Dehumidification and anti-condensation system in high-voltage switch cabinet for distribution stations

Abstract

A dehumidification and anti-condensation system in a high-voltage switch cabinet for distribution stations of the invention includes a switch cabinet (1) installed indoors. A cable trench (2) for wiring the cables in the switch cabinet (1) is arranged in the indoor ground, and an air exhaust wall hole (3) is arranged in the indoor wall. A cable trench fan (4) is arranged between the air exhaust wall hole (3) and the cable trench (2). The air inlet end of the cable trench fan (4) is communicated to the cable trench (2), and the air outlet end of the cable trench fan (4) is communicated to the air exhaust wall hole (3). The system further includes an air inlet wall hole (6) arranged in the indoor wall, and the air inlet wall hole (6) is communicated to the air inlet of a fresh air blower ofa system host (5) so as to lead in outside air. The dehumidification and anti-condensation system in a high-voltage switch cabinet for distribution stations of the invention has a good dehumidification effect, runs stably and is of high reliability.

Description

technical field [0001] The invention relates to a system for dehumidification and dew condensation, in particular to a system for reducing the humidity in the cabinet space of a high-voltage switch and preventing dew condensation, which is applied to a power distribution station. Background technique [0002] At present, the distribution substation is the most basic unit at the bottom of the distribution network. It has a wide distribution range and a large number of them. Among them, the 10kv (20kv) metal-sealed switchgear is the most direct equipment for supplying power to users; its operational reliability is directly It is related to the quality of power supply and the reliability of power supply. The field operation experience shows that the air quality in the switch cabinet of the station is poor (humidity, condensation). Electricity, pollution flashover and other accidents; therefore, it is necessary to reduce the humidity in the switchgear to prevent condensation; ...

AI Technical Summary

Problems solved by technology

[0007] ① After the temperature in the cabinet rises, it is easy to evaporate the water vapor in the cable trench at the bottom of the cabinet, which increases the humidity in the cabinet

[0008] ②It is necessary to manually turn on or turn off the heater, which is not conducive to the requirement of unattended stations

[0009] ③ Long-term heating energy waste is large

[0011] ① Condensation sensors are all passive actions. Sometimes the air humidity is very high, but since no condensation has formed at the condensation sensor, the heater will not start, that is, there is a certain amount of delay.

[0013] ③When the condensation sensor is eroded by chemical substances in dust and water, its sensitivity will be changed, resulting in deviation of the anti-condensation control point, thereby reducing the reliability of anti-condensation

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