Optical fiber composite insulator for measuring temperature of high-voltage busbar and preparation method

Abstract

The invention discloses an optical fiber composite insulator for measuring the temperature of a high-voltage busbar and a preparation method. The optical fiber composite insulator comprises an insulator body, and the insulator body is provided with a first assembly face and a second assembly face, wherein the first assembly face is fixedly connected with the high-voltage busbar, and the second assembly face is connected with a shell of switchgear. The optical fiber composite insulator further comprises an optical fiber, a heat-conducting insert and an optical fiber interface insert, the optical fiber is poured in the insulator body, one end of the optical fiber is connected with the optical fiber interface insert, a fiber Bragg grating is formed at the other end of the optical fiber and is embedded into the heat-conducting insert, the heat-conducting insert is flush to or higher than the first assembly face and is used for sensing the temperature of the high-voltage busbar, and the optical fiber interface insert is connected with an optical demodulator. The temperature information of the current high-voltage busbar can be known immediately by the aid of the optical fiber composite insulator, and the optical fiber composite insulator has the advantages of high precision, high anti-interference capability and simplicity in implementation. Additionally, the preparation method is simple and easy in production and processing on a large scale.

Description

technical field [0001] The invention relates to the technical field of on-line detection of high-voltage switchgear busbars, and more specifically relates to an optical fiber composite insulator used for high-voltage measurement of busbar temperature and a preparation method thereof. Background technique [0002] The high-voltage switchgear in power plants and substations is one of the key components to ensure the safe and reliable operation of the power transmission and distribution system. The normal operation of the high-voltage switchgear is related to the stability of the power system. Therefore, it is especially important to ensure the reliable operation of the high-voltage switchgear. According to statistics, a considerable part of the causes of power system accidents are related to thermal problems. [0003] During the long-term operation of the switchgear, the high-voltage switch contacts and busbar lap points in the switchgear usually have excessive contact resista...

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Problems solved by technology

[0007] The first object of the present invention is to provide an optical fiber composite insulator for measuring the temperature of a high-voltage busbar, which can measure the temperature of a high-voltage switchgear busbar in a high-voltage environment without any additional equipment on the high-voltage busbar. In order to solve the existing problems that the air clearance is reduced and the insulation level is reduced due to the installation of the fiber grating temperature sensor on the busbar

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