Method for monitoring air particles and air abnormal components in switch cabinet

Abstract

The invention relates to a method for monitoring air particles and air abnormal components in a switch cabinet. The method is characterized in that utilizing an infrared light scattering dust fall monitoring device adopting a particle calculation principle to monitor the concentration of dust particles, judging whether the alarm concentration is reached or not, if the alarm concentration is not reached, continuing to monitor, otherwise, monitoring the concentration of O3 by adopting an ultraviolet spectrum gas absorption principle, monitoring the concentrations of NO, CO and NO2 by adopting anelectrochemical principle, judging whether the alarm concentration is reached or not, if the alarm concentration is not reached, performing ventilation and dust removal, otherwise, sending out a prompt that the suspected partial discharge defect exists. The method is advantaged in that design is reasonable, monitoring of the internal operation environment of the switch cabinet is enhanced by monitoring abnormality of air particles and air components in the switch cabinet, the effective equipment operation condition information is provided for operation maintenance and state overhaul, and insulation flashover and insulation breakdown conditions are avoided.

Description

technical field [0001] The invention belongs to the field of high-voltage electrical appliances, in particular to a method for monitoring air particles and abnormal air components inside a switch cabinet. Background technique [0002] At present, the commonly used system for monitoring the internal operating environment of the switchgear is to control the heater power or ventilation by monitoring the temperature and humidity of the busbar room, circuit breaker room, and cable room of the temperature and humidity controller, so as to adjust the temperature and humidity inside the switchgear. the goal of. However, through the analysis of switchgear defects and failure cases, it was found that dust and carbon accumulation in the switchgear caused insulation flashover, partial discharge defects caused insulation breakdown and other problems occurred frequently, and the problem could not be solved by means of heating or ventilation. Therefore, it is necessary to strengthen the sw...

AI Technical Summary

Problems solved by technology

However, through the analysis of switchgear defects and failure cases, it was found that dust and carbon accumulation in the switchgear caused insulation flashover, partial discharge defects caused insulation breakdown and other problems occurred frequently, and the problem could not be solved by means of heating or ventilation. Therefore, it is necessary to strengthen the switchgear. The monitoring of the operating environment inside the cabinet provides effective equipment operation information for operation maintenance and condition inspection, and avoids insulation flashover and insulation breakdown.

[0003] The causes of switchgear failures include the problem of dust and carbon accumulation in the switchgear and partial discharge problems. The main source of dust and carbon accumulation in the switchgear is dust particles in the air, which mainly enter through the ventilation system, heat dissipation net, and pressure relief channels. In the switchgear; it may also increase with the increase of the operating period, the poor sealing of the switchgear door will reduce the IP protection level, and the dust particles in the air will penetrate into the switchgear

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