含分布式电源的配电网自适应保护新方法-电网技术.PDFVIP

第 35 卷 第 10 期 电 网 技 术 Vol. 35 No. 10 2011 年 10 月 Power System Technology Oct. 2011 文章编号：1000-3673 （2011 ）10-0204-05 中图分类号：TM 77 文献标志码：A 学科代码：470·4054 含分布式电源的配电网自适应保护新方法 马静，王希，米超，王增平 （新能源电力系统国家重点实验室(华北电力大学) ，北京市 昌平区 102206 ） A New Adaptive Protection Approach for Distribution Network Containing Distributed Generation MA Jing, WANG Xi, MI Chao, WANG Zengping (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Changping District, Beijing 102206, China) ABSTRACT: A new adaptive protection approach suitable for 子矩阵 distribution network connected with distributed generations (DG) is proposed. Based on operational modes and topological 0 引言 structure of the distribution network the equivalent transform 随着能源与环境问题日益加重，以能源利用率 of the network back against the protection is performed and 高、兼容环境、适应可再生能源为特点的分布式发 according to the contribution factor matrix of branches the influences of DG on branch currents are eliminated. On this 电(distributed generation DG) 日益成为研究的热点。 basis, the criteria of main protection and backup protection are DG 与大电网联合运行，具有供电灵活性、可靠性 constructed. Comparing with traditional current protection, the 和安全性[1]等社会效益，还具有削峰填谷，降低网 proposed method expands the protection zones of protection 损，提高现有设备利用率[2]等经济效益。但在另一 and backup protection, and the calculation of the criteria is 方面，DG 的接入改变了配电网单电源辐射型结 simple and easy to set