CN202230181U - Power ring test apparatus for flexible DC power transmission MMC valve stable state operation test - Google Patents
Power ring test apparatus for flexible DC power transmission MMC valve stable state operation test Download PDFInfo
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- CN202230181U CN202230181U CN2011203107572U CN201120310757U CN202230181U CN 202230181 U CN202230181 U CN 202230181U CN 2011203107572 U CN2011203107572 U CN 2011203107572U CN 201120310757 U CN201120310757 U CN 201120310757U CN 202230181 U CN202230181 U CN 202230181U
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 238000007600 charging Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 27
- 230000000295 complement effect Effects 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 12
- 238000010998 test method Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract 1
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- 238000005516 engineering process Methods 0.000 description 3
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Abstract
The utility model relates to the technical field of flexible DC power transmission and power electronic application, in particular to a power ring test apparatus for a flexible DC power transmission MMC valve stable state operation test, comprising two valve assemblies 1 and 2, a charging power supply E1, an energy complementing power supply E2, a load reactor L, a charging current-limiting resistor Rc, and disconnecting switches K1 and K2, wherein the low voltage output end of the valve assembly 1 is directly connected with the low voltage output end of the valve assembly 2, and the high voltage output end of the valve assembly 1 is connected with the high voltage output end of the valve assembly 2 through the load reactor L. The power ring test apparatus enables the operation voltage, current and heat intensity under real working conditions on a tested valve segment to be equivalently reproduced in cooperation with a test method, is simple and flexible in circuit topological structure, and simple and convenient in parameter adjusting mode, and can satisfy the demands of the MMC valve stable state operation test.
Description
Technical field
The invention belongs to flexible DC power transmission and power electronics applied technical field, specifically relate to the power ring test unit of flexible DC power transmission MMC valve Tests at Steady State.
Background technology
Along with the progressively application of flexible DC power transmission (VSC-HVDC) technology in electric system, the reliability of its core component---high-power insulated gate bipolar transistor (IGBT) valve becomes one of key factor of power system security.Because the VSC-HVDC device generally has high voltage, heavy current, jumbo characteristics, cause in experimental enviroment, being difficult to make up the full live road identical and make an experiment with actual operating mode.Therefore, how in experimental enviroment, to make up the hookup of equivalence, carry out the test suitable and become the key of dealing with problems with actual operating mode intensity.
Based on the VSC-HVDC of modularization multi-level converter (MMC), be to utilize the IGBT valve to carry out a kind of new technology of direct current transportation.Submodule (SM) is the minimum power unit that constitutes MMC, and the half-bridge that it is made up of IGBT (perhaps H bridge) composes in parallel with capacitor.Experimental process module series connection constitutes a MMC valve module, and the electrical specification that it can proportional embodiment MMC valve is the basic electric unit that carries out MMC valve Tests at Steady State.
MMC valve Tests at Steady State is in order to investigate MMC valve tolerance to critical stress such as maximum current, voltage and temperature under long-term actual operating mode, with the correctness of checking MMC valve design.
The utility model content
The purpose of the utility model is to provide the power ring test unit of flexible DC power transmission MMC valve Tests at Steady State, and this test unit combines test method to be implemented in by working voltage, electric current and hot strength under the equivalence reproduction actual condition on the examination valve section; And the circuit topological structure of this test unit is simple, flexible, and the parameter regulation mode is easy, can satisfy the requirement of MMC valve section Tests at Steady State.
The purpose of the utility model is to adopt following technical proposals to realize:
The power ring test unit of flexible DC power transmission MMC valve Tests at Steady State; Its improvements are that said power ring test unit comprises two valve modules 1 and 2, charge power supply E1, complementary energy power supply E2, load reactance device L, charging current limiter resistance R c and disconnector K1 and K2; The low-voltage output of said valve module 1 directly links to each other with the low-voltage output of valve module 2; The high-voltage output end of said valve module 1 links to each other through said load reactance device L with valve module 2 high-voltage output ends.
A kind of optimized technical scheme that the utility model provides is: the end of said charge power supply E1 is connected with said charging current limiter resistance R c one end; The other end of said charge power supply E1 and the valve module 1 back ground connection that links to each other with 2 low-voltage output; The said charging current limiter resistance R c other end is connected with the end of disconnector K1; The other end of said disconnector K1 is connected with said load reactance device L.
