Panxter is a professional company engaged in the design and manufacture of electrical equipment.
Overview of the ME-PD20i Partial Discharge Detection and Positioning System
GIS (Gas Insulation Switchgear) is a gas-insulated, fully enclosed combined switchgear, which is very common in power grids and large substations. It assembles all kinds of switchgear in the power system in a closed metal shell, and then fills it with SF6 gas to achieve good insulation from the outside. Due to the high field strength within the GIS, partial discharge occurs during daily operation when there are some defects inside the device. Partial discharge is one of the main causes of insulation deterioration of GIS equipment, and it is also an important feature to describe the aging of GIS insulation. Through the detection and analysis of PD signals, it is possible to determine whether there is some kind of hidden insulation hazard inside the GIS. At present, various PD detection methods have been more and more widely used in GIS equipment. Partial discharge is a kind of pulse discharge, which will produce a series of physical phenomena and chemical changes such as light, sound, electrical and mechanical vibration in and around the power equipment. These physical and chemical changes that accompany partial discharge can provide detection signals for monitoring the internal insulation status of power equipment. According to the different detection principles and methods, the commonly used partial discharge detection methods include UHF method, ultrasonic method and high-frequency current method.
The ME-PD20I partial discharge detection and positioning system can detect live through electrical signals and ultrasonic signals, integrating UHF method, high-frequency current method and ultrasonic method, to determine whether there is a discharge fault in GIS, and complete accurate positioning.
Features of ME-PD20i Partial Discharge Detection and Positioning System
Channel UHF conditioning unit, which can be connected to 4 UHF sensors at the same time for GIS field testing;
Channel HFCT conditioning unit, which can be connected to HFCT and RF coupling sensors at the same time;
3. Provide 4 channels of low-noise ultrasonic preamplifier and ultrasonic sensor with differential type, which can effectively solve the problem of on-site GIS and transformer test interference;
RF coupling sensor test can effectively solve the on-site environment of the intermediate joint of the distribution network cable without grounding, and can effectively detect the partial discharge signal of the high-voltage cable;
5. UHF PD detection signal conditioner provides high-pass, low-pass, band-pass controllable, gain controllable, detection and non-detection output, which is convenient for analyzing signal periodic characteristics and positioning analysis;
6. The high-frequency PD detection signal conditioner provides three kinds of band-pass filtering options, with controllable gain, detection and non-detection output, which effectively solves the problem of on-site interference suppression;
7. The high-speed digital storage oscilloscope can analyze the waveform details and time domain characteristics of ultra-high frequency, high-frequency current, radio frequency coupling and ultrasonic signals, and accurately locate and analyze the local discharge source;
8. Using the combined detection technology of sound and electricity, the local discharge source can be accurately positioned and analyzed, and the positioning accuracy is high;
9. The type of partial discharge can be judged according to the phase characteristics and waveform characteristics of the partial discharge signal;
10. The system is used for partial discharge live testing of substation GIS, transformers, reactors, etc., and can also be used for partial discharge live testing of other equipment in substations such as switchgear and power cables.
Because the product will be upgraded and changed, please refer to the parameters of the official website of Panxter!