Audible sound measurement device and method for GIL breakdown positioning

Abstract

The invention discloses an audible sound measurement device and method for GIL breakdown positioning. The device comprises an acoustic sensor and a central processing module; the acoustic sensor is arranged along a GIL pipe gallery; and the central processing module is used for: obtaining a plurality of acoustic signals collected by the acoustic sensor, performing real-time preliminary processingon the obtained acoustic signals, extracting acoustic signal data meeting a trigger condition when the acoustic signals are judges as breakdown acoustic signals, and performing calculation to obtain abreakdown location by using a positioning algorithm on the basis of the extracted acoustic signal data. After the breakdown location is obtained, the breakdown location can be fed back to a GIL equipment control system to realize real-time online monitoring of the GIL breakdown positioning.

Description

technical field [0001] The invention belongs to the technical field of substation inspection equipment, and in particular relates to an audible sound measurement device and method for GIL breakdown location. Background technique [0002] GIL (Gas-insulated Transmission Lines) gas-insulated pipeline busbar is a safe and flexible alternative to overhead lines, which has the advantage of providing the same power transmission while occupying less space, and because of its relatively beautiful appearance, it has minimal The electromagnetic radiation makes them also suitable for use close to buildings or even inside buildings. [0003] And because it has the advantages of large transmission capacity, low loss, less land occupation, flexible layout, high reliability, good safety protection, maintenance-free, long life and small interaction with the environment. In recent years, GIL gas insulated pipeline buses have been widely used in my country's transmission lines, especially in...

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Problems solved by technology

[0004] As a power transmission channel, the safety and stability of GIL's operation is very important for power stations. The main hidden danger in the operation of its equipment is the insulation of the equipment. At present, the industry mainly uses its internal partial discharge, gas pressure, temperature, SF6 gas Leakage, automatic fire alarm, etc. are monitored, and the online monitoring of fault location for GIL internal insulation breakdown and short circuit is still in the development and research stage

[0005] Before the GIL breaks down, partial discharge will appear at the fault site. In some cases, partial discharge can exist for several months or even longer. Each partial discharge will cause a certain degree of damage to the equipment, and this damage will gradually accumulate. When When the accumulated damage is large enough, it will break down the insulating medium and cause a short circuit, which will damage the GIL equipment and cause a breakdown. Partial discharge is a kind of pulse discharge that will generate a series of light, sound, heat, Physical phenomena and chemical changes such as vibration of electrical and mechanical equipment, and physical phenomena such as light and heat of GIL equipment in the pipe gallery are not easy to collect. Currently, the existing online monitoring methods mainly use vibration sensors to capture and use breakdown signals There are two methods of measurement with ultrasonic sensors, both of which require sensors to be placed on the wall of the pipe gallery for contact measurement, which is inevitably affected by the electromagnetic interference of the GIL equipment and the external factors of the pipe gallery. In addition to the durability of the sensor In addition to high requirements for anti-interference ability, it is also susceptible to damage to the sensor due to partial discharge, resulting in unstable measurement results and high device costs.

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