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Regional failure protection method based on power grid topological structure

A network topology, failure protection technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of inability to isolate, delay isolation of fault points, etc., to achieve simple configuration, elimination of refusal problems, and accurate and rapid fault isolation.

Inactive Publication Date: 2012-12-19
XJ ELECTRIC +2
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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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  • Regional failure protection method based on power grid topological structure
  • Regional failure protection method based on power grid topological structure
  • Regional failure protection method based on power grid topological structure

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Embodiment Construction

[0017] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] like figure 2 The structure of the regional failure protection system of the smart grid is shown, including setting the regional failure protection device, substation A and substation B in the centralized control center. The 1588 network realizes the communication connection. Both substation A and substation B are equipped with smart interfaces. The switches in substation A and substation B are connected with their respective smart interfaces. The intelligent interface also adopts the unified modeling of the IEC 61850 standard. The IEEE 1588 network time synchronization mode is used between the regional failure protection method and the substation to realize the synchronous sampling of the regional power grid, and the real-time communication is realized through the power real-time communication SDH optical network. The substation in...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 雷振锋杨恢宏余高旺王兆庆张新萍戚振伟程天宝冯秋芳赵瑞东李贞
Owner XJ ELECTRIC
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