CN102486498B - Composite test apparatus of high-voltage direct current transmission converter valve - Google Patents

Composite test apparatus of high-voltage direct current transmission converter valve Download PDF

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CN102486498B
CN102486498B CN201010576649.XA CN201010576649A CN102486498B CN 102486498 B CN102486498 B CN 102486498B CN 201010576649 A CN201010576649 A CN 201010576649A CN 102486498 B CN102486498 B CN 102486498B
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inductance
valve
auxiliary valve
high voltage
current
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CN102486498A (en
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汤广福
查鲲鹏
谢婷
高冲
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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Abstract

The invention relates to a composite test apparatus of a high-voltage direct current transmission converter valve. The composite test apparatus comprises a test valve Vt, a high voltage source (1), a high voltage source (2) and a direct current high current source. An auxiliary valve V5 in the direct current high current source is in series connected with the test valve Vt, so that a bridge arm of a 6 pulse bridge rectifier B6 in the direct current high current source is formed. The high voltage source (1), the high voltage source (2) and the test valve Vt are in parallel connection. The test valve Vt is in ground connection. And heavy currents of the direct current high current source are between 3000A to 5000A. According to the provided composite test apparatus in the invention, two independent high voltage sources are used for providing reverse high voltages and forward high voltages for a test valve during a blockout period, so that unsymmetrical blocking voltages are obtained; therefore, a voltage exerted on the test valve approaches one that is exerted on the test valve in an actual operation condition and thus test equivalence is good. Moreover, according to the apparatus, a control sequence is changed, so that several kinds of voltage combination can be realized; and thus, there are several selection choices on a test scheme with a flexible mode; and the application range of the apparatus is wide.

Description

A kind of composite test apparatus of high-voltage direct current transmission converter valve
Technical field
The present invention relates to a kind of direct-current transmission converter valve test unit, specifically relate to a kind of composite test apparatus of high-voltage direct current transmission converter valve.
Background technology
Along with the increase of power semiconductor device capacity, high voltage dc transmission technology based on high-pressure series semiconductor device art is developed rapidly, worldwide large-scale application, and long distance power transmission and large scale electric network interconnected in played good technical advantage, achieve good economic benefit.DC converter valve is the key equipment of DC transmission system, and along with the raising of direct-current transmission voltage, transmission capacity, the reliable importance of DC converter valve is more outstanding.For improving and ensure the designing quality of DC converter valve, ensure DC converter valve safety, true(-)running under various stable state, transient state service condition, testing converter valve is a kind of required means.Because modern direct-current transmission converter valve has, operating voltage is high, electric current is large, feature capacious, the full live road being difficult to build same actual operating mode identical in experimental enviroment is tested, thering is provided of capacity of experiment is provided, generally adopts the method for synthetic test to carry out the running test of DC converter valve at present.Compound experiment adopts two cover power-supply systems to act on converter valve test product, is respectively D.C. high-current source and high voltage source.D.C. high-current source provides running current, high voltage source provides high-voltage strength, the voltage that the electric current exported in D.C. high-current source during test and high voltage source export alternately puts in tested converter valve according to power frequency, the electric current born in actual motion with equivalent test product, voltage, thermal stress.Although this adds the complicacy of control circui to a certain extent, can greatly reduce experiment power supply capacity, reduce investment outlay.But, existing a few its high voltage source of cover compounding testing circuit forms by oscillation circuit in the world, its distinguishing feature is provided high voltage is Symmetrical, and forward and reverse voltage that converter valve is born in actual motion is not Symmetrical, though test can meet common engineering requirement, but its equivalence is desirable not to the utmost.
Summary of the invention
The object of the present invention is to provide a kind of composite test apparatus of high-voltage direct current transmission converter valve, this device test product valve pressure in test and institute's pressure that bears in actual operating mode are close to consistent.
