Installation device for optical overvoltage sensor of power transmission line

Abstract

The invention relates to an installation device for an optical overvoltage sensor of a power transmission line, and belongs to the technical field of voltage measurement. The installation device comprises an L-shaped connection plate, voltage equalizing balls, a support pipe and a sensor fixed housing. The vertical arm of the L-shaped connection plate is connected with a power transmission line through a connection wire and is provided with the voltage equalizing balls. The horizontal arm of the L-shaped connection plate is relatively fixed on fittings on an optical fiber insulator. One end of the support pipe is pressed into a flat shape. The middle part, which is relatively fixed on the fittings on the optical fiber insulator, of the support pipe is cylindrical. The sensor fixed housing sleeves the support pipe. An optical field sensor is arranged in the senor fixed housing. An optical fiber in the optical fiber insulator penetrates through a soft pipe and then is connected with an optical overvoltage sensor through a flange fixed on the sensor fixed housing. By use of the installation device, the circuit is not transformed too much, so construction and installation are convenient; and the surface field is smaller than the corona inception field, so effects of electronic coronas on measurement are avoided and a coupling disturbance problem of the space electric field is solved.

Description

technical field [0001] The invention relates to an installation device for an optical overvoltage sensor of a power transmission line, belonging to the technical field of voltage measurement. Background technique [0002] Overvoltage in power system is mainly divided into lightning overvoltage and operating overvoltage. [0003] Lightning is one of the main natural disasters that cause tripping of overhead transmission lines. Since the power equipment in substations is often affected by lightning intrusion transient voltage, the insulation performance of power equipment must be able to withstand the lightning impulse test. The lightning impulse withstand level of electrical equipment is closely related to the applied waveform. The existing standard lightning voltage waveform (1.2 / 50μs) is derived from the induction and summary of 15 cumulative transient voltage monitoring results of a 220kV transmission line in the United States in the 1920s. Today, the complexity of the ...

AI Technical Summary

Problems solved by technology

Today, the complexity of the power system structure, the application of a large number of new power equipment and other factors may lead to a large difference between the actual lightning intrusion waveform that the existing power equipment can withstand and the current standard waveform.

Images