An adaptive self-healing protection method applied to distribution network with hybrid switch

Abstract

The invention discloses an adaptive self-healing protection method applied to a distribution network containing a hybrid switch, comprising the following steps: dividing the area, and transforming the area topology into an adjacency list model; Configure intelligent terminal parameters in each area; periodic equipment self-inspection and communication mutual inspection; fault detection and fault type identification; fault location and fault isolation; non-fault line recovery; isolated power-off area identification and contact switch selection; Identify the area and select the tie switch to close according to the set arbitration rules to complete the load transfer; the area topology and its adjacency table are updated. The invention is used for peer-to-peer communication and mutual cooperation between intelligent terminals, and can adaptively realize fault type identification, fault location, fault isolation, recovery of non-faulty area lines, and load transfer of a distribution network system containing a hybrid switch. It has the characteristics of high fault location accuracy, fast adaptive self-healing response, and strong practicability.

Description

technical field [0001] The invention relates to the technical field of distribution network protection, in particular to an adaptive self-healing protection method applied to a distribution network containing hybrid switches. Background technique [0002] The power system consists of power generation, transmission, transformation, distribution and users. The distribution network is the end of the entire power system. It directly faces the end users and undertakes the task of distributing and transmitting power to users. It is an extremely important link in the power system. As people's requirements for power supply reliability increase, the traditional distribution network continues to develop in the direction of intelligence. The development of the smart grid presents the following characteristics: (1) Distributed power sources (such as photovoltaic, wind power, and gas power generation) continue to penetrate into the distribution network, and the distribution network has ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the traditional distribution network protection systems that adopt the form of quick-break and time-limited quick-break protection can effectively protect the lines for the existing radial distribution network, but there is a protection dead zone when the distributed power system is connected.

On the other hand, for distribution networks with different types of switches (circuit breakers, load switches, disconnectors), independent switches and ring main units, as well as the mix and match of feeder terminal equipment (FTU) and station terminal equipment (DTU) , the traditional relay protection scheme is no longer applicable

Images