Matlab / Simulink based power cable partial discharge signal propagation simulation method

A power cable and discharge signal technology, which is applied in the simulation field of power cable partial discharge signal propagation, can solve the problems of insufficient positioning accuracy of partial discharge reflected waves, achieve the effect of strong versatility and improve positioning accuracy

Inactive Publication Date: 2016-03-09
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

In order to improve the current partial discharge detection equipment for power cables, the positioning accuracy of partial discharge reflection waves is insufficient, and operators need to subjectively determine partial discharge reflection waves based on their own experience.

Method used

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  • Matlab / Simulink based power cable partial discharge signal propagation simulation method
  • Matlab / Simulink based power cable partial discharge signal propagation simulation method
  • Matlab / Simulink based power cable partial discharge signal propagation simulation method

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Embodiment

[0050] figure 1 It is a schematic diagram of the working condition of the partial discharge of the power cable simulated by the simulation of the present invention. A partial discharge phenomenon occurs at a point C in the middle of a section of power cable AB. During the partial discharge test, the partial discharge pulse signal will be generated from point C and propagate in the cable, and will be continuously reflected at the cable ports A and B. The local detection equipment detects the transmitted partial discharge pulse signal and its reflected wave through the sensor at the power cable port A or B, and judges the partial discharge belief and locates the partial discharge point accordingly.

[0051] figure 2 It is a simulation model of power cable partial discharge signal propagation built in Matlab / Simulink software according to the present invention. The function of module 1 in the figure is to generate the required simulated partial discharge pulse signal according...

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Abstract

Provided is a Matlab / Simulink based power cable partial discharge signal propagation simulation method. The method comprises the following steps: 1) establishing a power cable distributed parameter model suitable for research on high-frequency partial discharge signal propagation properties; 2) by analysis on power cable partial discharge signal properties, establishing a simulation partial discharge signal; 3) establishing a simulation model of partial discharge wave propagation properties in a high-voltage power cable; and 4) timely outputting a simulation result of the simulation model. The method has the beneficial effects of realizing accurate stimulation of the partial discharge signal propagation properties in the power cable; and having excellent versatility, and timely outputting the simulation result of the simulation model, thereby effectively improving positioning precision of test on a partial discharge reflected wave, and providing a certain foundation for further research on detection of power cable partial discharge.

Description

technical field [0001] The invention relates to a simulation method of partial discharge signal propagation of power cables, in particular to a simulation method of partial discharge signal propagation of power cables based on Matlab / Simulink, which belongs to the research and auxiliary measurement of partial discharge testing and auxiliary measurement of high-voltage power cables in the power industry technology field. Background technique [0002] The oscillating wave voltage detection method (OscillatingWaveTestSystem) is a technology with good application effect for the detection and location of partial discharge in power cables. Oscillating wave voltage has good equivalence with AC power supply, and the partial discharge behavior is similar, which can effectively detect partial discharge defects of power cables. This detection method has a short action time and will not cause damage to the cable. It is an ideal experimental method for the handover test after the comple...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367G06F2113/16Y02E60/00
Inventor 董涛张泓张博刘柱揆毕志周于虹程志万
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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