actual operating mode intensity and become the key of dealing with problems.
VSC-HVDC based on modularization multi-level converter (MMC) as shown in Figure 1, is to realize utilizing the IGBT valve to carry out a kind of mode of direct current transportation.Its core component is called the MMC valve, and in normal operating condition, submodule, by the cooperation of upper and lower two IGBT, can be exported two kinds of level: 0 level and condenser voltage.
In the actual motions based on turn-off device valve high power electronic equipment such as flexible direct current, there are two kinds of excess current operating modes in the turn-off device IGBT in the MMC valve.A kind of is the submodule inside that causes due to fault or the bridge arm direct pass between submodule; Another kind is the slow overcurrent of IGBT caused due to a variety of causes, the difference of two kinds of excess current be the current-rising-rate of the first excess current and current amplitude all very large.No matter the excess current of which kind of operating mode occurs, and all needs control circuit the pulse of excess current locking IGBT can be detected in time with protection device.
The utility model content
For the deficiencies in the prior art; the utility model provides a kind of excess current of flexible DC power transmission MMC valve to close breaking test device, and the test valve causes that for meeting it is correct that IGBT drives the design of maximum current, voltage and temperature stress effect under the excess current operating condition of protecting.
The excess current of a kind of flexible DC power transmission MMC valve that the utility model provides is closed breaking test device, and its improvements are, described device comprises test product valve, change-over switch, load circuit, contactor and the charge power supply connected successively.
Wherein, described test product valve comprises the first submodule and second submodule of series connection;
Described the first submodule comprises IGBT module T 11, IGBT module T 12, resistance D 11, resistance D 12and capacitor C sM1; Described IGBT module T 11with described IGBT module T 12the series connection after with described capacitor C sM1parallel connection, described resistance D 11with described resistance D 12the series connection after with described capacitor C sM1in parallel;
The second submodule comprises IGBT module T 21, IGBT module T 22, resistance D 21, resistance D 22and capacitor C sM2; Described IGBT module T 21with described IGBT module T 22the series connection after with described capacitor C sM2parallel connection, described resistance D 21with described resistance D 22the series connection after with described capacitor C sM2in parallel;
The IGBT module T of described series connection 11with IGBT module T 12the intermediate point leading-out terminal, be the high-voltage output end of the first submodule;
The IGBT module T of described series connection 21with IGBT module T 22intermediate point and described IGBT module T 12connect, and leading-out terminal, be the second submodule high-voltage output end;
Described capacitor C sM2anodal leading-out terminal, be the second submodule capacitor high voltage end;
Described capacitor C sM2the negative pole leading-out terminal, be the second submodule low-voltage output.
Wherein, described IGBT module T 11, IGBT module T 12, IGBT module T 21with IGBT module T 22include antiparallel diode and IGBT.
Wherein, described change-over switch comprises change-over switch K t1with change-over switch K t2;
Described change-over switch K t1two terminals of corresponding configuration, terminal D 1with terminal U 1; Described terminal D 1with the second submodule capacitor high voltage end, be connected; Described terminal U 1with the first submodule high-voltage output end, be connected;
Described change-over switch K t2two terminals of corresponding configuration, terminal D 2with terminal U 2; Described terminal D 2with the second submodule high-voltage output end, be connected; Described terminal U 2with the second submodule low-voltage output, be connected;
Described change-over switch K t1with described change-over switch K t2interlock.
Wherein, described load circuit comprises load branch I and load branch II;
Described load branch I comprises the K switch of series connection 1with load reactance device L 1;
Described load branch II comprises the K switch of series connection 2with load reactance device L 2;
After described load branch I and described load branch II parallel connection, its two ends meet respectively change-over switch K t1with change-over switch K t2.
Wherein, described charge power supply is connected in parallel on described load circuit two ends;
The positive pole of described charge power supply is by described contactor K and change-over switch K t1connect, after its minus earth with terminal U 2connect.
