Supporting tool for ultrahigh-frequency sensor and ultrasonic sensor used for discharging electrified detection of gas insulated switchgear (GIS)

Abstract

The invention discloses a supporting tool for an ultrahigh-frequency sensor and an ultrasonic sensor used for discharging electrified detection of a gas insulated switchgear (GIS). The supporting tool comprises an insulating rod, a sensor fixing clamp seat and an accessory fixing clamp seat, wherein a rotating structure is arranged between the insulating rod and the sensor fixing clamp seat. The supporting tool is characterized in that the sensor fixing clamp seat adopts a door-shaped structure; an ultrasonic sensor special base is arranged in the door-shaped structure, is made from insulating materials, and comprises two parts which are eudipleural; and after the two parts are jogged, the upper part surface of the ultrasonic sensor special base is an arc-shaped contact surface, a columnar hole is formed in the middle part of the ultrasonic sensor special base, and hard sponge cushions are arranged at the bottom of the columnar hole. The supporting tool disclosed by the invention is compact and flexible, convenient to carry, convenient to operate and good in insulation, and can be used as a special supporting tool of an ultrasonic wave sensor and an ultrahigh frequency sensor of which the shapes are completely different; the supporting tool is simple in structure, low in cost, convenient and quick to use and labor-saving, and the working efficiency of the electrified detection is improved.

Description

Technical field [0001] The invention relates to the technical field of a partial discharge live detector sensor, and belongs to the technical field of latent fault diagnosis of gas-insulated metal-enclosed switchgear. Background technique [0002] GIS refers to a highly integrated electrical equipment that encloses all equipment in the power system (except transformers) in a grounded metal cylinder according to the main wiring method, and is filled with SF6 gas as insulation and arc extinguishing medium. Compared with air-insulated conventional substation equipment, GIS has many advantages. In terms of safety and reliability, the internal components of the GIS are completely enclosed in the metal cylinder, which reduces the risk of electric shock for personnel and also reduces the impact of the external harsh environment on the conductor in the cylinder. The impact of weather; in terms of installation and maintenance, GIS equipment is small in size and requires less floor space, ...

AI Technical Summary

Problems solved by technology

[0003] Partial discharge (PD) refers to the phenomenon that there are defects inside the insulation of electrical equipment, such as metal spikes, loose connectors, metal particles, mechanical vibration, etc., and local repeated breakdown and extinguishing occur under a certain applied voltage. Although the discharge amount of this type of discharge is not large, short-term existence will not affect the immediate breakdown of the entire insulation, but partial discharge under long-term operating voltage will cause insulation defects to gradually expand, and finally cause the entire insulation breakdown

However, the current GIS equipment is compact in structure and the detection space is small. The height of some measuring points exceeds 3m or even 5m. The industry safety regulations require that at this time, climbers must wear safety belts and hang the safety belt hooks in a firm place. However, almost all GIS The equipment is not designed with safety belt hooks and loops, and the operators who climb high must spend a lot of energy on fixing the safety belt, which increases the danger of high altitude operations. During the actual operation, the test personnel will inevitably touch the GIS equipment with their limbs, burying the person and equipment major safety hazard

[0005] For ordinary GIS substations, there are more than a thousand measuring points for UHF and ultrasonic testing. Generally, 30% to 40% of the measuring points need to use ladders. Wearing seat belts for a long time, climbing, and lifting the sensor will cause damage. It makes the testers feel tired, and it also consumes the staff's energy and physical strength to move the ladder and change the safety belt attachment points

In addition, there are some special cases where it is difficult to reach GIS measuring points even for climbing operations. For example, in some places, neither fork ladders nor straight ladders can be erected.

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