Dehumidification control method and system matched with switch cabinet group

Abstract

The invention discloses a dehumidification control method and system matched with a switch cabinet group, and the method comprises the steps: building a peripheral damp-proof environment of a switch cabinet, so as to reduce the generation of moisture from the source of moisture generated by a high-voltage switch cabinet in a switch chamber; constructing a structure for dehumidifying the interior of the switch cabinet, arranging a dehumidifier in a switch chamber where the switch cabinet is located, and constructing a closed convection internal circulation channel between the dehumidifier and the switch cabinet for dehumidifying moisture in the switch cabinet; connecting an intelligent controller to a switch control loop of the dehumidifier, wherein the intelligent controller intelligentlycontrols on-off and dehumidification processes of the dehumidifier according to real-time temperature and humidity data in the switch cabinet. Moisture in the switch cabinet is reduced to the maximumextent by constructing the damp-proof environment on the periphery of the switch cabinet, and intrinsic safety and accurate targeted dehumidification of the operation environment of the switch cabinetare achieved by further combining intelligent control over dehumidification in the switch cabinet.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a dehumidification control method and system for matching switch cabinet groups. Background technique [0002] The natural conditions of substations vary greatly. Some high-voltage power distribution rooms in some substations, especially the 35kV power distribution room, have prominent problems of moisture condensation inside the switchgear. The reasons are roughly as follows. 1) The ambient humidity is too high; 2) Metal-enclosed compact switchgear, especially 35kV power distribution equipment, has a relatively small space inside the cabinet, concentrated electric field strength, and small creepage ratio of insulating parts; 3) Substation management problems: cable trenches The internal water vapor is in series, and the wall of the power distribution room is in disrepair and water seepage occurs. Moisture condensation inside the switchgear is extremely harmful. Its appe...

AI Technical Summary

Problems solved by technology

1) The ambient humidity is too high; 2) Metal-enclosed compact switchgear, especially 35kV power distribution equipment, has a relatively small space inside the cabinet, concentrated electric field strength, and small creepage ratio of insulating parts; 3) Substation management problems: cable trenches Water vapor enters in, and water seepage occurs in the disrepair of the wall of the power distribution room, etc.

[0005]2. Most of the cable trenches are designed with bricks, and the waterproof and moisture-proof measures are not fully considered, and the plugging is only considered to prevent small animals, resulting in different moisture in the cable trenches The degree enters the switchgear body, causing some insulating parts to be damp and discharged;

[0006]3. At present, air conditioners and dehumidifiers are mostly used in switch rooms to drive away moisture. From the perspective of use, some effects have been achieved, but there are obvious deficiencies: First, the switch rooms are damaged by doors and windows. , exhaust fans, etc. are difficult to form a sealed space, and the air drying effect in the switch room is not good; second, the dry air generated by the dehumidifier is difficult to enter the switch cabinet, and at the same time, the humid gas in the cabinet is difficult to be extracted by the dehumidifier; third, the use of dehumidifiers or air conditioners During the process, it is very easy to cause a temperature difference between the inside and outside of the switch cabinet, thereby forming condensation in the switch cabinet and aggravating the dampness of the insulating parts; Fourth, the dehumidifier or air conditioner has no obvious drying effect on the lower part of the switch cabinet, especially the moisture in the cable trench cannot be removed from the source control;

[0007]4. Installing heaters and special dehumidification devices in the switchgear can achieve some effects in the short term, but since each switchgear needs to be installed independently, not only the investment is large , more importantly, it is difficult to maintain, and the heater and temperature and humidity controller are vulnerable products, and the maintenance and replacement must be powered off. Practice has proved that the practicability is not strong, the effect is not obvious, and the transformation cost is high

[0008]5. The dehumidification power consumption of dehumidifiers, air conditioners and cabinet heaters is huge and uneconomical;

[0009]6. The dehumidifier completely relies on its own automatic control system to work, and cannot be linked with the intelligent auxiliary control system of the switch room environment, and the degree of automation is not high

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