How To Conduct Insulation Monitoring For Switchgear?

How to conduct insulation monitoring for switchgear?

Due to the important role of switchgear in control and protection in the power system, its safe operation is directly related to the stability and reliability of the power system. The insulation performance of switchgear will gradually decrease with the passage of time and the impact of the environment. In severe cases, it can lead to faults such as arcs and short circuits, posing a great threat to the power system. Therefore, insulation monitoring of switchgear is a very necessary work in the power system. Strengthening the maintenance and repair of switchgear, timely detecting and handling insulation faults, and ensuring the safe and stable operation of the power system.

Electrical monitoring is a commonly used method in insulation monitoring of switchgear, which can be roughly divided into online monitoring and offline monitoring. Online monitoring is real-time monitoring during the operation of the switchgear, which can promptly detect insulation faults in the switchgear and avoid accidents. Offline monitoring is performed when the switchgear is stopped, which requires regular monitoring and cannot reflect changes in insulation performance in real time. Therefore, online monitoring is widely used in switchgear insulation monitoring at present. Only by selecting the appropriate method based on the actual situation can the insulation performance of the switchgear be effectively evaluated.

A partial discharge online monitoring device for switchgear has been designed and developed, which has the characteristics of strong real-time performance, high reliability, good accuracy, easy installation, and easy maintenance. It can achieve real-time monitoring of the insulation status of switchgear, and can timely detect and prevent insulation faults in switchgear. The online monitoring device for partial discharge in switchgear is based on a combination of ground wave (TEV) and ultrasonic wave (AA) sensors. Through sensors installed on the inner wall of the switchgear, real-time partial discharge signals are obtained, and the data is uploaded to the data management transmission unit through the acquisition terminal. The data management transmission unit further uses wireless communication to upload data to the cloud server, achieving remote monitoring of the insulation status of the switchgear.

The online monitoring device for partial discharge in switchgear has multiple communication interfaces, such as RS485, RJ45, and USB, which can be easily connected to various types of acquisition terminals. It has the characteristics of high sensitivity and high precision measurement, which can accurately capture partial discharge signals and upload data in real-time to cloud servers through wireless communication. Cloud servers can store, analyze, and process uploaded data, and evaluate and predict the operating status of switchgear through technical means such as data mining and pattern recognition. When abnormal situations are detected, the system can promptly issue warning messages, notify relevant personnel to handle them, effectively avoiding the occurrence of insulation faults

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