An automatic detection method for single-phase ground fault in power system

Abstract

The invention discloses an automatic detection method of an electrical power system single-phase earth fault. The method comprises (1) single-phase earth fault automatic detection step, (2) single-phase earth fault earth point diagnosis step, and (3) single-phase earth fault removal step. The automatic detection method of the electrical power system single-phase earth fault is capable of automatically detecting an earth point of a bus having the single-phase earth fault in an electrical power system, realizing the real-time automatic detection of the electrical power system single-phase earth fault, and thus relieving the burden of a dispatcher; the dispatcher can easily respond when a single-phase earth condition occurs to a grid, and the influence on the running of the electrical system, which is caused by the automatic detection method is reduced to the minimum.

Description

technical field [0001] The invention relates to an automatic detection method for a single-phase ground fault in a power system. Background technique [0002] The main task of power system dispatchers is to ensure the safe, stable, economical and high-quality operation of the system. With the development of the national economy and the scale of the power grid, higher requirements are put forward for the reliability and economy of the power system operation, which makes dispatchers face huge challenges: on the one hand, the scale of the power grid continues to expand, the structure becomes more and more Flexible and changeable, in such a complex environment, it is becoming more and more difficult to ensure the safe operation of the system; Center, the difficulty of power grid control and the sharp increase in workload, the pressure of safe operation urgently needs the support of intelligent decision-making and rapid response capabilities. [0003] Aiming at the phenomenon o...

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Problems solved by technology

[0003] Aiming at the phenomenon of single-phase grounding of equipment that often occurs in the power grid, if the existing method is used to manually pull and close the load switches one by one to find the grounding point, it will bring a lot of workload to the dispatcher. In addition, dispatchers are required to have relevant experience in judging the location of the fault and how to deal with the fault. In order to ensure the reliable operation of the power grid and reduce the workload of the dispatcher, it is urgent to study the single-phase grounding treatment method suitable for the regional power grid