Compared with the prior art, the beneficial effects of the utility model are:
1, method provided by the invention is by the cooperation of hookup and control system, some (≤5) individual pulse width excess current stress adjustable, that interpulse period is adjustable is put on tested converter valve MMC valve, make the tested converter valve tolerance transient current suitable with actual excess current operating mode, heat and the loss intensity of transient state, the test examination of realization to tested valve accident operating condition, and test method provided by the invention is convenient, simple for the realization of different tests mode, very favourable for the security of test unit;
2, the excess current of flexible DC power transmission MMC valve provided by the invention is turn-offed the requirement that test method meets MMC valve excess current shutoff test fully, can provide Transient Thermal intensity, transient fault strength of current, transient state high-voltage strength, accessory circuit loss intensity, current changing rate (di/dt) intensity, voltage change ratio (dv/dt) intensity that same actual operating mode is suitable, for actual condition provides foundation.
The accompanying drawing explanation
The electrical structure diagram of the MMC valve that Fig. 1 provides for the utility model.
The excess current that Fig. 2 provides for the utility model is closed the electric topological diagram of breaking test device.In figure, A 1end is the first submodule high-voltage output end; A 2end is the second submodule high-voltage output end; B 1end is the second submodule capacitor high voltage end; B 2end is the second submodule low-voltage output; C sM1, C sM1be respectively the electric capacity of the first submodule and the second submodule; D 11, D 12be the resistance of the first submodule; T 11, T 12be IGBT module, the D of the first submodule 21, D 22be the resistance of the second submodule; T 21, T 22it is the IGBT module of the second submodule; K t1, K t2for change-over switch; D 1, U 1, D 2, U 2be respectively terminal; K 1, K 2be respectively the switch of load branch I and load branch II; L 1, L 2be respectively the load reactance device of load branch I and load branch II; K is contactor; E is charge power supply.
The excess current that Fig. 3 provides for the utility model is closed the triggering sequential chart of breaking test device test product valve.
The excess current that Fig. 4 provides for the utility model is closed breaking test device test product valve test waveform figure.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
The utility model is that the test valve causes that for meeting it is correct that IGBT drives the design of maximum current, voltage and temperature stress effect under the excess current operating condition of protecting.
The excess current of a kind of flexible DC power transmission MMC valve that the present embodiment proposes is closed breaking test device, comprises the test product valve, change-over switch, load circuit, contactor and the charge power supply that connect successively.
Wherein, test product valve comprises the first submodule and second submodule of series connection;
Described the first submodule comprises IGBT module T 11, IGBT module T 12, resistance D 11, resistance D 12and capacitor C sM1; Described IGBT module T 11with described IGBT module T 12the series connection after with described capacitor C sM1parallel connection, described resistance D 11with described resistance D 12the series connection after with described capacitor C sM1in parallel;
The second submodule comprises IGBT module T 21, IGBT module T 22, resistance D 21, resistance D 22and capacitor C sM2; Described IGBT module T 21with described IGBT module T 22the series connection after with described capacitor C sM2parallel connection, described resistance D 21with described resistance D 22the series connection after with described capacitor C sM2in parallel;
The IGBT module T of described series connection 11with IGBT module T 12the intermediate point leading-out terminal, be the high-voltage output end of the first submodule;
The IGBT module T of described series connection 21with IGBT module T 22intermediate point and described IGBT module T 12connect, and leading-out terminal, be the second submodule high-voltage output end;
Described capacitor C sM2anodal leading-out terminal, be the second submodule capacitor high voltage end;
Described capacitor C sM2the negative pole leading-out terminal, be the second submodule low-voltage output.
Described IGBT module T 11, IGBT module T 12, IGBT module T 21with IGBT module T 22include antiparallel diode and IGBT.
The change-over switch of the present embodiment comprises change-over switch K t1with change-over switch K t2;
