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

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 ...

AI Technical Summary

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 the application is difficult

The angle measurement method is easily affected by Non-Line-of-Sight (NLOS) and is not suitable for the localization of partial discharge in substations.

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