For achieving the above object, the present invention adopts following proposal:
A kind of composite test apparatus of high-voltage direct current transmission converter valve, its improvements are: described device comprises test product valve Vt, the first high voltage source 1, second high voltage source 2 and D.C. high-current source; Auxiliary valve V5 series connection test product valve Vt in described D.C. high-current source forms the brachium pontis of 6 fluctuation bridge rectifier B6 in D.C. high-current source; Described first high voltage source 1, second high voltage source 2 and test product valve Vt parallel connection; Described test product valve Vt ground connection; The big current in described D.C. high-current source is between 3000A-5000A.
The preferred technical scheme of one provided by the invention is: described first high voltage source 1 comprises DC current source T1, auxiliary valve VS1, V1 and V2, electric capacity C1 and C2, inductance L 1, L2 and L3; Described DC current source T1 positive pole connects the anode of auxiliary valve VS1; Described auxiliary valve VS1, inductance L 1, auxiliary valve V1, inductance L 2, inductance L 3 and auxiliary valve V2 connect successively; The negative electrode of auxiliary valve VS1 is connected with one end of inductance L 1, the other end of inductance L 1 is connected with the anode of auxiliary valve V1, the negative electrode of described auxiliary valve V1 is connected with one end of inductance L 2, the other end of inductance L 2 is connected with one end of inductance L 3, the other end of inductance L 3 is connected with one end of auxiliary valve V2, and the other end of described auxiliary valve V2 is connected with the anode of test product valve Vt; One end of described electric capacity C1 is connected with the common port of auxiliary valve VS1 and inductance L 1, and the other end of electric capacity C1 is connected with the negative pole of DC current source T1; One end of described electric capacity C2 is connected with the common port of inductance L 2 and inductance L 3, and the other end of electric capacity C2 is connected with the negative pole of DC current source T1; Described second high voltage source 2 comprises DC current source T2, auxiliary valve VS2, V3 and V4, electric capacity C3 and C4, inductance L 4, L5 and L6; Described DC current source T2 positive pole connects the anode of auxiliary valve VS2; The negative electrode of auxiliary valve VS2 is connected with one end of inductance L 4, the other end of inductance L 4 is connected with the anode of auxiliary valve V3, the negative electrode of described auxiliary valve V3 is connected with one end of inductance L 5, the other end of inductance L 5 is connected with one end of inductance L 6, the other end of inductance L 6 is connected with one end of auxiliary valve V4, and the other end of described auxiliary valve V4 is connected with the anode of test product valve Vt; One end of described electric capacity C3 is connected with the common port of auxiliary valve VS2 and inductance L 4, and the other end of electric capacity C3 is connected with the negative pole of DC current source T2; One end of described electric capacity C4 is connected with the common port of inductance L 5 and inductance L 6, and the other end of electric capacity C4 is connected with the negative pole of DC current source T2; Described first high voltage source 1 and the second high voltage source 2 ground connection.
The preferred technical scheme of the second provided by the invention is: described auxiliary valve V2 and auxiliary valve V4 is by antiparallel forward auxiliary valve and reverse auxiliary valve composition.
The third preferred technical scheme provided by the invention is: described D.C. high-current source comprises strong current transformer T, 6 fluctuation bridge rectifier B6, auxiliary valve V5, inductance L, current limiting reactor, disconnector one, disconnector two, isolating switch and 10KV bus; Described strong current transformer T, current limiting reactor, disconnector one, isolating switch, disconnector two and 10KV bus are connected successively; Described strong current transformer T is connected with auxiliary valve V5 by 6 fluctuation bridge rectifier B6; Described 6 fluctuation bridge rectifier B6 export to inductance L; Described inductance L and 6 fluctuation bridge rectifier B6 ground connection.
Compared with prior art, beneficial effect of the present invention is:
1, high voltage direct current converter valve synthetic test equipment provided by the invention, by two independently high voltage source be divided into for test product valve blocking-up is provided during forward and reverse high pressure, to obtain asymmetric blocking voltage, the voltage that test product valve is born is closer to actual operating mode, and test effect is better.
