CN102662145B - Detection method for modular multi-level converter (MMC) steady state operation tester - Google Patents
Detection method for modular multi-level converter (MMC) steady state operation tester Download PDFInfo
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- CN102662145B CN102662145B CN201210137910.5A CN201210137910A CN102662145B CN 102662145 B CN102662145 B CN 102662145B CN 201210137910 A CN201210137910 A CN 201210137910A CN 102662145 B CN102662145 B CN 102662145B
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 76
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 230000000295 complement effect Effects 0.000 claims description 13
- 238000007689 inspection Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion 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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a detection method for a modular multi-level converter (MMC) steady state operation tester. The tester comprises a valve component 1, a valve component 2, a charging source E1, an energy complementing source E2, a load reactor L, a charging current-limiting resistor R, a control system, and a measurement and acquisition cabinet, wherein the valve component 1 and the valve component 2 are connected with the charging current-limiting resistor R through the serially connected load reactor L; the charging source E1 and the energy complementing source E2 are connected with the valve component 1; and the valve component 1 and the valve component 2 are connected with the control system. The method comprises the following steps: (1) detecting a cooling circuit; (2) detecting the isolation of a valve tower; (3) detecting average pressure tests; (4) detecting communication; (5) detecting control; and (6) performing a system test. By the method, whether the functions of the MMC steady state operation tester are complete and perfect can be detected, and equipment safety can be ensured in the debugging process.
Description
Technical field
The present invention relates to field of power, be specifically related to a kind of detection method of MMC valve Tests at Steady State device.
Background technology
Flexible DC power transmission (VSC-HVDC) technology has a wide range of applications in high-voltage dc transmission electrical domain, based on the VSC-HVDC of modularization multi-level converter (MMC), be realize utilizing IGBT valve to carry out a kind of mode of direct current transportation, its core component is called MMC valve.
The object of MMC valve Tests at Steady State is to investigate the tolerance of valve module for critical stress such as the electric current under long-term actual operating mode, voltage and heat, and this is also the important component part of the reliable Journal of Sex Research of transverter.Tests at Steady State device can produce the voltage, electric current and the thermal stress that are equivalent to actual condition, and these stress is produced by the energy exchange between two groups of MMC valve.The MMC valve one that two groups of structures are identical is used as auxiliary valve, and another is used as test product valve, and MMC valve electrical structure as shown in Figure 1.
The core of Tests at Steady State device debugging is auxiliary valve, after having been assembled by MMC auxiliary valve, needs to carry out special function debugging to it, ensures that its various functions is complete, perfect.If do not carry out test just MMC valve to be come into operation, may damage due to electric current, voltage capacity deficiency or accessory circuit and cause whole device to be damaged, jeopardize whole electric power netting safe running.
Summary of the invention
For the problem of prior art, the invention provides a kind of detection method of MMC valve Tests at Steady State device, determine that whether the function of auxiliary valve and whole test unit is complete, perfect.Get ready for whole device is come into operation, ensure the safety of equipment in debug process.
The detection method of a kind of MMC valve Tests at Steady State device provided by the invention, described test unit comprises valve module 1, valve module 2, charge power supply E1, complementary energy power supply E2, load reactance device L, charging current limiter resistance R, control system, measurement collection cabinet;
Described valve module 1 is connected with charging current limiter resistance R with the described load reactance device L of described valve module 2 by series connection; Described charge power supply E1 is connected with described valve module 1 respectively with complementary energy power supply E2; Described valve module 1 is connected with described control system respectively with described valve module 2; Its improvements are,
Described method comprises the steps:
(1) cooling circuit detects;
(2) valve tower Insulation monitoring;
(3) all testing inspection is pressed;
(4) communication detection;
(5) control to detect; With
(6) system testing.
Wherein, described valve module 1 is test product valve or auxiliary valve; Described valve module 2 is auxiliary valve or test product valve, corresponding to valve module 1.
Wherein, it is whether the cooling circuit that detection MMC valve is equipped with is normal that described step (1) cooling circuit detects, comprise the steps: to apply specified pressure, detect the phenomenon whether described cooling circuit exists seepage, whether the correlation parameter of heat eliminating medium can meet the demands.
Wherein, described step (2) valve tower Insulation monitoring comprises: carry out power frequency and in short-term DC voltage withstand test in short-term to described MMC valve, judges whether it meets according to insulating requirements.
Wherein, described step (3) all presses testing inspection to comprise: apply operating voltage to auxiliary valve, measure the voltage on each submodule of auxiliary valve respectively, judges whether the difference of maximum voltage on submodule and minimum voltage is less than certain limit.
