Power distribution network feeder protection and reconfiguration scheme based on intelligent feeder terminal unit

Abstract

The invention relates to a power distribution network feeder protection and reconfiguration scheme based on an intelligent feeder terminal unit (FTU). The power distribution network feeder protection and reconfiguration scheme based on the intelligent FTU comprises the following processing methods: 1, acquisition and transmission of line real-time data by the FTU under the normal work state of the line; 2, selection of the FTU; 3, concrete strategy when short circuit fault occurs at the transient fault point; and 4, strategy when short circuit fault occurs at the permanent fault point. The power distribution network feeder protection and reconfiguration scheme based on the intelligent FTU has the advantages of realizing functions of effectively transmitting the feeder real-time data, monitoring the distribution network structure, quickly isolating fault and reconfiguring and realizing the corresponding functions of the original system configured with a master station and a secondary station by configuring the relatively simple background management machine, so that the independence of the FTU, the rapidity of fault clearing and the safety of the system are improved. The operation mode of the intelligent FTU is set, so that the intelligent FTU is based on a high-speed communication platform and does not completely depend on communication.

Description

technical field [0001] The invention relates to a protection and reconfiguration scheme for a medium-voltage (6kV, 10kV, 20kV) distribution network feeder in a power system based on an intelligent feeder automation terminal, and belongs to the technical field of distribution network feeder protection and reconfiguration. Background technique [0002] Reliability of power supply is an important technical indicator for power companies to strive for excellence, and high reliability and high-quality power supply is the basic condition for power companies to do a good job in electricity sales services. As an important technical means to improve the reliability of power supply, grid automation has been paid more and more attention by the power sector. At present, while the country is investing a lot of money in the construction and transformation of urban power grids, the distribution network automation pilot project is also included in the urban network transformation plan. For ...

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Problems solved by technology

Both need to cooperate with the master station of distribution network automation to recover. The distribution network automation system has the problem of dispatching authority and complicated installation to control the switch at the head end of the substation; the communication dependence on the FTU of the feeder automation terminal is very strong. When the communication is interrupted, the feeder The work of the automation terminal FTU is affected, and there are problems with system security; fault selectivity and power supply restoration capabilities are not well guaranteed

The local type will cause multiple impacts on the power grid when the power supply is restored, and the restoration of power supply takes a long time

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