Local discharge detection equipment and method of switch cabinet

A partial discharge detection and partial discharge detection technology, which is applied in the direction of measuring electricity, measuring devices, and testing circuits, and can solve the problems of low sensitivity and weak anti-interference ability.

Inactive Publication Date: 2018-08-21
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a switchgear partial discharge detection equipment and method to solve the technical

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  • Local discharge detection equipment and method of switch cabinet
  • Local discharge detection equipment and method of switch cabinet
  • Local discharge detection equipment and method of switch cabinet

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Embodiment Construction

[0036] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0037] see figure 1 , a schematic diagram of the basic structure of the switchgear partial discharge detection device provided by the embodiment of the present invention. Depend on figure 1 As shown, the detection equipment includes: ceramic capacitor core insulator 1, partial discharge signal extraction device 2, charging indicator device ...

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Abstract

The invention discloses a local discharge detection equipment and method of a switch cabinet. The detection equipment comprises a ceramic capacitor core insulator, a local discharge signal extractiondevice, a charge indicating device and a local discharge detection device. The charge indicating device comprises a charge indicating circuit. The local discharge signal extraction device is connectedwith the charge indicating device in parallel, the local discharge signal extraction device comprises an energy supply capacitor and a signal extraction resistor which are sequentially connected in series, and a local discharge detection point is arranged between the energy supply capacitor and the signal extraction resistor. A coupling capacitor is arranged in the ceramic capacitor core insulator, and the ceramic capacitor core insulator is connected to a grounding wire of the charge indicating device in series. One end of the local discharge detection device is electrically connected with the local discharge detection point, and the other end of the local discharge detection device is grounded. When local discharge signals are measured, measurement is convenient, detection signals are strong, and the anti-interference capacity is high.

Description

technical field [0001] The present application relates to the technical field of partial discharge live detection, and in particular to a partial discharge detection device and method for a switchgear. Background technique [0002] Switchgear is a kind of electrical equipment, whose main function is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. During the operation of the switchgear, partial discharge will occur after the internal insulating medium ages, which can also be called partial discharge. Under the action of partial discharge, the insulation characteristics of the insulating medium will gradually deteriorate, leading to electrical accidents, which seriously threaten the safe operation of the power system, as well as the quality and reliability of power supply. According to statistics, partial discharge is the main reason for the deterioration o...

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Application Information

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IPC IPC(8): G01R31/14G01R31/12
CPCG01R31/1254G01R31/14
Inventor 刘红文王科
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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