Wherein, described step (4) communication detection comprises:
1) whether the communication of control system inspection and each submodule is normal;
2) set up communication, simulated failure, check that whether the return display of control system is correct, the validity of checking safeguard measure.
Wherein, described step (5) control detection comprises: charge to auxiliary valve; Control system sends trigger pulse according to activation schedule to auxiliary valve, observes the stepped voltage waveform whether auxiliary valve exports expection.
Wherein, described step (6) system testing comprises: when charge power supply completes precharge, complementary energy power supply input is carried out mechanical back to back test; Whether be stepped voltage waveform, whether electric current is sinusoidal current if observing two-part voltage waveform.Test needs continue for some time, and whether viewing test is stablized.
Wherein, the correlation parameter of described heat eliminating medium comprises: discharge, heat radiation power, inflow temperature and leaving water temperature.
Wherein, described valve tower power frequency in short-term and in short-term DC voltage withstand test comprise: industrial frequency AC withstand voltage test in 1 minute and 1 minute DC voltage withstand test.
Wherein, described certain limit is-5%-+5%.
Wherein, described safeguard measure comprises: valve base controller bypass protection and master controller protection.
Wherein, auxiliary valve, when not having test product valve, is divided into symmetrical two parts by described step (6), is connected by reactor.
Compared with the prior art, beneficial effect of the present invention is:
Do according to operation of the present invention successively, save the time.
Do according to operation of the present invention successively, effectively can reduce the requirement of device detection for additional power source capacity.
Do according to operation of the present invention successively, effectively can reduce the requirement of device detection for additional testing equipment.
The present invention can verify that whether the function of MMC valve Tests at Steady State device is complete, perfect, and can ensure the safety of equipment in debug process.
Accompanying drawing explanation
Fig. 1 is the electrical structure diagram of MMC valve provided by the invention.
Fig. 2 is the electric topology figure of MMC valve Tests at Steady State device provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As shown in Figure 2, test unit comprises valve module 1, valve module 2, charge power supply E1, complementary energy power supply E2, load reactance device L, charging current limiter resistance R, control system, measurement collection cabinet to the electric topology figure of the MMC valve Tests at Steady State device of the present embodiment; Valve module 1 is connected with charging current limiter resistance R with the load reactance device L of valve module 2 by series connection; Charge power supply E1 is connected with valve module 1 respectively with complementary energy power supply E2; Valve module 1 is connected with control system respectively with valve module 2; Valve module 1 and 2 is respectively containing n and m submodule, and n>=m; Submodule comprises half-bridge structure in parallel and submodule capacitor; Or submodule comprises H bridge construction in parallel and submodule capacitor; Submodule capacitor is C
sM1nor C
sM2m; Half-bridge structure and H bridge construction include K switch
nor K
m, resistance R
nor R
m, thyristor T
nor T
m, IGBT device T
n1and T
n2or IGBT device T
m1and T
m2and diode D
n1and D
n2or diode D
m1and D
m2; Illustrate for n submodule, IGBT device T
1n1anti-paralleled diode D
1n1composition IGBT module 1; IGBT device T
1n2anti-paralleled diode D
1n2composition IGBT module 2; IGBT module 1 and IGBT module 2 are connected, composition IGBT module 1 and IGBT module 2 series arm; IGBT module 2, thyristor T
1nand K switch
1nin parallel successively; Resistance R
1nin parallel with IGBT module 1 and IGBT module 2 series arm.
The positive pole of charge power supply E1 is connected with the high-voltage output end of valve module 1; The negative pole of described charge power supply E1 and valve module 1 with 2 low-voltage output be connected after ground connection; The positive pole of complementary energy power supply E2 is connected with the high-voltage output end of valve module 1; The negative pole of complementary energy power supply E2 and valve module 1 with 2 low-voltage output be connected after ground connection.
The valve module 1 of the present embodiment can be test product valve or auxiliary valve, and valve module 2 can be auxiliary valve or test product valve is corresponding with valve module 1, the present embodiment with valve module 1 for auxiliary valve, valve module 2 for test product valve be example.
To above-mentioned test unit, the present embodiment proposes a kind of detection method of MMC valve Tests at Steady State device, comprises the steps:
(1) cooling circuit detects;
It is whether the cooling circuit that detection MMC valve is equipped with is normal that cooling circuit detects, and comprise the steps: to apply specified pressure, detect the phenomenon whether described cooling circuit exists seepage, whether the correlation parameter of heat eliminating medium can meet the demands.The correlation parameter of its heat eliminating medium comprises: discharge, heat radiation power, inflow temperature and leaving water temperature.The requirement that need meet is: discharge >=13.5T/h; Heat radiation power >=60kW; Inflow temperature≤50 ° C, leaving water temperature≤60 ° C.This is the first step of systems axiol-ogy work, and follow-up detection needs to carry out when cooling circuit work.
