低压配电系统多层级网络选择性协调保护机制技术

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Abstract Considering the limitations of short-circuit selective protection in low-voltage system, a technology of protective and coordinated mechanism in a multi-level low voltage distribution system is propound ,after analyzing the significance of early detection and peak prediction for short-circuit current in selective protection, key techniques to realize above technology are expound as well. By simulating and analyzing, the specific protection mechanism, in which multi-level network nodes and center control CPU is coordinated, and feasibility are discussed. To solve sampling synchronous error with many nodes in multi-level network and the problem of high speed communication of center control CPU, sampling synchronous using high speed external crystal and SPI communication technology which is based on optical fiber are proposed.

Key words： low voltage system selective protection in multi-level network early detection sampling synchronous high speed communication

Published: 13 January 2016

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	Articles by authors
	Su Shangliu
	Miao Xiren
	Wu Limin

Cite this article:

Su Shangliu,Miao Xiren,Wu Limin. Mechanism Technology of Coordinated Selective Protection in a Multi-level Low Voltage Distribution System[J]. Electrical Engineering, 2016, 17(1): 81-86.

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http://dqjs.cesmedia.cn/EN/Y2016/V17/I1/81

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