SF6 equipment leakage rate monitoring system and method

Abstract

The invention discloses an SF6 equipment leakage rate monitoring system and method. The method specifically comprises the following steps: collecting measurement time, temperature, humidity, air pressure change value and volume information; through the time transformation function, the change rule of the gas along with time in the measurement time is obtained based on measurement of the air pressure change value, the change rule comprises the pressure change rate, the mass change rate and the temperature change rate, and then the pressure change curve of the gas in the future time period is obtained. According to the invention, a real-time monitoring mode can be adopted, real-time uploading of field data to the system and real-time online monitoring of the equipment state can be realized, and basic data support can be provided for subsequent operation and maintenance of SF6 gas insulation equipment.

Description

technical field [0001] The invention relates to the field of SF6 equipment detection, in particular to a system and method for monitoring the leakage rate of SF6 equipment. Background technique [0002] At present, SF6 insulated equipment is widely used in power systems, especially high-voltage circuit breakers. Massive, widespread SF6 leakage failure. [0003] For SF6 leakage faults, due to insufficient technology for finding and locating the leak point, it is often impossible to find the leak point for equipment with a slow leak rate, and can only maintain the operation of the equipment by supplementing air. [0004] At present, there is no on-site measurement and calculation of the SF6 gas leakage rate in the system, and the operation and maintenance personnel cannot accurately judge the time node when the air pressure of the leaking equipment reaches the alarm value. As a result, there are a lot of human and material resources in the work of replenishing the SF6 equipme...

AI Technical Summary

Problems solved by technology

[0002] At present, SF6 insulated equipment is widely used in power systems, especially high-voltage circuit breakers. Massive, widespread SF6 leak failures

[0003] For SF6 leakage faults, due to the lack of technology for finding and locating the leak point, it is often impossible to find the leak point for equipment with a slow leak rate, and can only maintain the operation of the equipment by supplementing air.

[0004] At present, there is no on-site measurement and calculation of the SF6 gas leakage rate in the system, and the operation and maintenance personnel cannot accurately judge the time node when the air pressure of the leaking equipment reaches the alarm value. As a result, there are a lot of human and material resources in the work of replenishing the SF6 equipment. Waste, in order to prevent low SF6 air pressure alarm of the equipment, it is necessary to replenish the gas in advance

The second is that some defects are upgraded. If the equipment leaks for the first time, and at the same time, the alarm function of the SF6 gas density relay of the equipment is lost, there is a possibility that the SF6 air pressure will drop to the point of locking the opening and closing

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