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.
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.