2, high voltage direct current converter valve synthetic test equipment provided by the invention, by changing Control timing sequence, realizing multiple voltage combination, selecting array mode flexibly according to different tests project and test product design feature, testing program choice is comparatively large, mode is flexible, applied widely.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of high voltage direct current converter valve synthetic test equipment;
Fig. 2 is voltage, the current waveform of test product valve under Dual Implantations pattern;
Fig. 3 is voltage, the current waveform of test product valve under three injection way;
Wherein: Vt-test product valve, VS1, VS2, V1, V2, V3, V4 and V5-auxiliary valve, L1, L2, L3, L4, L5, L6-inductance, C1, C2, C3 and C4-electric capacity, B6-6 fluctuation bridge rectifier.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The circuit diagram of Fig. 1 composite test apparatus of high-voltage direct current transmission converter valve, this device comprises test product valve Vt, the first high voltage source 1, second high voltage source 2 and D.C. high-current source; Auxiliary valve V5 series connection test product valve Vt in D.C. high-current source forms the brachium pontis of 6 fluctuation bridge rectifier B6 in D.C. high-current source; First high voltage source 1, second high voltage source 2 and test product valve Vt parallel connection; Test product valve Vt ground connection.
First high voltage source 1 comprises DC current source T1, auxiliary valve VS1, V1 and V2, electric capacity C1 and C2, inductance L 1, L2 and L3; DC current source T1 positive pole connects the anode of auxiliary valve VS1; The negative electrode of auxiliary valve VS1 is connected with one end of inductance L 1, the other end of inductance L 1 is connected with the anode of auxiliary valve V1, the negative electrode of described auxiliary valve V1 is connected with one end of inductance L 2, the other end of inductance L 2 is connected with one end of inductance L 3, the other end of inductance L 3 is connected with one end of auxiliary valve V2, and the other end of described auxiliary valve V2 is connected with the anode of test product valve Vt; One end of described electric capacity C1 is connected with the common port of auxiliary valve VS1 and inductance L 1, and the other end of electric capacity C1 is connected with the negative pole of DC current source T1; One end of described electric capacity C2 is connected with the common port of inductance L 2 and inductance L 3, and the other end of electric capacity C2 is connected with the negative pole of DC current source T1; High voltage source 2 comprises DC current source T2, auxiliary valve VS2, V3 and V4, electric capacity C3 and C4, inductance L 4, L5 and L6; DC current source T2 positive pole connects the anode of auxiliary valve VS2; The negative electrode of auxiliary valve VS2 is connected with one end of inductance L 4, the other end of inductance L 4 is connected with the anode of auxiliary valve V3, the negative electrode of described auxiliary valve V3 is connected with one end of inductance L 5, the other end of inductance L 5 is connected with one end of inductance L 6, the other end of inductance L 6 is connected with one end of auxiliary valve V4, and the other end of described auxiliary valve V4 is connected with the anode of test product valve Vt; One end of described electric capacity C3 is connected with the common port of auxiliary valve VS2 and inductance L 4, and the other end of electric capacity C3 is connected with the negative pole of DC current source T2; One end of described electric capacity C4 is connected with the common port of inductance L 5 and inductance L 6, and the other end of electric capacity C4 is connected with the negative pole of DC current source T2; First high voltage source 1 and the second high voltage source 2 ground connection; Auxiliary valve V2 and auxiliary valve V4 is by antiparallel forward auxiliary valve and reverse auxiliary valve composition.
D.C. high-current source comprises strong current transformer T, 6 fluctuation bridge rectifier B6, auxiliary valve V5, inductance L, current limiting reactor, disconnector one, disconnector two, isolating switch and 10KV bus; Strong current transformer T, current limiting reactor, disconnector one, isolating switch, disconnector two and 10KV bus are connected successively; Strong current transformer T is connected with auxiliary valve V5 by 6 fluctuation bridge rectifier B6; 6 fluctuation bridge rectifier B6 export to inductance L; Inductance L and 6 fluctuation bridge rectifier B6 ground connection; The big current in D.C. high-current source, between 3000A-5000A, depends on the rated current of test product valve Vt.
