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Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus

A gas-insulated combination and partial discharge technology, which is used in positioning, radio wave measurement systems, instruments, etc., can solve the problem of small calculation amount of positioning accuracy, and achieve the effect of small calculation amount, simple operation method and improved anti-interference ability.

Active Publication Date: 2010-10-20
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to aim at the shortcomings of the positioning method of the existing GIS partial discharge on-line monitoring device, and to provide an on-line partial discharge monitoring system for gas insulated combined electrical appliances with the characteristics of high positioning accuracy, simple operation method and small calculation amount. Monitoring and positioning method

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  • Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus
  • Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus
  • Method for on-line monitoring and positioning of partial discharge of gas insulation combined electrical apparatus

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Embodiment Construction

[0040] figure 1 Among them, 1. Sensor antenna (existing microstrip antenna can be used); 2. Intelligent selection switch (radio frequency switch, talent brand single-pole multi-throw switch CH2); 3. Signal conditioning circuit; 4. High-speed digital collector (Tektronix TDS5104B oscilloscope , the highest rate is 5GS / s, the recording length can reach 16m, the bandwidth of 1GHz); 5, the processor (AT89C2051 single-chip microcomputer); 6, the control module.

[0041] figure 1 It is a schematic diagram of the system structure implementing the hardware of the present invention. The system includes a sensor composed of multiple antennas for detecting partial discharge signals arranged outside the GIS, an intelligent selection switch 2, a signal conditioning circuit 3, a high-speed digital collector 4, a processor 5 and a control module 6. figure 2 is a flowchart of the present invention. When a partial discharge occurs inside the GIS to generate a steep discharge pulse signal, ...

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Abstract

The invention discloses a method for on-line monitoring and positioning of partial discharge of a gas insulation combined electrical apparatus, which belongs to the technical field of insulation monitoring of electrical equipment. The gas insulation combined electrical apparatus mainly comprises a sensor antenna, an intelligent select switch, a high-speed digital collector, a processor, a control module and the like; and in the method, data fitting is performed on partial discharge signals received by the sensor antenna through a wave head fitting algorithm, and a simple approximate function is solved to reflect the overall change trend of a primary function, so a source point of the partial discharge can be accurately determined. The method can effectively detect the partial discharge of a GIS, automatically monitor the partial discharge inside the GIS on line, and improve the anti-jamming capability of a detection system.

Description

technical field [0001] The invention belongs to an electrical equipment insulation monitoring and positioning method, in particular to SF 6 On-line partial discharge monitoring and discharge source location method for gas-insulated combined electrical appliances. Background technique [0002] SF 6 Gas is an excellent insulating medium and arc-extinguishing medium. It has the characteristics of non-toxic, non-flammable, high dielectric strength and arc-extinguishing ability far exceeding ordinary dielectrics. Therefore, SF 6 Gas-insulated combined electric appliances are small in size, small in floor space, light in weight, and have no fire hazard, thereby greatly improving the reliability of the power system. SF 6 The emergence and application of gas insulated substations (GIS) have broken the concept of traditional substations, providing a broad space for the development of compact high-voltage, large-capacity new substations. However, it is precisely because of the cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01S5/00
Inventor 甘德刚刘平曾奕刘凡肖伟
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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