Second optimized technical scheme that the utility model provides is: the end end of said complementary energy power supply E2 is connected with said disconnector K2 one end; The other end of said complementary energy power supply E2 and the valve module 1 back ground connection that links to each other with 2 low-voltage output; The other end of said disconnector K2 is connected with valve module 1.
The 3rd optimized technical scheme that the utility model provides is: said valve module 1 comprises the submodule of n series connection; Said submodule comprises the half-bridge structure and the submodule capacitor of parallel connection; Or said submodule comprises the H bridge construction and the submodule capacitor of parallel connection; Said submodule capacitor is C
SM1n
Said half-bridge and H bridge construction include K switch
1n, resistance R
1n, thyristor T1n, IGBT device T
1n1And T
1n2And diode D
1n1And D
1n2
Said IGBT device T
1n1Inverse parallel diode D
1n1 Form IGBT module 1; Said IGBT device T
1n2Inverse parallel diode D
1n2 Form IGBT module 2; Said IGBT module 1 and 2 series connection of IGBT module are formed IGBT module 1 and IGBT module 2 series arms;
Said IGBT module 2, thyristor T
1nAnd K switch
1nParallel connection successively; Said resistance R
1nParallelly connected with IGBT module 1 and IGBT module 2 series arms.
The 4th optimized technical scheme that the utility model provides is: said complementary energy power supply E2 is connected in parallel on the ground connection submodule capacitor C of said valve module 1
SM1nTwo ends.
The 5th optimized technical scheme that the utility model provides is: said valve module 2 comprises the submodule of m series connection; Said submodule comprises the half-bridge structure and the submodule capacitor of parallel connection; Or said submodule comprises the H bridge construction and the submodule capacitor of parallel connection; Said submodule capacitor is C
SM2m
Said half-bridge and H bridge construction include K switch
2m, resistance R
2m, thyristor T
2m, IGBT device T
2m1And T
2m2And diode D
2m1And D
2m2
Said IGBT device T
2m1Inverse parallel diode D
2m1Form IGBT module 3; Said IGBT device T
2m2Inverse parallel diode D
2m2Form IGBT module 4; Said IGBT module 3 and 4 series connection of IGBT module;
Said IGBT module 4, thyristor T
2mAnd K switch
2mParallel connection successively; Said resistance R
2mParallelly connected with IGBT module 3 and IGBT module 4 series arms.
The 6th optimized technical scheme that the utility model provides is: said valve module 1 is auxiliary valve; Said valve module 2 is a test product valve.
Compared with prior art, the beneficial effect that reaches of the utility model is:
1, the test unit that provides of the utility model produces loop current through the energy exchange between valve module submodule capacitor and the load inductance; Power supply E2 only is used for the less active loss of supplementary circuitry operational process, greatly reduces the requirement of hookup to power supply capacity;
2, the complementary energy power supply E2 of the test unit that provides of the utility model is parallel to the ground connection submodule capacitor C of valve module 1
SM1nTwo ends can replenish the active loss that entire circuit is moved through certain control device;
3, the test unit that provides of the utility model can obtain the current stress of accurate AC and DC stack through regulating the amplitude and the phase differential of two valve module voltage, not only regulative mode flexibly, simple, and have higher equivalence;
4, the hookup that provides of the utility model satisfies the requirement of MMC valve Tests at Steady State, and steady-state current stress, voltage stress and the hot strength etc. suitable with actual operating mode can be provided.
Description of drawings
Fig. 1 is the circuit topology figure of power ring test unit of the flexible DC power transmission MMC valve Tests at Steady State of the utility model;
Fig. 2 is the voltage waveform view of the flexible DC power transmission MMC valve Tests at Steady State of the utility model;
Fig. 3 is the current waveform synoptic diagram of the flexible DC power transmission MMC valve Tests at Steady State of the utility model.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the utility model is done further detailed description.
