Device for preventing moisture condensation of closed bus

Abstract

The invention discloses a device for preventing moisture condensation of a closed bus. The device comprises a dehumidifying system, a drying system and a control system. The dehumidifying system includes an air source cabinet, a communication pipe, an air suction branch, and a first air inlet branch, wherein one ends of the air suction branch and the first air inlet branch are connected with the air source cabinet, and the other ends are connected with a case of the closed bus; and the communication pipe is used for connecting the three-phase cases of the closed bus. The drying system includes an air compressor, a heater, an air exhaust branch, and a second air inlet branch, wherein the air compressor is connected with the heater; the second air inlet branch is respectively arranged on the three-phase cases of the closed bus; the other end of the second air inlet branch is connected with the heater; and the air exhaust branch is connected with the case of the closed bus. The control system includes a temperature and humidity sensor, and a PLC (programmable logic controller) control system, wherein the temperature and humidity sensor is respectively arranged in the three-phase cases of the closed bus, and is connected with the PLC control system. The device provided by invention has low requirement for the sealing performance of the bus, can be used under all conditions, and is convenient and intuitive in use and low in maintenance cost.

Description

technical field [0001] The invention relates to a device for preventing dew condensation, in particular to a device for preventing dew condensation in a closed bus bar, belonging to the technical field of power transmission and distribution equipment. Background technique [0002] The closed busbar is the power transmission circuit connected between the generator and the transformer. The reliability of its safe operation is directly related to the stability of the entire power system. How to ensure the long-term effective and safe operation of the closed busbar is a crucial issue. The closed busbars are arranged in a special environment, usually passing through indoors and outdoors. Condensation will occur inside the busbar due to the difference in ambient temperature and humidity, which will reduce the overall insulation performance of the busbar and easily cause major safety hazards such as discharge, flashover and even breakdown. [0003] In order to solve the dew condens...

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Problems solved by technology

However, these three measures have certain defects. The micro positive pressure device prevents external gas, dust, etc. from entering the bus by filling dry air into the bus. The moisture retained inside the busbar during the process, and with the prolongation of the busbar operation time, the seals will age, so it is impossible to ensure an effective internal positive pressure for a long time, resulting in the failure of the anti-condensation device; the hot air maintenance device can only be used in The operation of the bus stop phase, so the internal dryness cannot be ensured during the bus operation phase, and its power consumption is very large; the air drying circulation device achieves the effect of preventing condensation by circulating and drying the gas inside the bus, but the device operates during the bus operation phase. It will cause the internal temperature of the busbar to rise, which will affect the service life of the internal insulating parts and seals of the busbar.

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