Vehicle-mounted local discharge locating system for mobile substation and locating method thereof

Abstract

The invention discloses a vehicle-mounted local discharge locating system for a mobile substation and a locating method of the vehicle-mounted local discharge locating system. Four radio frequency electromagnetic wave sensors are arranged on an automobile for receiving electromagnetic wave signals sent out from local discharge points, a signal conditioning circuit is used for amplifying and filtering the received signals, and a high-speed data sampling unit is used for synchronously collecting 4 paths of output signals and outputting the data to a data processing and analyzing unit so as to establish an equation set according to starting times when four radio frequency omnidirectional sensors receive ultrahigh frequency signals radiated by the same discharge source calculated in real time and on the basis of time differences of the four paths of received signals, solve direction angles and radial distances of the discharge signals and locate the discharge parts. According to the invention, all high-voltage equipment in the substation can be detected and located for local discharge, the cost for detecting the local discharge of the equipment can be greatly reduced, defects can be found out as soon as possible during patrol and inspection of the substation equipment, and accidents and interruption maintenance time can be reduced, so that the operation reliability and the intellectualization level of the substation can be improved and increased.

Description

technical field [0001] The invention belongs to the technical field of insulation monitoring of high-voltage power equipment, and in particular relates to a vehicle-mounted substation partial discharge positioning system and a positioning method thereof. Background technique [0002] Insulation fault is one of the most common faults in power equipment operation. Usually, before an insulation fault occurs in electrical equipment, there will be a gradual partial discharge process, and with the intensification of the discharge, it will eventually lead to insulation breakdown. If the operating equipment can be monitored and diagnosed during the partial discharge process, the partial discharge signal can be detected in time, the partial discharge source can be located, and the defects can be dealt with early, so that the occurrence of insulation breakdown faults can be effectively avoided, and targeted A comprehensive maintenance solution to reduce power outage time and improve ...

AI Technical Summary

Problems solved by technology

However, partial discharge faults may occur in any high-voltage power equipment in the substation. If you want to monitor the primary electrical equipment in the whole station, you need to install a partial discharge monitoring device on each equipment, which requires extremely high costs. Monitoring The use efficiency of the system is also low, and the maintenance workload of many online monitoring devices is also very large

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