The circuit topology figure of the power ring test unit of flexible DC power transmission MMC valve Tests at Steady State is as shown in Figure 1, and the said power ring test unit of this power ring test unit comprises two valve modules 1 and 2, charge power supply E1, complementary energy power supply E2, load reactance device L, charging current limiter resistance R c and disconnector K1 and K2; The low-voltage output of valve module 1 directly links to each other with the low-voltage output of valve module 2, and both high-voltage output ends link to each other through load reactance device L; Valve module 1 is an auxiliary valve; Valve module 2 is a test product valve.
The end of charge power supply E1 is connected with said charging current limiter resistance R c one end; The other end of charge power supply E1 and the valve module 1 back ground connection that links to each other with 2 low-voltage output; The charging current limiter resistance R c other end is connected with the end of disconnector K1; The other end of disconnector K1 is connected with said load reactance device L.
The end end of complementary energy power supply E2 is connected with disconnector K2 one end; The other end of complementary energy power supply E2 and the valve module 1 back ground connection that links to each other with 2 low-voltage output; The other end of disconnector K2 is connected with valve module 1; Complementary energy power supply E2 is connected in parallel on the ground connection submodule capacitor C of valve module 1
SM1nTwo ends.
The test method that this hookup is corresponding comprises the steps:
(1) the voltage magnitude V of setting valve module 1 and valve module 2
1, V
2And the two phase differential δ, and the output voltage of setting E2;
(2) closed K1 makes E1 to all submodule capacitor chargings;
(3) after group module capacitors voltage reaches setting value, break off K1 E1 is withdrawed from, precharge finishes;
(4) closed K2 drops into E2; Simultaneously, send the trigger pulse of two all submodule IGBT of valve module according to certain modulation strategy, circuit gets into the steady-state operation state.Valve module 1 is set up the required voltage stress of test with valve module 2 two ends, carries out energy exchange on two valve module submodule capacitors and the load reactance device L, produces in the loop and tests required current stress;
(5) break off K2, withdraw from E2, locking IGBT trigger pulse then, off-test.
The Tests at Steady State circuit is intended to produce on the valve module two kinds of stress: the one, and many level sine ladder wave voltage stress of adjustable band direct current biasing, the 2nd, the sine-wave current stress of adjustable band direct current biasing.During the circuit steady-state operation, the IGBT in valve module 1 and the valve module 2 is operated under the lower sine ladder wave modulation system of certain switching frequency, and two ends are with obtaining voltage waveform u as shown in Figure 2 respectively
1, u
2, the two AC compounent amplitude is respectively V
1And V
2, phase differential is δ, direct current biasing is
Through regulating V
1, V
2And δ, can change the AC compounent I of loop current i
AcWith DC component I
DcSize, its waveform synoptic diagram is as shown in Figure 3.
Should be noted that at last: above embodiment is only in order to explanation the application's technical scheme but not to the restriction of its protection domain; Although the application has been carried out detailed explanation with reference to the foregoing description; The those of ordinary skill in affiliated field is to be understood that: those skilled in the art still can carry out all changes, revise or be equal to replacement to the embodiment of application after reading the application; These changes, modification perhaps are equal to replacement, and it is all within the claim scope that its application is awaited the reply.
Claims (7)
1. the power ring test unit of flexible DC power transmission MMC valve Tests at Steady State; It is characterized in that said power ring test unit comprises two valve modules 1 and 2, charge power supply E1, complementary energy power supply E2, load reactance device L, charging current limiter resistance R c and disconnector K1 and K2; The low-voltage output of said valve module 1 directly links to each other with the low-voltage output of valve module 2; The high-voltage output end of said valve module 1 links to each other through said load reactance device L with valve module 2 high-voltage output ends.
2. power ring test unit as claimed in claim 1 is characterized in that, the end of said charge power supply E1 is connected with said charging current limiter resistance R c one end; The other end of said charge power supply E1 and the valve module 1 back ground connection that links to each other with 2 low-voltage output; The said charging current limiter resistance R c other end is connected with the end of disconnector K1; The other end of said disconnector K1 is connected with said load reactance device L.
3. power ring test unit as claimed in claim 1 is characterized in that, the end end of said complementary energy power supply E2 is connected with said disconnector K2 one end; The other end of said complementary energy power supply E2 and the valve module 1 back ground connection that links to each other with 2 low-voltage output; The other end of said disconnector K2 is connected with valve module 1.
