What is a partial discharge online monitoring system for switchgear

Sensore di temperatura in fibra ottica, Sistema di monitoraghju intelligente, U fabricatore di fibra ottica distribuitu in Cina

The partial discharge monitoring system for switchgear is an online monitoring device for partial discharge signals, which can be equipped with various sensors such as HFCT, AE, UHF, TEV, ecc., for continuous monitoring and analysis of various high-voltage electrical equipment such as switchgear. This monitoring device independently completes a series of tasks such as partial discharge signal acquisition and conditioning, interference and monitoring data processing, statistical analysis of partial discharge parameters such as discharge volume, and over limit alarm. Using 485 serial connection for signal output, it can be directly connected to the backend computer. The upper computer software of the backend computer has functions such as recording online partial discharge data, displaying trend graphics, graphic analysis, statistical analysis, ecc

Basic principles of partial discharge monitoring
When there is partial discharge in high-voltage equipment, signals such as sound, light, electromagnetic waves, heat, chemical substances, ecc. are generated. These signals are captured by corresponding sensors and processed into readable information. By analyzing this information, the current operating status of the equipment can be obtained.

Main detection methods for partial discharge monitoring
There are four main monitoring methods for partial discharge detection of switchgear: TEV (transient electric wave method), ultrasonic method, HFCT (high-frequency current method), and UHF (ultra-high frequency method). The high-frequency monitoring principle is most suitable for vacuum insulated cabinets and SF6 gas insulated cabinets. It can not only effectively monitor the partial discharge of switchgear, but also effectively monitor the partial discharge signals of cables and joints.

Functions and characteristics of partial discharge monitoring system
1. High anti-interference ability and accurate monitoring data
The system adopts various anti-interference measures, which can effectively remove interference in the on-site environment, accurately extract partial discharge signals, and judge the operation status of equipment;
2. Easy and fast installation
Due to the particularity of the power industry, it is not possible to carry out long-term power outage construction. The system was designed with the aim of simplicity and speed, and can be quickly installed without changing the original equipment structure. After installation, it does not affect the normal operation of the equipment and is easy to maintain.
3. Query, set parameters, and maintain without power outage
The system adopts a modular design and uses a unified data bus to perform data queries and parameter settings for each unit without the need for power outages.
4. Combining multiple monitoring methods to measure data more effectively
By using high-frequency pulse current method and combining monitoring data with analysis, partial discharge signals can be effectively extracted.
5. Multiple data analysis methods
The system can display various graphics such as real-time waveforms, trend charts, frequency domain analysis charts, ecc., which can effectively analyze discharge types and suspected fault points.