基于分布式发电与配电自动化的复杂故障分析  

Analysis of a Complex Fault in Distribution Network Based on DG and DA

作　　者：庞霞 胡春花 施伟成 许杏桃 欧阳菲菲 李然 PANG Xia;HU Chunhua;SHI Weicheng;XU Xingtao;OUYANG Feifei;LI Ran(State Grid Jiangsu Technician Training Center, Nanjing 210042;Zhenjiang College, Zhenjiang 212028;State Grid Zhenjiang Power Supply Company, Zhenjiang 212050;Jiangsu Anfang Power Technology Co., Ltd. Taizhou 225300)

机构地区：[1]国网江苏省电力有限公司技能培训中心,江苏南京210042 [2]镇江市高等专科学校,江苏镇江212028 [3]国网镇江供电公司,江苏镇江212050 [4]江苏安方电力科技有限公司,江苏泰州225300

出　　处：《常州工学院学报》2019年第1期88-92,共5页Journal of Changzhou Institute of Technology

基　　金：镇江市科技创新资金项目(SH2016015;GY2017026);江苏省科学技术厅社会发展面上项目(BE2016727)

摘　　要：含有分布式发电系统的电网中两段10kV母线相继发生故障,引起110kV主变低后备保护动作,进而导致10kV线路孤岛运行的复杂故障。基于变电站设备参数和保护配置,分析故障波形和安全自动装置动作逻辑,得出继电保护动作正确的结论。为避免类似情况发生,对于继电保护和安全自动装置整定提出检测分段开关遥信位置、分级切除两段母线和主变低后备保护联切分布式发电系统3种解决方案。A complex fault of 10 kV island operation is formed by the sequential failures causing 110 kV main low backup protection action in the two 10 kV distribution power systems. The fault waveform and relay protection action logic are analyzed in terms of the substation equipment parameters and safety automatic device settings. The conclusion that the relay protection actions are correct is obtained. To avoid similar situations, three solutions are proposed for relay protection and safety automatic devices settings: detecting segmentation switch status, cutting off main bus in turn and isolating distributed generation system.

关 键 词：配电自动化 继电保护 孤岛运行 低频低压减载 

分 类 号：TM773[电气工程—电力系统及自动化]