4. power ring test unit as claimed in claim 1 is characterized in that, said valve module 1 comprises the submodule of n series connection; Said submodule comprises the half-bridge structure and the submodule capacitor of parallel connection; Or said submodule comprises the H bridge construction and the submodule capacitor of parallel connection; Said submodule capacitor is C
SM1n
Said half-bridge and H bridge construction include K switch
1n, resistance R
1n, thyristor T1n, IGBT device T
1n1And T
1n2And diode D
1n1And D
1n2
Said IGBT device T
1n1Inverse parallel diode D
1n1Form IGBT module 1; Said IGBT device T
1n2Inverse parallel diode D
1n2Form IGBT module 2; Said IGBT module 1 and 2 series connection of IGBT module are formed IGBT module 1 and IGBT module 2 series arms;
Said IGBT module 2, thyristor T
1nAnd K switch
1nParallel connection successively; Said resistance R
1nParallelly connected with IGBT module 1 and IGBT module 2 series arms.
5. power ring test unit as claimed in claim 3 is characterized in that, said complementary energy power supply E2 is connected in parallel on the ground connection submodule capacitor C of said valve module 1
SM1nTwo ends.
6. power ring test unit as claimed in claim 1 is characterized in that, said valve module 2 comprises the submodule of m series connection; Said submodule comprises the half-bridge structure and the submodule capacitor of parallel connection; Or said submodule comprises the H bridge construction and the submodule capacitor of parallel connection; Said submodule capacitor is C
SM2m
Said half-bridge and H bridge construction include K switch
2m, resistance R
2m, thyristor T
2m, IGBT device T
2m1And T
2m2And diode D
2m1And D
2m2
Said IGBT device T
2m1Inverse parallel diode D
2m1Form IGBT module 3; Said IGBT device T
2m2Inverse parallel diode D
2m2Form IGBT module 4; Said IGBT module 3 and 4 series connection of IGBT module;
Said IGBT module 4, thyristor T
2mAnd K switch
2mParallel connection successively; Said resistance R
2mParallelly connected with IGBT module 3 and IGBT module 4 series arms.
7. power ring test unit as claimed in claim 1 is characterized in that, said valve module 1 is an auxiliary valve; Said valve module 2 is a test product valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203107572U CN202230181U (en) | 2011-08-25 | 2011-08-25 | Power ring test apparatus for flexible DC power transmission MMC valve stable state operation test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203107572U CN202230181U (en) | 2011-08-25 | 2011-08-25 | Power ring test apparatus for flexible DC power transmission MMC valve stable state operation test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202230181U true CN202230181U (en) | 2012-05-23 |
Family
ID=46080765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203107572U Expired - Lifetime CN202230181U (en) | 2011-08-25 | 2011-08-25 | Power ring test apparatus for flexible DC power transmission MMC valve stable state operation test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202230181U (en) |
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| CN102680832A (en) * | 2012-05-24 | 2012-09-19 | 中国西电电气股份有限公司 | Test system and test method of transmission valve |
| CN102901889A (en) * | 2012-09-13 | 2013-01-30 | 国网智能电网研究院 | Operation testing device for voltage source type converter sub-module and testing method thereof |
| CN103018663A (en) * | 2012-11-19 | 2013-04-03 | 国网智能电网研究院 | Method and system for over-current cut-off test for flexible direct-current power transmission MMC (modularized multi-level converter) valve |
| CN103048502A (en) * | 2012-12-11 | 2013-04-17 | 国网智能电网研究院 | Control protection system of valve steady-state operation test device of shutoff device |
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-
2011
- 2011-08-25 CN CN2011203107572U patent/CN202230181U/en not_active Expired - Lifetime
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| CN111999574A (en) * | 2020-07-29 | 2020-11-27 | 许继集团有限公司 | MMC power module low-voltage pressurization testing device and method |
| CN112362980A (en) * | 2020-09-18 | 2021-02-12 | 许继集团有限公司 | Direct-current energy consumption valve power cycle test circuit and test method |
| CN112362980B (en) * | 2020-09-18 | 2023-11-17 | 许继集团有限公司 | Direct current energy consumption valve power cycle test circuit and test method |
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