Partial discharge UHF antenna sensor for electrical equipment

Abstract

The invention provides a super high-frequency antenna sensor for local discharging of electrical equipment. The super high-frequency antenna sensor for local discharging of the electrical equipment comprises an antenna radiation layer, a coplanar waveguide feed layer, a dielectric layer, a coaxial joint and a metal mounting part; the antenna radiation layer is paved at the upper surface of the dielectric layer; the coplanar waveguide feed layer comprises a feed line and grounding layers; the grounding layers are symmetrically distributed at two sides of the feed line; the grounding layers are formed by two fully symmetric rectangles; the lower boundary of the rectangular grounding layers is flush with the lower boundary of the dielectric layer; the coaxial joint is welded with the feed line for receiving a signal sent by the feed line; the metal mounting part and the dielectric layer are fixed together; the coaxial joint is fixed at the metal mounting part. The super high-frequency antenna sensor for the local discharging of the electrical equipment has the characteristics of small size, strong antijamming capacity, wide frequency band, large gain, high sensitivity, good orientation and the like and ensures the safe operation of the electrical equipment.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of electrical equipment insulation status, and in particular relates to a partial discharge ultra-high frequency antenna sensor for electrical equipment. Background technique [0002] In recent years, with the continuous improvement of the voltage level of the power system and the continuous expansion of the grid scale, ensuring the insulation safety of electrical equipment has become an important prerequisite for ensuring the safe operation of the system. At present, the power operation department arranges the partial discharge measurement of large electrical equipment in the insulation preventive test. Practice has proved that regular preventive tests and maintenance have played a very good role in reducing and preventing accidents, but there are still many deficiencies. Therefore, the current condition-based maintenance based on online monitoring and fault diagnosis has been develop...

AI Technical Summary

Problems solved by technology

The main disadvantages of the antenna sensor are: ①The peripheral structure of the antenna sensor is designed for installation on the outside of the GIS pot insulator, the structure is relatively complicated, the volume is large, and it is not suitable for installation inside the electrical equipment; ②The antenna sensor is an external sensor , due to the shielding effect of electromagnetic waves and the small gain of the antenna sensor itself, the antenna sensor has low sensitivity and cannot capture the weak partial discharge signal of electrical equipment

Images