风电占比提高对电网接地距离保护Ⅱ段整定全局影响分析  

Analysis of Global Impact of Increasing Wind Power Proportion on Setting of Power Grid Second-zone Grounding Distance Protection

作　　者：谢钰 武志刚[1] XIE Yu;WU Zhigang(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广州510640

出　　处：《电力系统及其自动化学报》2025年第2期20-28,共9页Proceedings of the CSU-EPSA

基　　金：南方电网有限责任公司科技项目(GDKJXM20220147)。

摘　　要：从风电与电网间关系的角度研究风电占比提高短路电流分布变化对传统电力系统运行规则的影响。以接地距离保护Ⅱ段整定为例,首先结合风机的限流特性与继保整定规则分析风电占比提高对线路整定配合的影响;其次定义反映线路失配风险的指标——失配系数,并通过失配系数分析线路失配的影响因素;最后计算广东电网中线路的失配系数,并对受影响区域与网架、风电并网情况的关系进行分析。通过研究风电占比提高对实际电网整定的全局影响,从完善电源出力组合的角度提出了线路易失配时的解决方法。To study the impact of changes in short-circuit current distribution with increasing the wind power proportion on the operation rules for conventional power systems from the perspective of the relationship between wind power and power gird,the setting of second-zone grounding distance protection is taken as an example in this paper.First,with the combination of the current-limiting characteristics of wind turbines and relay protection setting rules,the impact of increasing the wind power proportion on the coordination of line settings is analyzed.Second,an index reflecting the risk of line mismatch,i.e.,mismatch coefficient,is defined,through which the factors affecting the line mismatch are analyzed.Finally,the mismatch coefficient of lines in Guangdong Power Grid is calculated,and the relationship be-tween the affected areas,network structures and wind power integration is analyzed.The global impact of increasing the wind power proportion on the actual grid setting is studied,and solutions to line mismatch are proposed from the per-spective of improving the power output combination.

关 键 词：短路电流 继电保护 接地距离保护Ⅱ段 风电 失配系数 

分 类 号：TM732[电气工程—电力系统及自动化]