Adaptive self-healing protection method applied to distribution network containing hybrid switches

Abstract

The invention discloses an adaptive self-healing protection method applied to a distribution network containing hybrid switches. The method comprises the following steps: dividing a region, and converting a regional topology into an adjacency list model; adaptively configuring intelligent terminal parameters in each region respectively according to the regional adjacency list model; performing periodic equipment self-check and communication mutual check; performing fault detection and fault type recognition; positioning and isolating a fault; recovering a non-fault line; recognizing an isolated power loss region and selecting an interconnection switch; recognizing the isolated power loss region and selecting the interconnection switch to be turned on or off according to the set arbitration rule, thereby completing load transfer; and updating the regional topology and the adjacency list thereof. The method can adaptively realize fault type recognition, fault positioning, fault isolation, non-fault regional line recovery and load transfer of the distribution network containing hybrid switches by using peer-to-peer communication and mutual cooperation of intelligent terminals, and has the characteristics of high fault positioning accuracy, high adaptive self-healing response speed 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 ...

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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

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