Fault detection system, partial discharge on-line monitoring device and method

Abstract

The invention discloses a fault detection system, and a partial discharge on-line monitoring device and method. The fault detection system comprises a diagnosis signal output unit, a current limiting protection unit, a short circuit detection unit, a selection unit, an open circuit detection unit and a plurality of partial discharge pulse acquisition units, wherein the diagnosis signal output unit is connected with the current limiting protection unit; the current limiting protection unit is connected in parallel with the short circuit detection unit, the selection unit and the open circuit detection unit; the selection unit is connected in parallel with the plurality of partial discharge pulse acquisition units; and the partial discharge pulse acquisition units can be connected with a discharge sensor through coaxial cables. The provided monitoring system capable of identifying a discharge sensor fault and a connection cable fault, and a partial discharge on-line monitoring device and method capable of self-checking.

Description

technical field [0001] The invention relates to the technical field of intelligent manufacturing, in particular to a fault detection system, a partial discharge on-line monitoring device and a method. Background technique [0002] The insulation system of high-voltage equipment will continue to be affected by electrical, heating, mechanical and environmental pressures during operation. Under the action of these factors, the insulation will gradually deteriorate, and eventually cause insulation failure and equipment shutdown, resulting in huge economic losses . To prevent such accidents, the current common practice is to introduce partial discharge on-line monitoring. Through the partial discharge live on-line monitoring device, real-time data on the operation status of high-voltage equipment can be found, and the risk of failure of electrical equipment can be discovered in time. This vital status information helps optimize equipment maintenance strategies, equipment managem...

AI Technical Summary

Problems solved by technology

In addition, the connecting cables may be corroded by wind and rain for a long time, exposed to the sun, and may be eaten by mice. Although there are protections in the early construction, it is inevitable to prevent accidents

Secondly, the front-end partial discharge sensor is also exposed to a high-voltage environment, and it is also very likely to be faulted due to abnormalities such as overvoltage.

[0004] However, the prior art also lacks a monitoring system that can identify discharge sensor failures and connecting cable failures

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