A distribution network area protection and self-healing system

Abstract

The invention discloses a distribution network area protecting and self-healing system. The distribution network area protecting and self-healing system comprises a transformer substation and a spacer layer, wherein the spacer layer consists of a plurality of user devices; signals are transmitted via a communication channel; the user devices are electrically connected with a bus on a low voltage side in the transformer substation by a power distribution circuit; a control substation is arranged in the transformer substation and is connected with a feeder protecting device and a distant automatic bus transfer device through the communication channel; the feeder protecting device outputs make and break signals to a medium-voltage feeder switch in the transformer substation; the user devices on the power distribution circuit are connected with circuit breakers; each circuit breaker is connected with a corresponding power distribution terminal device; the power distribution terminal devices are connected to the communication channel via terminal communication devices; and the distant automatic bus transfer device is connected with the user devices and the communication channel. Fault points in a distribution network area are isolated from one another; the power supply of areas without fault points is rapidly recovered; large-range and long-time power failure is avoided; power is stably supplied for important loads of a distribution network; and economic losses caused by power failure are reduced.

Description

technical field [0001] The invention relates to a power protection system, in particular to a distribution network area protection and self-healing system. Background technique [0002] In the existing power system, the power distribution network system can be divided into the main station layer, the regional layer and the bay layer according to the region. The regional layer includes several substations, the interval layer includes user equipment for daily power consumption, and the master station layer mainly manages the grid data of each substation and user equipment. Usually, each substation is equipped with a control substation and a feeder protection device, and the feeder protection device is used to control the opening and closing of the medium-voltage feeder switch of the substation. The area and compartment layers are mainly connected by the distribution lines from the substation output to the user equipment. The existing fault handling method of the distribution...

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Problems solved by technology

It is so easy to cause a large-scale power outage in the fault area, especially for important loads in the distribution network, if the power supply cannot be supplied in time, it will cause major losses in economic production

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