Distribution substation low-voltage intelligent reclosing method

Abstract

The invention relates to a distribution substation low-voltage intelligent reclosing method. When a low-voltage distribution substation runs normally, a main control unit of a switching control device cyclically reads current values and switching position signals of an outlet switch to detect whether outlet circuit breakers are normal or not; and a reclosing judgment process is started when that the circuit breakers are in an open state is detected, and in the process, whether a remote / local operation selection knob is in a local position is judged first, and if the remote / local operation selection knob is in a local position, whether the circuit breakers are opened manually is judged, staff is notified through a short message, and no control treatment is performed on the site. According to the method, power supply is restored quickly through one trial closing operation, and the workload of maintenance personnel is reduced; and full consideration is given to fault information and status of a low-voltage main inlet switch and a low-voltage outlet switch in the closing process, and the heat capacity of a low-voltage cable outlet line is calculated in order to avoid blackout area expansion caused by closing accidents.

Description

technical field [0001] The invention belongs to the field of electrical operation and relates to a low-voltage distribution network, in particular to a low-voltage intelligent reclosing method for a distribution station. Background technique [0002] With the development of the smart grid, the automation of the medium voltage distribution network has begun to be promoted on a large scale. The intelligent distributed self-healing of the medium voltage and the failure of the medium voltage network can be fully automated, which greatly alleviates the It reduces the workload of operating personnel and improves the reliability of power supply, but at the same time, due to the continuous increase of low-voltage base load and the structural increase of low-voltage peak load at peak times, the pressure on low-voltage networks is increasing , reflected in the actual low-voltage management, especially prone to low-voltage failures. Contents of the invention [0003] The purpose of ...

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Problems solved by technology

[0002] With the development of the smart grid, under the circumstances that the automation of the medium voltage distribution network has begun to be promoted on a large scale, the intelligent distributed self-healing of the medium voltage and the failure of the medium voltage network can be completely automated, which greatly reduces the It reduces the workload of operating personnel and improves the reliability of power supply, but at the same time, due to the continuous increase of low-voltage base load and the structural increase of low-voltage peak load at peak times, the pressure on the low-voltage network is increasing , reflected in the actual low-voltage management, especially prone to low-voltage faults

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