(2) valve tower Insulation monitoring;
Valve tower Insulation monitoring comprises: only keep cooling circuit work, carry out power frequency and in short-term DC voltage withstand test in short-term to described MMC valve, judges whether it meets according to insulating requirements.
Described power frequency in short-term and in short-term DC voltage withstand test comprise: industrial frequency AC withstand voltage test in 1 minute and 1 minute DC voltage withstand test.
(3) all testing inspection is pressed;
All press testing inspection to comprise: on the basis that Insulation Test is passed through, to apply operating voltage to auxiliary valve, measure the voltage on each submodule of auxiliary valve respectively, judge whether the difference of maximum voltage on submodule and minimum voltage is less than certain limit.Certain limit is-5%-+5%.It is qualified to belong within scope.
(4) communication detection;
Communication detection comprises:
1) when valve communication unit electronic circuit is charged, whether the communication of control system inspection and each submodule is normal;
2) set up communication, simulated failure, check that whether the return display of control system is correct, the validity of checking safeguard measure.
Safeguard measure comprises: valve base controller bypass protection and master controller protection.
(5) control to detect;
Control detection comprises: to auxiliary valve charging, fill certain voltage; Complementary energy power-supply system and load do not drop into; Control system sends trigger pulse according to activation schedule to auxiliary valve, observes the stepped voltage waveform whether auxiliary valve exports expection.Owing to not having load not form loop, so there is no electric current and energy loss generation, be equivalent to no-load test.It can access control system to the controlling functions of valve.
(6) system testing.
System testing comprises: when charge power supply completes precharge, complementary energy power supply input is carried out mechanical back to back test; Whether be stepped voltage waveform, whether electric current is sinusoidal current if observing two-part voltage waveform.Test needs continue for some time, and whether viewing test is stablized.When not having test product valve, auxiliary valve is divided into symmetrical two parts, be connected by reactor, half is equivalent to auxiliary valve (valve module 1 in Fig. 2), half is equivalent to test product valve (valve module 2 in Fig. 2).
Wherein, mechanical back to back test is; Auxiliary valve is divided into symmetrical two parts, be connected by reactor, half as auxiliary valve, half as test product valve, first the submodule capacitor of auxiliary valve and test product valve is charged, charge power supply is disconnected after charging, drop into complementary energy power supply, make by the control of controller the simple alternating current test current producing superposition direct current biasing in loop.
By above debugging step, can determine that whether the function of auxiliary valve and whole test unit is complete, perfect.The auxiliary valve debugged by said system and test unit, can carry out certification test to test product valve.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (11)
1. a detection method for MMC valve Tests at Steady State device, described test unit comprises valve module 1, valve module 2, charge power supply E1, complementary energy power supply E2, load reactance device L, charging current limiter resistance R, control system, measurement collection cabinet;
Described valve module 1 is connected with charging current limiter resistance R with the described load reactance device L of described valve module 2 by series connection; Described charge power supply E1 is connected with described valve module 1 respectively with complementary energy power supply E2; Described valve module 1 is connected with described control system respectively with described valve module 2; It is characterized in that,
Described method comprises the steps:
(1) cooling circuit detects;
(2) valve tower Insulation monitoring;
(3) all testing inspection is pressed;
(4) communication detection;
(5) control to detect; With
(6) system testing;
It is whether the cooling circuit that detection MMC valve is equipped with is normal that described step (1) cooling circuit detects, comprise the steps: to apply specified pressure, detect the phenomenon whether described cooling circuit exists seepage, whether the correlation parameter of heat eliminating medium can meet the demands;
The correlation parameter of described heat eliminating medium comprises: discharge, heat radiation power, inflow temperature and leaving water temperature.
2. detection method as claimed in claim 1, it is characterized in that, described valve module 1 is test product valve or auxiliary valve; Described valve module 2 is auxiliary valve or test product valve, corresponding to valve module 1.
3. detection method as claimed in claim 1, it is characterized in that, described step (2) valve tower Insulation monitoring comprises: carry out power frequency and in short-term DC voltage withstand test in short-term to described MMC valve, judges whether it meets according to insulating requirements.
4. detection method as claimed in claim 1, it is characterized in that, described step (3) all presses testing inspection to comprise: apply operating voltage to auxiliary valve, measure the voltage on each submodule of auxiliary valve respectively, judge whether the difference of maximum voltage on submodule and minimum voltage is less than certain limit.
