DG接入下的配电网保护方案研究.doc

DG接入下的配电网保护方案研究
【摘要】分布式电源接入配电网后,继电保护方案需要调整,本文考虑分布式电源容量和负荷容量相匹配,在规划设计阶段进行有计划的孤岛优化划分;针对不同位置的故障,分析分布式电源对短路电流的影响,并合理?{整保护方案。基于终端之间对等交换实时数据的闭锁式广域电流保护,并使之与重合闸前加速想配合实现故障元件的快速切除。
【关键词】分布式电源;继电保护;孤岛;广域电流保护
中图分类号: TM715 文献标识码: A 文章编号: 2095-2457(2017)26-0076-002
Study on work Protection Scheme with DG Access
JIN Hong-sheng ZHANG Kai
(State Grid Zhengzhou pany,Zhengzhou Henan 450000,China)
【Abstract】After the distributed power supply is connected to the work,the relay protection scheme needs to be this paper,the distributed power capacity and load capacity are considered to be matched,and the planned islanding optimization is planned during the planning and design view of the fault of
different locations,Analysis of distributed power on the short-circuit current,and adjust the protection -time data based on the exchange of peer-to-peer latching wide-area current protection,and make it with the acceleration before reclosing to cooperate to achieve rapid removal of ponents.
【Key words】Distributed power supply;Relay protection;Isolated island;Wide area current protection
配电网接入DG后将变成一种遍布电源和负荷的互联网络,配电网的潮流、故障电流及结构都发生了变化[1]。IEEE Standard 1547标准规定:如果故障发生在DG所在馈线,DG应当停止向配电网供电。这样虽然能够消除DG接入配电网后对保护及自动重合闸装置的不良影响,但难以发挥DG的作用。
目前,不少专家、学者对DG接入配网后保护方案的进行了创新性研究[2-3],一般分为两类:一类是输电网的保护方案应用于配电网;另一类是基于目前配网的配置,提出保护整定的新算法,包括采用自适应保护原理、加装方向元件等。第一种保护方案在较高程度上依