Described change-over switch K t1two terminals of corresponding configuration, terminal D 1with terminal U 1; Described terminal D 1with the second submodule capacitor high voltage end, be connected; Described terminal U 1with the first submodule high-voltage output end, be connected;
Described change-over switch K t2two terminals of corresponding configuration, terminal D 2with terminal U 2; Described terminal D 2with the second submodule high-voltage output end, be connected; Described terminal U 2with the second submodule low-voltage output, be connected;
Described change-over switch K t1with described change-over switch K t2interlock.
The load circuit of the present embodiment comprises load branch I and load branch II;
Described load branch I comprises the K switch of series connection 1with load reactance device L 1;
Described load branch II comprises the K switch of series connection 2with load reactance device L 2;
After described load branch I and described load branch II parallel connection, its two ends meet respectively change-over switch K t1with change-over switch K t2.
The charge power supply of the present embodiment is connected in parallel on described load circuit two ends;
The positive pole of described charge power supply is by described contactor K and change-over switch K t1connect, after its minus earth with terminal U 2connect.
The present embodiment provides a kind of excess current of flexible DC power transmission MMC valve to turn-off test method again, and described method comprises the steps:
(1) test product valve being connected with charge power supply with load circuit, is the test product valve charging;
Concrete steps are: by change-over switch K t1be connected change-over switch K with the high-voltage output end of test product valve the first submodule t2be connected with the low-voltage output of test product valve the second submodule, drop into charge circuit, give the first submodule and the charging of the second submodule of test product valve, until disconnect described change-over switch K after testing requirements voltage t1with described change-over switch K t2.
(2) the current peak size be set based on the test is selected the load reactance device of load circuit;
Concrete steps are:
1) the judgement test needs the size of current of use, if large electric current is selected the load reactance device L of load circuit 1if little electric current is selected the load reactance device L of load circuit 2;
2) select load reactance device L 1or load reactance device L 2, the load switch that closed pair is answered.Load reactance device L wherein 1value be less than load reactance device L 2value, load reactance device L 1value and load reactance device L 2value all according to testing requirements, set.
(3) select the subjects of test product valve according to test objective, and by the corresponding change of the change-over switch of load circuit;
Concrete steps are:
Pipe IGBT module T on the second submodule that 1. if subjects is described test product valve 21, change-over switch K t1be connected change-over switch K with the capacitor high voltage end of test product valve the first submodule t2with the high-voltage output end of test product valve the second submodule, be connected;
Pipe IGBT module T under the second submodule that 2. if subjects is described test product valve 22, keep change-over switch K t1with change-over switch K t2invariant position.
(4), according to the subjects of the time trigger test product valve of setting, detect the withstand voltage degree of test product valve.
As shown in Figure 3, its transverse axis is time (t) to the triggering sequential chart of setting, the amplitude that the longitudinal axis is switching value, 0 and 1.Concrete steps are:
<1>t of on-test 0=0 constantly, triggers the IGBT as subjects, and pulse width is Δ t 1; Δ t 1scope be 0～50 μ s, it is determined according to testing requirements.
<2>through Δ t 2after time, t 1constantly again trigger the IGBT as subjects, pulse width is Δ t 1; Δ t 2scope be 0～10ms, it is determined according to testing requirements.
<3>through Δ t 2after time, t 2constantly again trigger the IGBT as subjects, pulse width is still Δ t 1;
<4 > repeating step<3 > n time, the withstand voltage degree of detection test product valve, and record.N time, the scope of its frequency n is determined according to testing requirements, but n≤5.
As shown in Figure 4, it closes breaking test device test product valve test waveform figure for excess current.As can be seen from the figure, Current rise, to the level of protection of device, drives protection to make the device locking, has reached the purpose of protection device; Can, in single test, repeatedly repeat the locking process according to testing requirements simultaneously.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment, the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.