5. detection method as claimed in claim 1, it is characterized in that, described step (4) communication detection comprises:
1) whether the communication of control system inspection and each submodule is normal;
2) set up communication, simulated failure, check that whether the return display of control system is correct, the validity of checking safeguard measure.
6. detection method as claimed in claim 1, is characterized in that, described step (5) controls detection and comprises: charge to auxiliary valve; Control system sends trigger pulse according to activation schedule to auxiliary valve, observes the stepped voltage waveform whether auxiliary valve exports expection.
7. detection method as claimed in claim 1, it is characterized in that, described step (6) system testing comprises: when charge power supply completes precharge, complementary energy power supply input is carried out mechanical back to back test; Whether be stepped voltage waveform, whether electric current is sinusoidal current if observing two-part voltage waveform.Test needs continue for some time, and whether viewing test is stablized.
8. detection method as claimed in claim 3, is characterized in that, the power frequency in short-term of described valve tower and in short-term DC voltage withstand test comprise: industrial frequency AC withstand voltage test in 1 minute and 1 minute DC voltage withstand test.
9. detection method as claimed in claim 4, it is characterized in that, described certain limit is-5%-+5%.
10. detection method as claimed in claim 5, it is characterized in that, described safeguard measure comprises: valve base controller bypass protection and master controller protection.
11. detection methods as claimed in claim 7, is characterized in that, auxiliary valve, when not having test product valve, is divided into symmetrical two parts by described step (6), is connected by reactor.
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| CN201210137910.5A CN102662145B (en) | 2012-05-04 | 2012-05-04 | Detection method for modular multi-level converter (MMC) steady state operation tester |
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| CN201210137910.5A CN102662145B (en) | 2012-05-04 | 2012-05-04 | Detection method for modular multi-level converter (MMC) steady state operation tester |
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| CN102662145B true CN102662145B (en) | 2014-12-31 |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103018663B (en) * | 2012-11-19 | 2014-12-31 | 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 |
| CN103063945B (en) * | 2012-12-11 | 2015-01-21 | 国网智能电网研究院 | Flexible direct current transmission sub-module test device and test method thereof |
| CN103048502B (en) * | 2012-12-11 | 2015-04-29 | 国网智能电网研究院 | Control protection system of valve steady-state operation test device of shutoff device |
| CN103064016B (en) * | 2012-12-11 | 2015-05-06 | 国家电网公司 | Fault protection method for steady-state operation testing apparatus of modular multilevel converter (MMC) valve |
| CN103051213B (en) * | 2012-12-11 | 2014-12-17 | 国网智能电网研究院 | Energy replenishing power supply system and control method thereof for MMC valve |
| CN103048596B (en) * | 2012-12-14 | 2015-05-13 | 国网智能电网研究院 | End-to-end direct-current voltage withstand testing device and method of MMC (modular multilevel converter) valve |
| CN103197167A (en) * | 2013-02-20 | 2013-07-10 | 国网智能电网研究院 | Parameter design method for load electric reactor of maximum metal condition (MMC) valve steady-state operation testing device |
| CN103163459B (en) * | 2013-02-20 | 2016-05-25 | 国网智能电网研究院 | Method is exited in a kind of startup of MMC valve Tests at Steady State device |
| CN103197271B (en) * | 2013-02-25 | 2016-01-20 | 国网智能电网研究院 | A kind of method of inspection of MMC topological flexibility direct current transportation test platform |
| 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 |
| CN108279378B (en) * | 2017-12-29 | 2022-03-18 | 中电普瑞电力工程有限公司 | Steady-state test device and method for modular multi-level converter valve |
| CN109358241B (en) * | 2018-09-26 | 2021-02-09 | 南方电网科学研究院有限责任公司 | Flexible direct current transmission converter valve detection system and method |
| CN111505419B (en) * | 2020-04-28 | 2022-06-17 | 南方电网科学研究院有限责任公司 | Opposite impact test circuit for SiC MMC valve section and control method, system and equipment thereof |
| 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 |
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Effective date of registration: 20140218 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: STATE GRID INTELLIGENT GRID RESEARCH INSTITUTE Applicant after: China-EPRI Electric Power Engineering Co., Ltd. Address before: 102200 Beijing city Changping District South Shao Zhen Nan Road No. 16 Applicant before: China-EPRI Electric Power Engineering Co., Ltd. |
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Effective date of registration: 20170524 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: China-EPRI Electric Power Engineering Co., Ltd. Patentee after: State Grid Corporation of China Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: STATE GRID INTELLIGENT GRID RESEARCH INSTITUTE Patentee before: State Grid Corporation of China Co-patentee before: China-EPRI Electric Power Engineering Co., Ltd. |