考虑网络等值的自适应电流速断保护整定方法  

Setting Method for Adaptive Instantaneous Trip Current Protection Based on Network Equivalence

作　　者：丁一 王旭东[1] 戚艳[1] 李博通[2] 贾健飞 黄靓 DING Yi;WANG Xudong;QI Yan;LI Botong;JIA Jianfei;HUANG Liang(Electric Power Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300384,China;Key Laboratory of Smart Grid of Ministry of Education(Tianjin University),Tianjin 300072,China;School of Physical Science and Electronics,Central South University,Changsha 410083,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]智能电网教育部重点实验室(天津大学),天津300072 [3]中南大学物理与电子学院,长沙410083

出　　处：《电力系统及其自动化学报》2018年第7期78-82,共5页Proceedings of the CSU-EPSA

摘　　要：为加强电流速断保护定值整定对系统运行方式改变、网络结构调整以及负荷变化的响应能力,研究并提出一种基于网络等值的自适应电流速断保护整定方法。该方法利用系统正常运行时配电自动化设备采集的系统等效电源、配电线路阻抗以及负荷功率信息,通过网络等值方法计算得到保护背侧的等效相电势以及等效阻抗,继而完成保护的自适应整定。该整定方法能够反应系统运行方式的改变,有效地提高了保护整定的可靠性。To strengthen the capability of instantaneous trip current protection to respond to the changes of system operation mode,the adjustment of network structure,and the variation of load,a setting method for adaptive instantaneous trip current protection is proposed based on network equivalence.By utilizing the information of system equivalent power supply,impendences of distribution lines,and load powers,which are collected by distribution automation equipment when the system is under normal operation,the equivalent phase potential and equivalent impedance of the powerside network can be calculated using the network equivalence method.In this way,the adaptive setting of protection is completed.This setting method can respond to the changes of system operation mode,which improves the reliability of protection setting effectively.

关 键 词：自适应 电流速断保护 配电网 网络等值 

分 类 号：TM773[电气工程—电力系统及自动化]