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High-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method

A technology of DC circuit breaker and synthesis test, applied in circuit breaker testing, instrumentation, measuring electricity and other directions, can solve the problems of high cost, difficult test, and failure to break the circuit breaker in the later stage of the platform voltage withstand capability assessment, to reduce the cost. The effect of small energy, reduced difficulty and cost

Active Publication Date: 2017-05-10
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only assess the normal load current flow capacity and fault current breaking capacity of the circuit breaker, and cannot assess the circuit breaker’s ability to withstand platform voltage
[0008] Existing test methods for hybrid high-voltage DC circuit breakers can only assess the breaking current capability of the circuit breaker, but cannot assess the platform voltage tolerance of the circuit breaker in the later stage of breaking, and the test assessment is not comprehensive
However, under actual working conditions, it is costly and difficult to perform a short-circuit fault current breaking test.

Method used

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  • High-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method
  • High-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method
  • High-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method

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Experimental program
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Effect test

Embodiment 1

[0059] Embodiment 1 provides a composite test circuit for a DC circuit breaker with high-voltage and high-current composite injection, and the DC circuit breaker is a hybrid high-voltage DC circuit breaker; figure 1 , the circuit includes a large current test circuit, a hybrid high voltage DC circuit breaker 1 and a high voltage test circuit; the high current test circuit and the high voltage test circuit are connected in parallel with the hybrid high voltage DC circuit breaker 1.

[0060] Both the high-current test circuit and the high-voltage test circuit are connected in parallel with the hybrid high-voltage DC circuit breaker 1 to form a positive common connection point and a negative common connection point, and the negative common connection point is grounded.

[0061] The high-current test circuit includes a first charging power supply 2, a mechanical isolating switch K 1 , low voltage capacitor C 1 , the first inductance L 1 and the first thyristor valve T 1 ;

[0...

Embodiment 2

[0083] Embodiment 2 provides a composite test circuit for a DC circuit breaker with high-voltage and high-current composite injection, and the DC circuit breaker is a hybrid high-voltage DC circuit breaker; figure 1 , the circuit includes a large current test circuit, a hybrid high voltage DC circuit breaker 1 and a high voltage test circuit; the high current test circuit and the high voltage test circuit are connected in parallel with the hybrid high voltage DC circuit breaker 1.

[0084] Both the high-current test circuit and the high-voltage test circuit are connected in parallel with the hybrid high-voltage DC circuit breaker 1 to form a positive common connection point and a negative common connection point, and the negative common connection point is grounded.

[0085] The high-current test circuit includes a first charging power supply 2, a mechanical isolating switch K 1 , low voltage capacitor C 1 , the first inductance L 1 and the first thyristor valve T 1 ;

[0...

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PUM

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Abstract

The invention provides a high-voltage heavy-current compound injection DC circuit breaker synthetic test circuit and method. The DC circuit breaker is a hybrid high-voltage DC circuit breaker. The circuit comprises a heavy-current test circuit, a hybrid high-voltage DC circuit breaker and a high-voltage test circuit. The heavy-current test circuit and the high-voltage test circuit are both connected in parallel with the hybrid high-voltage DC circuit breaker. The DC circuit breaker synthetic test circuit and method not only can check the passing current capacity and breaking current capability of the hybrid high-voltage DC circuit breaker, but also can check the platform voltage withstand energy of the hybrid high-voltage DC circuit breaker. The high-voltage heavy-current compound injection DC circuit breaker synthetic test method reduces test implementation difficulty and cost.

Description

technical field [0001] The invention relates to a direct current circuit breaker technology, in particular to a synthetic test circuit and method for a direct current circuit breaker with high voltage and high current composite injection. Background technique [0002] DC circuit breakers are mainly used to break or close the rated current and short-circuit fault current in the DC system. Compared with the AC transmission system, since the DC system current does not have a natural zero-crossing point, the breaking mechanism of the DC current is essentially different from that of the AC breaking. Hybrid high-voltage DC circuit breakers have taken into account the technical characteristics of low on-state loss of mechanical circuit breakers and high breaking speed of solid-state circuit breakers, and have become a hot spot in the research of DC circuit breakers. [0003] Breaking performance is one of the most important performances of DC circuit breakers. The DC fault short-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3272G01R31/327
Inventor 郑健超汤广福贺之渊魏晓光周万迪杨兵建张升高阳陈龙龙
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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