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High voltage circuit breaker movement characteristic test method

A high-voltage circuit breaker and action characteristic technology, which is applied in the field of high-voltage circuit breaker action characteristic testing, can solve problems such as increasing safety hazards and increasing labor intensity of maintenance staff, and achieves improved operation stability, considerable social and economic benefits, and in-depth The effect of research value and promotion application value

Active Publication Date: 2014-10-15
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the common circuit breaker dynamic characteristic analyzer on the market detects high-voltage circuit breakers, one end of the high-voltage circuit breaker must be suspended. This detection method not only increases the labor intensity of the maintenance staff, but also increases safety hazards.

Method used

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Embodiment Construction

[0023] The invention relates to a test method for the action characteristics of a high-voltage circuit breaker, which uses an electromagnetic induction model to test the closing and opening action characteristics of the high-voltage circuit breaker under the condition that both ends of the high-voltage circuit breaker are simultaneously grounded.

[0024] The electromagnetic induction model is that the cable 5 connected to the circuit breaker 2 and the two ground knives connected to the cable 5 and the ground net 3 connected to the two ground knives together form a closed model, and the combined circuit is equivalent to electromagnetic induction Toroidal core 1 in the model. The circuit breaker 2 is connected with the iron core 1 , and the input signal 9 and the output signal 10 are connected with the iron core through the induction coil 11 .

[0025] Specifically, two current transformers are respectively installed on the two ground blades, and a current transformer input cur...

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Abstract

The invention belongs to the technical field of circuit breaker state monitoring, and especially relates to a high voltage circuit breaker movement characteristic test method. According to the invention, when both ends of a high voltage circuit breaker are grounded, an electromagnetic induction model is used to test closing and opening movement characteristics of the circuit breaker; the electromagnetic induction model is a closed model which is formed by a cable which is connected with the circuit breaker, two ground knives which is connected with the cable, and a ground net which is connected with two ground knives, and combining is carried out to equivalently form an annular iron core in the electromagnetic induction model; the circuit breaker is connected with the iron core; and input and output signals are connected with the iron core through an induction coil. According to the invention, the electromagnetic induction method is used to complete closing and opening time measurement of a fracture of a high voltage switch, which is convenient for the movement characteristic test of a vacuum switch, an SF6 switch and all kinds of high voltage switches; the operation stability, the reliability and the detection efficiency of the high voltage circuit breaker are improved; the maintenance cost is reduced; and the high voltage circuit breaker movement characteristic test method has good social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of circuit breaker state monitoring, in particular to a method for testing the operating characteristics of a high-voltage circuit breaker. Background technique [0002] High-voltage circuit breakers are the most critical electrical equipment in switching appliances. As insulation and arc-extinguishing devices, they are indispensable equipment in power distribution devices in power plants and substations. The high-voltage circuit breaker shoulders the dual tasks of control and protection in the power system, and its status directly affects the safe operation of the power system. [0003] In addition to directly affecting the normal opening and closing function and safe operation of the switch, the opening and closing time and phase-to-phase synchronization performance of the high-voltage switchgear are also related to the safe switching of other equipment in the system and the level of internal overvoltage. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
Inventor 郝建成李斌崔文军洪鹤陈瑞国于在明
Owner STATE GRID CORP OF CHINA
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