Regional failure protection method based on power grid topological structure

Abstract

The invention relates to a regional failure protection method based on a power grid topological structure, belonging to the field of relay protection automation in a power engineering field. The method is based on intelligent interface equipment of an intelligent substation and a centralized control center (scheduling center) concentrated type regional failure protection device in which the acquisition digitization and the transmission networking are realized by adopting IEC61850 (International Electrotechnical Commission 61850) agreement regulation uniform modeling; SV (Sampling Values) and GOOSE (Generic Object Oriented Substation Event) (switch quantity input/output) real-time information are transmitted through a power communication SDH (Synchronous Digital Hierarchy) optical fiber network; a piece of regional power grid overall IED (Institution of Engineering Designers) equipment adopts the synchronous sampling based on IEE1588 (Institution of Electrical Engineers 1588) network timing; and in the concentrated regional failure protection device, the regional power grid network protocol identification, the breaker failure judgment and the fault isolation range confirmation are accomplished through the SV and GOOSE information, and GOOSE trip orders are issued through an optical fiber channel. The regional power grid integral rapid isolation strategy during breaker failure is realized; and compared with the traditional substation failure protection, the configuration is simple, the faults are isolated accurately and rapidly, and the problem of movement rejection caused by traditional cable connection is eliminated.

Description

technical field [0001] The invention relates to an area failure protection method based on the topological structure of a power grid, which belongs to the field of relay protection automation in the field of electric power engineering. Background technique [0002] At present, my country's traditional substation failure protection usually adopts the principle of configuring according to intervals or busbars. Traditional electromagnetic transformers are used to connect to each other with cables. Abnormal actions often occur due to unreliable wiring and insulation damage. The traditional 220kV substation failure protection is integrated in the busbar protection, and the dual configuration is realized according to the busbar interval; taking the 500kV substation as an example, the failure protection is configured according to the circuit breaker. Failure protection is used as near-backup protection for 220-500kV power grid lines or power equipment. When the system fails, the ci...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a regional failure protection method based on the topology of the power grid to solve the delayed isolation or inability to isolate the fault point caused by the failure of the circuit breaker when the system fails in the existing regional power grid

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