Method and apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization

Abstract

The invention provides a method and an apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization. The apparatus comprises a main-broadband high-frequency sensor, an auxiliary- broadband high-frequency sensor, a power-frequency voltage sensor and a calculating host of synchronous analysis. The calculating host of synchronous analysis, which comprises a data acquisition module, a data processing module, an interference filtering module, and an input and output module, is used for collecting a partial discharging signal, a background interference signal, and a power frequency voltage signal as well as eliminating an interference and storing data. The main-broadband high-frequency sensor, the auxiliary- broadband high-frequency sensor, and the power-frequency voltage sensor are accessed in parallel to the data acquisition module of the calculating host of synchronous analysis. An advantage of the invention is to utilize hardware; that is, the auxiliary- broadband high-frequency sensor collects alone an interference signal of background noise; and then a difference of the noise signal and the partial discharging signal on a frequency spectrum is utilized, so that an objective of realization of resistance of the background noise interference of the hardware is achieved.

Description

technical field [0001] The invention relates to a method and device for detecting partial discharge of high-voltage electric equipment, belonging to the technical field of high-voltage electric equipment detection, and in particular to a method and device for detecting partial discharge of high-voltage electric equipment using hardware anti-interference. Background technique [0002] With the development of high-voltage and ultra-high-voltage power equipment, it has become an important part of urban power supply and main grid, especially transformers, bushings, power cables and gas insulated switches (GIS (Gas Insulated Switchgear)) that are mainly based on internal insulation. The power grid occupies an increasingly important position. How to realize the state detection of these high-voltage internal insulation power equipment and ensure the safe and reliable operation of the power grid is a hot research topic at home and abroad. Partial discharge is an important manifesta...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for eliminating partial discharge detection interference by using hardware means, so as to solve the problem that the existing technology only uses software to eliminate noise, or only uses the amplitude of signals collected by dual sensors inside and outside the equipment to eliminate noise effectively. Suppress various interference problems existing in the field

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