Electrified intelligent gas supplement device and gas supplement method of electricity sulfur hexafluoride transformer

Abstract

The invention relates to an electrified intelligent gas supplement device and a gas supplement method of an electricity sulfur hexafluoride transformer. The gas supplement device comprises a high-pressure gas tank in which sulfur hexafluoride gas is stored, a three-way communicating pipe and a gas supplement connecting pipe, wherein a reducing valve is arranged at the outlet of the high-pressure gas tank, the main pipe of the three-way communicating pipe is connected with the reducing valve through a gas supplement electromagnetic valve; one branch pipe of the three-way communicating pipe is provided with a pressure sensor, an electric contact point pressure gauge and a safety valve and connected with the gas supplement connecting pipe through a gas supplement valve; the other end of the gas supplement connecting pipe is connected with a gas charging and discharging valve of the electricity sulfur hexafluoride transformer which is in operation and needs gas supplement; the other branch pipe of the three-way communicating pipe is provided with a bypass valve; the gas supplement electromagnetic valve and the pressure sensor are electrically connected with a control module; the gas supplement electromagnetic valve is further electrically connected with the electric contact point pressure gauge and the electric contact point pressure gauge is electrically connected with an alarm. According to the invention, the defect of a traditional gas supplement device is overcome and safe, reliable, efficient, accurate, economical and environment-friendly electrified gas supplement operation is realized.

Description

technical field [0001] The invention relates to a charged intelligent gas supply device for a power SF6 transformer and a gas supply method thereof. Background technique [0002] In the running power SF6 transformer, when the internal SF6 gas pressure drops to a certain level, serious accidents will occur due to insufficient insulation or insufficient arc extinguishing capacity when the main transformer internal discharge or arc discharge fault occurs, and even cause serious explosions of the main transformer. Therefore, when the SF6 gas pressure inside the power SF6 transformer in operation is insufficient, the gas should be replenished in time. The traditional way of replenishing gas for power SF6 transformers is mostly manual operation of gas filling valves, which cannot provide stable and soothing gas replenishment according to the SF6 gas pressure inside the SF6 transformer. The impact of the airflow in the SF6 power transformer during operation will lead to accidents ...

AI Technical Summary

Problems solved by technology

Due to manual control, sometimes excessive gas filling occurs, and then the excess SF6 gas is directly emptied into the atmosphere, causing waste and environmental pollution (SF6 gas for electricity is expensive to discharge and waste, and evacuation will destroy the ozone layer)

Images