Partial discharge signal location method and system of two-stage substation

A discharge signal and partial discharge technology, applied in the direction of testing dielectric strength, etc., can solve the problems of unsuitability for substations, difficult application, high hardware cost, etc., and achieve the effects of low measurement difficulty, high positioning accuracy, and reduced positioning costs

Active Publication Date: 2018-09-04
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Among them, the time difference method requires high-precision time synchronization between the UHF sensor and the signal acquisition system, so the hardware overhead is large and

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  • Partial discharge signal location method and system of two-stage substation
  • Partial discharge signal location method and system of two-stage substation
  • Partial discharge signal location method and system of two-stage substation

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Embodiment Construction

[0053] The method and system for locating partial discharge signals in two-stage substations according to the present invention will be further explained and described in conjunction with the drawings and specific embodiments below. However, the explanations and descriptions do not constitute improper limitations on the technical solution of the present invention.

[0054] figure 1 It is a schematic flowchart of an implementation mode of the two-stage substation partial discharge signal locating method according to the present invention.

[0055] Such as figure 1 As shown, the two-stage substation partial discharge signal locating method in this embodiment first uses the ultra-high frequency sensor AP 1 、AP 2 、AP 3 and AP 4 The partial discharge signal generated by the simulated partial discharge source is collected to construct the simulated partial discharge signal intensity distribution characteristic matrix Ψ, and then the simulated partial discharge intensity characte...

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Abstract

The invention discloses a partial discharge signal location method of a two-stage substation. The method comprises: step one, constructing a simulated partial discharge signal intensity distribution characteristic matrix tau; step two, carrying out clustering on simulated partial discharge intensity characteristic vectors in the simulated partial discharge signal intensity distribution characteristic matrix to obtain C classes; step three, collecting partial discharge signals by using n ultra-high-frequency sensors and acquiring corresponding practically measured partial discharge intensity characteristic vectors in a state of occurrence of partial discharging; step four, carrying out preliminary positioning on the partial discharge signals to reduce the positioning range; and step five, carrying out precise positioning on the partial discharge signals based on a compressed sensing algorithm. In addition, the invention also discloses a partial discharge signal location system of a two-stage substation. The location method and system have advantages of low measurement difficulty, low requirements on equipment hardware, and high positioning accuracy; and while the high positioning accuracy is ensured, the cost of power equipment is lowered.

Description

technical field [0001] The invention relates to a positioning method and system, in particular to a positioning method and system for partial discharge signals. Background technique [0002] Reliability is a basic requirement of power systems. However, some faults will inevitably occur in the power system during operation, especially in substations with higher voltage levels, due to defects in power equipment and some external reasons, the insulation performance of the equipment may decline, and then under the action of high voltage, It will cause insulation breakdown, which will have serious consequences. Therefore, it is very important to monitor the insulation performance of the power equipment in the substation, and the decline of the insulation performance of the power equipment is often manifested as the occurrence of partial discharge, so effective partial discharge location can quickly and accurately find out the insulation performance of the power equipment in the ...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 罗林根李臻周南盛戈皞钱勇刘亚东宋辉江秀臣
Owner SHANGHAI JIAO TONG UNIV
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