AC system branch fault monitoring system and method

Abstract

The invention discloses an AC system branch fault monitoring system and method. The system comprises a control CPU, a voltage collection module, a current collection module and a communication module, wherein the voltage collection module collects the bus voltage of an alternating current system, the current collection module collects at least two paths of current, and the communication module transmits a voltage signal acquired by the voltage acquisition module and a current signal acquired by the current acquisition module to the control CPU. The voltage, load current and residual current changes of each power supply line are monitored respectively, the AC system branch fault monitoring system collects voltage signals and current signals of each line, AC feeder branch faults are analyzed according to monitoring data, the lines needing to be monitored are monitored in a targeted mode, the faults are found in time, the cost is saved, the maintenance efficiency of maintenance personnel is improved, and the power supply safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric power equipment, in particular to a system and method for monitoring AC system branch faults. Background technique [0002] The station AC system is an indispensable link to ensure the safe and reliable transmission of electric energy in the substation. The station electric energy mainly provides power for the primary and secondary equipment of the substation, and supplies power for the forced oil circulation cooling system of the large transformer. It can be used as an AC operation It can be used as AC power supply for UPS, SF6 gas monitoring device, exhaust fan power supply for normal and emergency use, lighting and other living power supply, so the station is used Communication systems are critical. [0003] The power supply of the station AC system comes out from the station substation to the station feeder panel. Both the feeder panel and the outgoing power supply line are sections that nee...

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Problems solved by technology

[0003] The power supply of the station AC system comes out from the station substation to the station feeder panel. Both the feeder panel and the outgoing power supply line are sections that need to be monitored. However, there is no way to alarm for insulation faults, short circuit faults, and defect faults on the AC power supply line. Maintenance Human beings cannot find faults in time, resulting in maintenance personnel being unable to repair in time

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