Pressure on-line monitoring system for 750kV high-voltage insulating sleeve

Abstract

The invention discloses a pressure on-line monitoring system for a 750kV high-voltage insulating sleeve. The pressure on-line monitoring system comprises an oil drain hole which is formed in the bottom side face of the high-voltage insulating sleeve and communicated with the inside of the high-voltage insulating sleeve, a tee joint is mounted at the oil drain hole, one inlet of the tee joint is connected with the oil drain hole, a pressure transmitter and a down leading sampling pipe are mounted at two outlets of the tee joint, the down leading sampling pipe extends downwards, a sampling valveis mounted at the tail end of the down leading sampling pipe, a switching valve for switching the inlet and the two outlets to be connected is mounted at the tee joint, signals of the pressure transmitter are in communication with a local collector through a communication module, the local collector is in communication with a background computer through a communication device and comprises a controller, a display, an alarm and a wireless communication module, the wireless communication module is in communication with the background computer, and the controller is connected with the display, the alarm and the wireless communication module.

Description

technical field [0001] The invention relates to an online pressure monitoring system of a 750kV high-voltage insulating bushing, which is specifically used for monitoring the pressure of oil inside the 750kV high-voltage insulating bushing. Background technique [0002] The transformer insulating bushing is an important part of the transformer. It leads the high and low voltage leads inside the transformer to the outside of the oil tank. It not only serves as the ground insulation for the leads, but also serves as a fixed lead. Therefore, it must have specified electrical strength and sufficient mechanical strength. At the same time, the transformer insulating bushing is also one of the current-carrying components of the transformer. It must have good thermal stability and be able to withstand the long-term heating generated by the working current during normal operation of the transformer and the instantaneous overheating when passing the short-circuit current. If the tran...

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Problems solved by technology

[0003] In actual operation, there is a burst phenomenon on the 750kV high-voltage insulating bushing. The cause of the burst is analyzed to be the increase in the hydrogen content and acetylene content in the oil; therefore, in order to avoid bursting, the oil in the high-voltage insulating bushing is regularly taken as Oil sample testing, this process is very passive, requires power outages, and requires a lot of working time;

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