Substation high-voltage chamber fully-closed operation system and control method

Abstract

The invention relates to a substation high-voltage chamber fully-closed operation system and a control method. The system comprises a high-voltage chamber; the high-voltage chamber is a fully-closed structure; an electric blind window electrically controlled to open and close is mounted in a ventilation port of the high-voltage chamber; an environment active operation maintenance system is mountedin the high-voltage chamber, and comprises an environment monitoring device, a data processing module and an environment auxiliary device; the environment monitoring device collects high-voltage chamber internal environment information and sends to the data processing module; and the data processing module adjusts the environment in the high-voltage chamber through controlling the environment auxiliary device. Through intelligent control of the temperature and the humidity, the operation environment is optimized, the electric insulation intensity of switch cabinet equipment is improved, the bus and transformer damage risk caused by failures of the switch cabinet is reduced, the substation safety operation level is improved, and the safety benefit is prominent. The system can be applied tothe high-voltage chamber to eliminate the insulation reduction problem caused by damping and pollution of switch cabinet insulation pieces of small cabinet bodies.

Description

Technical field: [0001] The invention relates to a fully-sealed operation system and a control method for a high-voltage chamber of a substation. Background technique: [0002] In recent years, the 35kV switchgear in the high-voltage room of the substation generally adopts a small cabinet with a width of 1.4 meters, resulting in the minimum air clearance between conductors in the cabinet failing to meet the requirement of 300mm. The high-voltage room usually has multiple vents, and the airtightness is poor. In the case of strong winds and heavy rains, outdoor dust and moisture can easily enter the switch cabinet, resulting in moisture and dirt on the insulation partitions and heat-shrinkable sheaths, resulting in a decrease in insulation strength. The thermal effect of the equipment in the switchgear will cause the aging and decomposition of the insulating medium, resulting in cracking and falling off of the heat shrinkable sheath. Long-term operation in this environment is...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the 35kV switchgear in the high-voltage room of the substation generally adopts a small cabinet with a width of 1.4 meters, resulting in the minimum air clearance between the conductors in the cabinet failing to meet the requirement of 300mm

The high-voltage room usually has multiple ventilation openings, and the airtightness is poor. During strong winds and heavy rains, outdoor dust and moisture can easily enter the switchgear, causing the insulation partitions and heat-shrinkable sheaths to be damp and dirty, resulting in a decrease in insulation strength.

The thermal effect of the equipment in the switchgear will cause the aging and decomposition of the insulating medium, resulting in cracking and falling off of the heat shrinkable sheath

Long-term operation in this environment is likely to cause partial discharge, flashover, insulation breakdown and other failures of high-voltage switchgear equipment, seriously affecting the safe operation of the power grid

[0003] At present, the humidity control in the high-pressure chamber is to reduce it by adding a high-power dehumidifier, but because the environment in the high-pressure chamber is not airtight, the outdoor moisture cannot be isolated, and the effect is not good; the second is to discharge the indoor moisture through an axial flow fan. It cannot be realized when the humidity is high; the third is that the dehumidifier and fan operate independently, and can only be turned on and off by people on site, and it is impossible to realize automatic environment improvement

[0004] The high-pressure chamber with natural ventilation and fan ventilation is a non-airtight environment, causing outdoor pollution to enter the indoor environment and affect the operation of the equipment. At present, there is no effective solution

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