A high-voltage switchgear with defect monitoring and comprehensive control functions

Abstract

A high-voltage switchgear having defect monitoring and comprehensive control functions; the high-voltage switchgear comprises various compartments, as well as a comprehensive measurement and control device (11) that is mounted in a secondary chamber (10); in a cable chamber (9) of the switchgear, a first metal shielding case (131) used for mounting a sensor (14) is provided on a partition (91) between the cable chamber (9) thereof and a bus bar chamber (7); a first preset portion of the first metal shielding case (131) is located at a position having a height J 10-40 cm from a bottom wire outlet of a breaker (81) and facing the center line of a B-phase wire outlet of the breaker (81) at 0-15 cm, and at least a portion of the first preset portion is hollow; the present switchgear integrates insulation defect detection points with thermal defect detection, thereby further changing the switchgear into a smart power supply device capable of self-monitoring, self-protection, and self-control.

Description

technical field [0001] The invention relates to the field of power supply and distribution equipment, in particular to a high-voltage switchgear with defect monitoring and comprehensive control functions. Background technique [0002] High-voltage switchgear is commonly used equipment in power supply systems. Its structure usually includes: busbar room, circuit breaker room, cable room, secondary room and its internal components. When the switchgear is manufactured, the problem of how to monitor it is not considered, so the switchgear itself does not have a monitoring function and a corresponding structure. Due to manufacturing quality and equipment aging, various defects and failures will appear inside the switchgear during operation, such as overheating, insulation aging, discharge, flashover, mechanical jamming, action failure and other defects. These defects often end up developing into serious switchgear accidents. Among the various defects of the switchgear, the over...

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Problems solved by technology

Although this solution solves the safety problem of the monitoring system, the problem of incomplete monitoring parts, and the system is too complicated, the inventor further researched and found that: in field practice, if the thermal defect of the switchgear is checked according to the solution Inspection and analysis results often have errors, and it is often difficult to judge whether there is a defect and where the defect roughly occurs

In addition, in order to find various defects of the switchgear in time, people have done a lot of research and developed various types of testing equipment, but these equipments were installed later, thus changing the original structure and state of the switchgear. This will bring difficulties to the operation and maintenance of the switchgear in the future, and also increase the unsafe factors

Moreover, all kinds of monitoring equipment are often complex and self-contained systems. It is difficult to install so many different systems in one switchgear.

Although there was a point of view early on that it is hoped that various defect monitoring can be integrated in a unified system, but due to the great differences in the working principles, signal detection parts and detection methods of various defects, especially high-voltage part defect monitoring, it is difficult to Difficult to put together and difficult to implement

Because this problem has not been solved, most of the switch cabinets are still in the state of no monitoring

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