In test, DC current source T1, by the Trigger Logic time cooperation of auxiliary valve VS1, V1 and V2, under the vibration of the different oscillation circuits of C1, C2, L1, L2 and L3 composition coordinates, produces high voltage; In high voltage source 2, T2 is by the Trigger Logic time cooperation of auxiliary valve VS2, V3 and V4, under the vibration of the different oscillation circuits of C3, C4, L4, L5 and L6 composition coordinates, produces high voltage; Two high voltage sources for test product valve Vt blocking-up is provided during forward and reverse high pressure.
6 fluctuation bridge rectifier B6 and the auxiliary valve V5 of access 10kV system coordinate the DC current providing test product valve Vt conduction period.Whole hookup passes through the cooperation of a D.C. high-current source and two high voltage sources, can meet the testing requirements of direct-current transmission converter valve.
High voltage source 1 and 2 for test product valve Vt blocking-up is provided during forward and reverse high pressure, there is provided positive and negative asymmetric high voltage by separate two power supplys to test product valve, make test product valve in test suffered voltage stress with in actual operating mode the voltage stress that bears close to consistent.The periodic waveform of test product valve voltage under two kinds of basic working modes of circuit of the present invention, electric current is further illustrated below by embodiment.
Embodiment 1
In high voltage direct current transmission converter valve synthetic test, basic functional principle of the present invention under Dual Implantations mode of operation:
Fig. 2 is voltage, current cycle (20ms) waveform of test product valve under synthetic test method Dual Implantations pattern.
T0 moment test product valve Vt bears the forward high pressure that the first high voltage source 1 circuit produces;
The t1 moment opens test product valve Vt and auxiliary valve V2, and the resonance current in the first high voltage source 1 flows through test product valve Vt;
The t2 moment introduces the DC current in D.C. high-current source, and test product valve Vt bears the DC current of conduction period;
T3 moment DC current opens auxiliary valve V4 before extinguishing, and in the second high voltage source 2, resonance current flows through test product valve Vt;
In t4 moment second high voltage source 2, resonance current extinguishes, and triggers auxiliary valve V4 and makes test product valve Vt turn off the high back voltage of consequence by the second high voltage source 2;
It is that the second high voltage source 2 charges that the t5 moment controls charge circuit T2, VS2, C3;
It is that the first high voltage source 1 charges that the t6 moment controls charge circuit T1, VS1, C1, triggers auxiliary valve V2 with broad pulse, and at the end of making charging, test product valve Vt bears the forward high pressure of the first high voltage source 1, and hookup is prepare the next test period.
Embodiment 2
In high voltage direct current transmission converter valve synthetic test, the basic functional principle of circuit of the present invention under three injection mode of operations:
Fig. 3 is voltage, current cycle (20ms) waveform of test product valve under synthetic test method three injection way.
T0 moment test product valve Vt bears the forward high pressure of the first high voltage source 1;
The t1 moment opens test product valve Vt and auxiliary valve V2, and the resonance current in the first high voltage source 1 flows through test product valve Vt;
The t2 moment introduces the DC current in D.C. high-current source, and test product valve Vt bears the DC current of conduction period;
It is that the first high voltage source 1 charges that the t3 moment controls charge circuit T1, VS1, C1, makes its voltage resume to t0 moment voltage levvl;
T4 moment DC current opens auxiliary valve V4 before extinguishing, and in the second high voltage source 2, resonance current flows through test product valve Vt;
In t5 moment second high voltage source 2, resonance current extinguishes, and triggers auxiliary valve V4 and makes test product valve Vt turn off the high back voltage of consequence by high voltage source 2;
It is that the second high voltage source 2 charges that the t6 moment controls charge circuit T2, VS2, C2, imposes wide trigger pulse to auxiliary valve V4 simultaneously;
It is that the second high voltage source 2 charges complete that the t7 moment controls charge circuit T2, VS2, C2, and test product valve Vt bears its forward high pressure;
The t8 moment opens test product valve Vt and auxiliary valve V4, and the resonance current in the second high voltage source 2 flows through test product valve again;
T9 moment resonance current zero passage, open auxiliary valve V2, test product valve Vt will bear reverse voltage;
In the t10 moment, controlling charge circuit T1, VS1, C1 is that the first high voltage source 1 charges, and charging terminates rear hookup and enters the next work period.
