Partial discharge signal detection system

Abstract

The invention relates to a partial discharge signal detection system. The partial discharge signal detection system comprises a detection sensor, a signal oscillography unit and a signal processing terminal, wherein the detection sensor comprises a PCB, a front surface wire and a back surface wire, the front surface wire and the back surface wire on the PCB form a measurement wire turn and are connected through via holes; and the detection sensor is connected with the signal oscillography unit, and the signal oscillography unit is connected with the signal processing terminal. According to thepartial discharge signal detection system, influences caused by interference factors such as adjacent lead magnetic fields are greatly reduced, and the accuracy of the partial discharge detection isincreased; and a loop wire design manner is different from a loop wire design manner of a traditional PCB coil, and the area of a loop formed by a loop wire is relatively close to the area of a loop formed by wire wrapping, so that the compensation effect is relatively good, and the anti-jamming capability is relatively strong.

Description

technical field [0001] The invention provides a partial discharge signal detection system, which is used for real-time detection of the partial discharge state of power equipment, including transformers, circuit breakers, transformers, etc., so as to provide data support for state monitoring. Background technique [0002] Partial discharge detection is of great significance for judging and evaluating the insulation state of power equipment, so accurate detection of partial discharge signals has become one of the important contents of power equipment detection. At present, the commonly used partial discharge detection methods include UHF method, ultrasonic method, hollow coil method and so on. The air-core coil method has the advantages of small size, light weight, low cost, and wide measurement frequency range, and has become one of the main methods for partial discharge detection at present. However, the design of the air-core coil is a key point that affects the results o...

AI Technical Summary

Problems solved by technology

[0004] In view of the current partial discharge detection problems such as low sensor accuracy, susceptibility to interference factors, low measurement frequency band, etc.

The invention provides a partial discharge signal detection system, which includes a detection sensor, a signal oscilloscope unit, a software processing platform and other parts. The detection sensor is designed for the problems such as the susceptibility to interference of the current PCB air-core coil and has a strong anti-interference ability. The air-core coil, the front and back of the PCB board adopts overlapping wiring, so that the extension line of the turn plane and the center of the primary wire are on the same straight line, thereby greatly reducing the influence of interference factors such as the magnetic field of nearby wires and improving partial discharge. Detection accuracy

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