含高渗透率DG的配电系统区域纵联保护方案  

A Substation Area Longitudinal Protection (SALP) Scheme for Distribution System with High DG Penetration

作　　者：丛伟[1] 潘贞存[1] 王成山[2] 于春光[1] 王伟[1] 荀堂生 宋志明 

机构地区：[1]山东大学电气工程学院,山东省济南市250061 [2]天津大学电力系统仿真控制教育部重点实验室,天津市300072 [3]山东电力学校,山东省泰安市271000

出　　处：《电力系统自动化》2009年第10期81-85,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50807032);山东省优秀中青年科学家科研奖励基金资助项目(2007BS01007)~~

摘　　要：近年来分布式发电技术得到了快速发展,配电系统中分布式电源(DG)的渗透率水平不断提高。多个DG的并入将会使配电系统短路电流的大小、流向和分布发生较大变化,将会导致传统的阶段式过电流保护无法正常工作。为了满足含高渗透率DG的配电系统对继电保护的要求,解决现有保护技术存在的问题,提出了一种以纵联比较保护原理为基础、以通信为支撑、以包含DG的配电变电站及其馈线为保护对象的主从式区域纵联保护方案。讨论了保护系统工作的方式,研究了故障检测与定位的基本方法。Distribution generation （DG） technology has been rapidly developed and the DG penetration level is becoming higher and higher in the distribution system in recent years. The magnitude, direction and distribution of the short circuit current in distribution power system have changed a lot due to the introduction of DGs. This has brought several problems to the traditional staged over current protection devices and may cause them mal-operation. To satisfy the requirements and resolve the existing problems of the relay protection of the distribution systems under high DG penetration level, a new protection scheme is introduced. The new protection scheme is based on longitudinal comparison principle. With the foundation of communication technology, the new scheme is a kind of substation area longitudinal protection with master-slave structure, for the purpose of protecting the whole distribution substation and all of its outgoing feeders that are under high DG penetration level. The operation procedure and fault location method of the protection system is described.

关 键 词：配电系统 分布式电源 区域纵联保护 通信 

分 类 号：TM773[电气工程—电力系统及自动化]