基于突变量阻抗波形相关性的送出线路纵联保护研究  

Research on pilot protection of outgoing transmission line based on correlation of variable impedance waveform

作　　者：刘洪金 杨炳元[1] 粱佳宇 蔡文超 张玉振 Liu Hongjin;Yang Bingyuan;Liang Jiayu;Cai Wenchao;Zhang Yuzhen(college of Electric Power of Inner Mongolia University of Technology,Hohhot010051,China;Inner Mongolia Electric Power Research Institute,Hohhot010020,China;Dongying Power Supply Company of State Grid Shandong Electric Power Company,Dongying257000,China)

机构地区：[1]内蒙古工业大学电力学院,内蒙古呼和浩特010051 [2]内蒙古电力科学研究院,内蒙古呼和浩特010020 [3]国网山东省电力公司东营供电公司,山东东营257000

出　　处：《可再生能源》2021年第6期803-810,共8页Renewable Energy Resources

基　　金：内蒙古自治区自然科学基金(2018LH05032)。

摘　　要：文章对风光可再生能源场站送出线路的纵联保护方案进行研究,分析了风光可再生能源场站和传统电源的阻抗特征,在送出线路两侧保护安装处提取等效正序突变量阻抗波形,并通过Pearson相关系数来衡量阻抗波形的相关度。在RTDS仿真平台中,以内蒙古某风光可再生能源场站为例,验证了所提的保护原理对一侧为风光可再生能源场站,另一侧为传统电源构成的系统,送出线路发生各种短路故障都具备良好的适应性。The article focuses on the pilot protection of the outgoing lines of wind and solar renewable energy fields.The impedance characteristics of wind and solar renewable energy stations and traditional power sources are analyzed theoretically,and the Pearson correlation coefficient is used to measure the correlation of the equivalent positive sequence variable impedance waveforms extracted from the protection installations on both sides of outgoing transmission line.In the RTDS simulation platform,a system model of wind-solar renewable energy stations was built on the basis of an actual wind field in Inner Mongolia.It is verified that the proposed protection principle has good adaptability when the outgoing lines fails when the system consisting of wind-solar renewable energy stations on one side and traditional power sources on the other side.

关 键 词：风光可再生能源场站 Pearson相关系数 纵联保护 突变量阻抗 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程] TK51