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Insulation state on-line integrated monitoring system for switchgear

An insulation state and comprehensive monitoring technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of weak partial discharge signals and inability to obtain monitoring effects, and achieve the effect of improving operational reliability

Inactive Publication Date: 2016-05-11
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the existence of a large number of complex interference signals in the operating environment of electrical equipment, and the partial discharge signal is very weak, this monitoring equipment cannot obtain ideal monitoring results, and it is necessary to develop a new monitoring system

Method used

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  • Insulation state on-line integrated monitoring system for switchgear
  • Insulation state on-line integrated monitoring system for switchgear
  • Insulation state on-line integrated monitoring system for switchgear

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] The invention organically combines the optical magnetic field sensing technology and the distributed optical fiber grating temperature sensing technology. The magnetic field sensing element and the grating are packaged together to form an optical temperature and magnetic field composite sensor, which realizes simultaneous measurement of temperature and partial discharge signals; dual-parameter joint detection uses the same laser light source and unified wavelength division multiplexing technology; the system adopts star Compared with the series connection method, it improves the stability and avoids the circuitous wiring of the optical fiber inside the switch cabinet.

[0024] In the present invention, the fiber grating and the magneto-optical sensor head are packaged together to form an optical temperature and magnetic field composite sensor, and each optical temper...

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Abstract

The invention relates to an insulation state on-line integrated monitoring system for a switchgear. The insulation state on-line integrated monitoring system comprises a plurality of monitoring units which are connected with an operation management server through the Ethernet, wherein each monitoring unit includes a monitor, a star coupler, a light wave multiplexer and a plurality of optical temperature magnetic field composite sensors; an input optical port of the star coupler is connected with a broadband light source through fiber; each output optical port of the star coupler is connected with one input optical port of the light wave multiplexer through one optical temperature magnetic field composite sensor; and an output optical port of the light wave multiplexer is connected with an input optical port of the monitor through the fiber. By means of combination of the optical magnetic field sensing technology with the distributed fiber grating temperature sensing technology, the insulation state on-line integrated monitoring system for a switchgear realizes measurement of the temperature and the local signal at the same time. The insulation state on-line integrated monitoring system for a switchgear can timely discover the fault of the switchgear, can realize early warning and positioning of the fault, and is conductive to making a repair schedule reasonably and improving the operation reliability of an electric power system.

Description

technical field [0001] The invention relates to a device for on-line monitoring the insulation state of a power switch cabinet, which belongs to the technical field of detection. Background technique [0002] The switchgear is the key equipment in the power system. Defects or deterioration of the internal insulation of the switchgear and poor contact of the conductive connection parts will damage the lines and equipment, and even cause large-scale power outages in severe cases. According to a statistics of 6~10kV switchgear accidents in the power system, the faults caused by insulation and current carrying account for 40.2% of the total, and the accidents caused by the flashover of the insulation part account for 79.0% of the total number of insulation accidents. The accidents caused by poor contact of the isolation plug accounted for 71.1% of the total number of current-carrying accidents. During the incubation period of these accidents, overheating and discharge phenomena...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1218G01R31/1227
Inventor 尚秋峰姚国珍
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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