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

A high-voltage power equipment, partial discharge detection technology, applied in the direction of testing dielectric strength, etc., can solve problems such as inability to effectively suppress various interference, and achieve the effect of fast noise filtering

Active Publication Date: 2014-08-20
STATE GRID ELECTRIC POWER RES INST
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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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  • Method and apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization
  • Method and apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization

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Embodiment Construction

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like figure 1 As shown, the method for detecting the partial discharge of high-voltage power equipment of the present invention is as follows: two broadband high-frequency sensors are synchronously set on the high-voltage power equipment under test, and one main broadband high-frequency sensor is sleeved on the ground wire of the high-voltage power equipment. Or the grounding equipment is used to couple the partial discharge signal containing background noise on the high-voltage power equipment, and another secondary broadband high-frequency sensor is located in the same location but isolated from the grounding wire of the high-voltage power equipment to couple the noise generated by the background electromagnetic interference on site. Record the spectrograms (or frequency graphs) of the two broadband high-frequency signals at the same time; and co...

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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 partial discharge detection of high-voltage power equipment, belonging to the technical field of high-voltage power equipment detection, in particular to a method and device for partial discharge detection of high-voltage power 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 switchgear (GIS (Gas Insulated Switchgear) that are mainly insulated internally. It occupies an increasingly important position in the power grid. 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 manifestation of the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 陈铮铮赵健康蒙绍新刘惠民
Owner STATE GRID ELECTRIC POWER RES INST
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