一种基于d轴参考电流的受端孤岛检测法  

A d-Axis Reference Current Based Receiving-End Isolated Island Detection Method

作　　者：王渝红[1] 叶葳 李天泽 陈勇 周旭 WANG Yuhong;YE Wei;LI Tianze;CHEN Yong;ZHOU Xu(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院

出　　处：《南方电网技术》2019年第12期34-40,共7页Southern Power System Technology

摘　　要：针对基于频率与相位的传统被动孤岛检测法在实际应用中判据较多、检测时间较长的问题,结合柔性直流输电系统逆变站控制环节特性,提出了一种基于d轴参考电流的受端孤岛检测法。该方法根据d轴参考电流对孤岛情况响应迅速且能有效躲避大干扰下误判断的特性,将其作为孤岛检测判据,并通过计算分析给出了其阈值整定方法。最后搭建交直流混联模型进行仿真,验证了所提孤岛检测方法的有效性、准确性及快捷性。In order to solve the problem that there are many criterion in the traditional passive isolated island detection method based on frequency and phase and the switching process is long in the actual flexible HVDC system,based on the actual situation of flexible DC transmission system,a d-axis reference current islanding detection method for AC/DC hybrid power grid is proposed. In this method,the output d-axis reference current of the outer loop controller is used as the criterion,and the threshold setting method is given according to the characteristics of the outer loop controller,which changes obviously under the condition of isolated island and can effectively avoid misjudgment. Finally,an AC/DC hybrid connecting simulation model is built to verify the effectiveness,accuracy and convenience of the isolated island detection method proposed in this paper.

关 键 词：柔性直流输电 交直流并列运行 孤岛检测 

分 类 号：TM721[电气工程—电力系统及自动化]