GIS single-circuit breaker power failure time characteristic measuring method

A measurement method and technology of power outage time, which is applied in the direction of circuit breaker testing, etc., can solve the problems of unavailable time parameters and measurement of circuit breakers, and achieve the effect of ensuring timely maintenance and testing, ensuring safe and stable operation, and optimizing the operation mode of equipment

Active Publication Date: 2019-06-18
CHINA YANGTZE POWER
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Problems solved by technology

[0008] In order to solve the above-mentioned technical problems, the present invention provides a method for measuring the power failure time characteristics of a GIS single circuit breaker, which can effectively solve the problem that the time parameter measurement of the circuit breaker cannot be performed when the GIS single circuit breaker is powered off

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  • GIS single-circuit breaker power failure time characteristic measuring method
  • GIS single-circuit breaker power failure time characteristic measuring method
  • GIS single-circuit breaker power failure time characteristic measuring method

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Embodiment Construction

[0029] Principle analysis:

[0030] From figure 2 It can be seen that after a single circuit breaker in GIS fails, figure 2 Both the first high voltage conductor 1 and the second high voltage conductor 5 carry high voltage. To prevent the high voltage of adjacent live circuit breakers from being coupled to the grounding switch through the fracture of the isolation switch: the tail ends of the first grounding switch 6 and the second grounding switch 9 will cause harm to personnel and test equipment, the best The method is not to open the ground connection piece 7 of the first grounding knife switch and the grounding piece 8 of the second grounding knife switch, so that the grounding end is always reliably grounded; but if the grounding piece of the grounding knife switch is not opened, the test line cannot be connected, and the circuit is broken. The time parameter measurement of the instrument cannot be carried out.

[0031] When the circuit breaker time characteristic te...

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Abstract

The invention relates to a GIS single-circuit breaker power failure time characteristic measuring method. The method includes the following steps that: three adjustable resistors R are connected in parallel with the grounding connection sheets of grounding disconnecting links at the same sides of the phase A, phase B and phase C of a circuit breaker through wires, and at the same time, other testwires are connected; the resistance of the three adjustable resistors is adjusted to be 200 ohm, the grounding connection sheets of the grounding disconnecting links at the phase A, phase B and phaseC of the circuit breaker, which are connected in parallel with the adjustable resistors R, are disconnected, and a multimeter is adopted to detect the voltages to earth at the tail ends of the grounding disconnecting links, namely, the voltages cross two ends of each of the resistors R, it is ensured that no high voltages appear here, and personal safety is ensured; and a test is performed according to a normal circuit breaker time parameter measurement method. With the GIS single-circuit breaker power failure time characteristic measuring method of the invention adopted, the problem of failure to measure the time parameters of a single circuit breaker of a GIS during the power failure of the single circuit breaker of the GIS can be solved.

Description

technical field [0001] The invention relates to the field of preventive tests of electrical primary equipment, in particular to a method for measuring the power failure time characteristics of a GIS single circuit breaker. Background technique [0002] GIS is a gas-insulated metal-enclosed combined switchgear, which belongs to the field of high-voltage power transmission equipment. GIS uses SF6 gas as the insulating medium. It has the advantages of compact structure, small footprint, high reliability, unaffected by external environmental conditions, and small maintenance workload. It is widely used in power systems. According to DL / T596-1996 electrical equipment preventive test regulations, GIS circuit breakers need to do an electrical preventive test after 1-3 years of operation. After the circuit breaker is overhauled and the circuit breaker operating mechanism is replaced, the circuit breaker time parameter must be measured. [0003] Defects and deficiencies of the prior...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 杨树锋王义平何雪芳王军桥单文建
Owner CHINA YANGTZE POWER
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