Claims (6)

1. the excess current of a flexible DC power transmission MMC valve is closed breaking test device, it is characterized in that, described device comprises test product valve, change-over switch, load circuit, contactor and the charge power supply connected successively.
2. excess current as claimed in claim 1 is closed breaking test device, it is characterized in that, described test product valve comprises the first submodule and second submodule of series connection;
Described the first submodule comprises IGBT module T 11, IGBT module T 12, resistance D 11, resistance D 12and capacitor C sM1; Described IGBT module T 11with described IGBT module T 12the series connection after with described capacitor C sM1parallel connection, described resistance D 11with described resistance D 12the series connection after with described capacitor C sM1in parallel;
The second submodule comprises IGBT module T 21, IGBT module T 22, resistance D 21, resistance D 22and capacitor C sM2; Described IGBT module T 21with described IGBT module T 22the series connection after with described capacitor C sM2parallel connection, described resistance D 21with described resistance D 22the series connection after with described capacitor C sM2in parallel;
The IGBT module T of described series connection 11with IGBT module T 12the intermediate point leading-out terminal, be the high-voltage output end of the first submodule;
The IGBT module T of described series connection 21with IGBT module T 22intermediate point and described IGBT module T 12connect, and leading-out terminal, be the second submodule high-voltage output end;
Described capacitor C sM2anodal leading-out terminal, be the second submodule capacitor high voltage end;
Described capacitor C sM2the negative pole leading-out terminal, be the second submodule low-voltage output.
3. excess current as claimed in claim 2 is closed breaking test device, it is characterized in that described IGBT module T 11, IGBT module T 12, IGBT module T 21with IGBT module T 22include antiparallel diode and IGBT.
4. excess current as claimed in claim 2 is closed breaking test device, it is characterized in that, described change-over switch comprises change-over switch K t1with change-over switch K t2;
Described change-over switch K t1two terminals of corresponding configuration, terminal D 1with terminal U 1; Described terminal D 1with the second submodule capacitor high voltage end, be connected; Described terminal U 1with the first submodule high-voltage output end, be connected;
Described change-over switch K t2two terminals of corresponding configuration, terminal D 2with terminal U 2; Described terminal D 2with the second submodule high-voltage output end, be connected; Described terminal U 2with the second submodule low-voltage output, be connected;
Described change-over switch K t1with described change-over switch K t2interlock.
5. excess current as claimed in claim 4 is closed breaking test device, it is characterized in that, described load circuit comprises load branch I and load branch II;
Described load branch I comprises the K switch of series connection 1with load reactance device L 1;
Described load branch II comprises the K switch of series connection 2with load reactance device L 2;
After described load branch I and described load branch II parallel connection, its two ends meet respectively change-over switch K t1with change-over switch K t2.
6. excess current as claimed in claim 4 is closed breaking test device, it is characterized in that, described charge power supply is connected in parallel on described load circuit two ends;
The positive pole of described charge power supply is by described contactor K and change-over switch K t1connect, after its minus earth with terminal U 2connect.
CN 201220614194 2012-11-19 2012-11-19 Over-current turn-off test device for flexible direct current power transmission MMC valve Expired - Lifetime CN203101587U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103645399A (en) * 2013-11-30 2014-03-19 许继电气股份有限公司 Converter valve submodule automatic test system and thyristor test circuit thereof
CN103715935A (en) * 2013-11-27 2014-04-09 国家电网公司 Modularized multi-level voltage source type converter-based loss determination method
CN103728508A (en) * 2013-12-05 2014-04-16 国家电网公司 Device and method for testing steady-state operation of MMC flexible direct current sub-module
CN104422836A (en) * 2013-09-09 2015-03-18 南京南瑞继保电气有限公司 Overcurrent cut-off test circuit as well as control method thereof
CN107370393A (en) * 2017-06-29 2017-11-21 全球能源互联网研究院 A kind of Modularized multi-level converter sub-module topological structure and its guard method
CN108258667A (en) * 2018-02-12 2018-07-06 中国电力科学研究院有限公司 A kind of stage overcurrent protection method of multiterminal flexible direct current system and system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104422836A (en) * 2013-09-09 2015-03-18 南京南瑞继保电气有限公司 Overcurrent cut-off test circuit as well as control method thereof
CN103715935A (en) * 2013-11-27 2014-04-09 国家电网公司 Modularized multi-level voltage source type converter-based loss determination method
CN103715935B (en) * 2013-11-27 2016-09-28 国家电网公司 A kind of loss based on modular multilevel voltage source converter determines method
CN103645399A (en) * 2013-11-30 2014-03-19 许继电气股份有限公司 Converter valve submodule automatic test system and thyristor test circuit thereof
CN103645399B (en) * 2013-11-30 2016-04-20 许继电气股份有限公司 A kind of converter valve submodule Auto-Test System and thyristor test circuit thereof
CN103728508A (en) * 2013-12-05 2014-04-16 国家电网公司 Device and method for testing steady-state operation of MMC flexible direct current sub-module
CN107370393A (en) * 2017-06-29 2017-11-21 全球能源互联网研究院 A kind of Modularized multi-level converter sub-module topological structure and its guard method
CN108258667A (en) * 2018-02-12 2018-07-06 中国电力科学研究院有限公司 A kind of stage overcurrent protection method of multiterminal flexible direct current system and system

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Address after: 102209 Beijing City, Changping District science and Technology Park in the future smart grid research institute hospital

Co-patentee after: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd.

Patentee after: GLOBAL ENERGY INTERCONNECTION Research Institute

Co-patentee after: State Grid Corporation of China

Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city)

Co-patentee before: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd.

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Address after: 102209 Beijing City, Changping District science and Technology Park in the future smart grid research institute hospital

Co-patentee after: State Grid Corporation of China

Patentee after: GLOBAL ENERGY INTERCONNECTION Research Institute

Address before: 102209 Beijing City, Changping District science and Technology Park in the future smart grid research institute hospital

Co-patentee before: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd.

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