Finally should be noted that: illustrate that technical scheme of the present invention is not intended to limit in conjunction with above-described embodiment.Those of ordinary skill in the field are to be understood that: those skilled in the art can modify to the specific embodiment of the present invention or equivalent replacement, but these amendments or change are all being applied among the claims awaited the reply.

Claims (3)

1. a composite test apparatus of high-voltage direct current transmission converter valve, is characterized in that: described device comprises test product valve Vt, the first high voltage source (1), the second high voltage source (2) and D.C. high-current source; Auxiliary valve V5 series connection test product valve Vt in described D.C. high-current source forms the brachium pontis of 6 fluctuation bridge rectifier B6 in D.C. high-current source; Described first high voltage source (1), the second high voltage source (2) and test product valve Vt are in parallel; Described test product valve Vt ground connection; The big current in described D.C. high-current source is between 3000A-5000A;
Described first high voltage source (1) comprises DC current source T1, auxiliary valve VS1, V1 and V2, electric capacity C1 and C2, inductance L 1, L2 and L3; Described DC current source T1 positive pole connects the anode of auxiliary valve VS1; The negative electrode of auxiliary valve VS1 is connected with one end of inductance L 1, the other end of inductance L 1 is connected with the anode of auxiliary valve V1, the negative electrode of described auxiliary valve V1 is connected with one end of inductance L 2, the other end of inductance L 2 is connected with one end of inductance L 3, the other end of inductance L 3 is connected with one end of auxiliary valve V2, and the other end of described auxiliary valve V2 is connected with the anode of test product valve Vt; One end of described electric capacity C1 is connected with the common port of auxiliary valve VS1 and inductance L 1, and the other end of electric capacity C1 is connected with the negative pole of DC current source T1; One end of described electric capacity C2 is connected with the common port of inductance L 2 and inductance L 3, and the other end of electric capacity C2 is connected with the negative pole of DC current source T1; Described second high voltage source (2) comprises DC current source T2, auxiliary valve VS2, V3 and V4, electric capacity C3 and C4, inductance L 4, L5 and L6; Described DC current source T2 positive pole connects the anode of auxiliary valve VS2; The negative electrode of auxiliary valve VS2 is connected with one end of inductance L 4, the other end of inductance L 4 is connected with the anode of auxiliary valve V3, the negative electrode of described auxiliary valve V3 is connected with one end of inductance L 5, the other end of inductance L 5 is connected with one end of inductance L 6, the other end of inductance L 6 is connected with one end of auxiliary valve V4, and the other end of described auxiliary valve V4 is connected with the anode of test product valve Vt; One end of described electric capacity C3 is connected with the common port of auxiliary valve VS2 and inductance L 4, and the other end of electric capacity C3 is connected with the negative pole of DC current source T2; One end of described electric capacity C4 is connected with the common port of inductance L 5 and inductance L 6, and the other end of electric capacity C4 is connected with the negative pole of DC current source T2; Described first high voltage source (1) and the second high voltage source (2) ground connection.
2. a kind of composite test apparatus of high-voltage direct current transmission converter valve as claimed in claim 1, is characterized in that: described auxiliary valve V2 and auxiliary valve V4 is by antiparallel forward auxiliary valve and reverse auxiliary valve composition.
3. a kind of composite test apparatus of high-voltage direct current transmission converter valve as claimed in claim 1, is characterized in that: described D.C. high-current source comprises strong current transformer T, 6 fluctuation bridge rectifier B6, auxiliary valve V5, inductance L, current limiting reactor, disconnector one, disconnector two, isolating switch and 10KV bus; Described strong current transformer T, current limiting reactor, disconnector one, isolating switch, disconnector two and 10KV bus are connected successively; Described strong current transformer T is connected with auxiliary valve V5 by 6 fluctuation bridge rectifier B6; Described 6 fluctuation bridge rectifier B6 export to inductance L; Described inductance L and 6 fluctuation bridge rectifier B6 ground connection.
CN201010576649.XA 2010-12-01 2010-12-01 Composite test apparatus of high-voltage direct current transmission converter valve Active CN102486498B (en)

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