含分布式电源配电网的快速电流保护方案  

A Fast Current Protection Scheme for Distribution System with Distributed Generations

作　　者：孙景钌[1] 李永丽[1] 李盛伟[1] 金强[1] 

机构地区：[1]天津大学电力系统仿真控制教育部重点实验室,天津300072

出　　处：《天津大学学报》2010年第2期102-108,共7页Journal of Tianjin University(Science and Technology)

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB219704);国家高技术研究发展计划(863计划)资助项目(2007AA05Z241);天津市自然科学基金资助项目(08JCYBJC13500)

摘　　要：为了能更快地切除故障,在对含分布式电源(DG)配电系统进行故障分析的基础上,提出了一种适用于含DG配电网的快速电流保护方案.该方案需要在DG的上游区域为每个保护配置OC、DGOC、AOC、DGAOC 4个独立的保护模块,其中加速模块AOC和DGAOC可以利用跳开端断路器的动作信息来加速断开本端断路器.故障发生后,根据方向元件的判断结果,相应的保护模块可以自适应地启动并正确动作.仿真结果表明,该方案能够在不改变配电系统原有断路器配置的前提下快速地将故障线路从两端切除,并且不用将DG退出运行,可以使其继续维持对周围负荷的供电.因此,该保护方案能够改善含DG配电系统的保护性能.Based on fault analysis of the distribution system with distributed generations（DGs）,a fast current protection scheme has been proposed to clear the fault quickly.In the scheme four independent protection modules OC,DGOC,AOC and DGAOC are configured for each relay at the upstream side of DG,among which the acceleration modules AOC and DGAOC can speed up the operation of relays following the operation of the circuit breaker at the remote end.After a fault occurs,the relevant protection modules can startup adaptively and operate correctly according to judgement of the direction component.Simulation results show that,with the proposed scheme,the fault line can be cut off quickly at two ends without changing the original configuration of the circuit breakers or disconnecting DG,so that it continues to supply power for loads around.Therefore,the proposed protection scheme can improve the protection performance of the distribution system with DG.

关 键 词：分布式发电 配电网 故障分析 快速电流保护方案 

分 类 号：TM773[电气工程—电力系统及自动化]