SF6 online monitoring system

Abstract

The invention relates to an SF6 online monitoring system, which comprises a pointer type SF6 gas density relay, a three-way pipe, a remote transmission module, a sensor module, a self-induction fan and a pipeline, wherein the pointer type SF6 gas density relay is connected with a first interface of the three-way pipe, the sensor module is arranged in the three-way pipe, the sensor module is connected with the remote transmission module, the pointer type SF6 gas density relay comprises a pressure gauge, the remote transmission module is installed on the pressure gauge, a second interface and a third interface of a three-way pipe are connected with a pipeline, one end of the pipeline is connected with a transformer switch body, the other end of the pipeline is a verification port, and a self-inductance fan is arranged in the pipeline. The problem that detection errors are generated due to the fact that SF6 gas in the density relay does not circulate is solved, real-time detection of the full-period operation state of the high-voltage equipment is achieved, and reliable operation of the high-voltage equipment is guaranteed.

Description

technical field [0001] The present invention relates to SF 6 The gas density relay technical field, specifically relates to a kind of SF 6 Online monitoring system. Background technique [0002] SF 6 The density relay is an important protection and control element in the power system. If the circuit breaker fails, it will cause great economic losses. To ensure the reliability of the circuit breaker, it is necessary to monitor the indicators of the circuit breaker frequently, especially SF 6 gas, SF 6 The three physical indicators of gas density, humidity and temperature determine the SF 6 The safe operation of gas-insulated combined electrical equipment must meet the requirements of relevant standards, so that SF 6 The circuit breaker has been kept in good working condition for a long time. to SF 6 Accurate on-line monitoring of indicators such as gas density, humidity and temperature is the key to ensuring the power grid SF 6 An important means for the safe operati...

AI Technical Summary

Problems solved by technology

Because of SF 6 The gas density relay, like other pressure gauges, will have a certain deviation in its alarm and blocking values ​​after a period of use

In addition, because the contact action of the density relay is insensitive or invalid, if it is not checked, there will be a safety hazard

SF 6 The calibration of the density relay is more complicated, but its calibration is essential, SF 6 The calibration of circuit breaker density meter or density relay is to use the instrument to automatically convert the SF at 20°C 6 The gas pressure value shows the density value under various temperatures and pressures, and compares it with various pressures simulated by the instrument to observe the contact condition of the electrical contacts, whether it can send a signal or lock the circuit breaker within the specified value of low pressure

while SF 6 SF inside a density relay 6 The value measured without gas circulation for a long time will be different from the SF in the body 6 Gas has a certain error

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