西北电网330 kV尖樊线人工短路试验中接地距离保护适应性分析  

Adaptability analysis of grounding distance protection of 330 kV Jian-Fan transmission line artificial short circuit test in Northwest Branch of State Grid

作　　者：李怀强 张健康 蒋嘉桁 任龙飞 张晨浩 宋国兵[2] LI Huaiqiang;ZHANG Jiankang;JIANG Jiaheng;REN Longfei;ZHANG Chenhao;SONG Guobing(Northwest Branch of State Grid Corporation of China,Xi’an 710048,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国家电网有限公司西北分部,陕西西安710048 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电力自动化设备》2024年第3期67-74,90,共9页Electric Power Automation Equipment

基　　金：国家自然科学基金青年科学基金资助项目(52207136);国家电网有限公司西北分部科技项目(SGTYHT/21-JS-223)。

摘　　要：以风电为代表的新能源场站的故障特征对传统距离保护的附加阻抗产生了新的影响,导致保护性能降低。而现有距离保护适应性研究缺乏对单相接地故障场景的分析。为此,结合西北电网于尖樊线进行的2次人工短路试验数据,基于多种控制策略下的风电场故障特征,分析单相接地故障下接地距离保护附加阻抗系数,进而判断保护适应性。研究发现网侧保护附加阻抗系数较小,两侧电源故障电流对保护影响较小;而风电场侧保护附加阻抗系数较大,两侧电源故障电流对保护影响较大,导致保护拒动。The fault characteristics of renewable energy plants represented by wind power have a new im-pact on the additional impedance of traditional distance protection,leading to the reduction of protection performance.However,the existing research on the adaptability of distance protection lacks the analysis of the single-phase grounding cases.Therefore,based on the data of two artificial short circuit tests conducted by Northwest Branch of State Grid at Jian-Fan transmission line and the fault characteristics of wind farms under various control strategies,the additional impedance coefficient of grounding distance protection under single-phase grounding is analyzed,and then the protection adaptability is judged.It is found that the addi-tional impedance coefficient of the grid side protection is small,and the fault current of power supply on both sides has little influence on the protection.However,the additional impedance coefficient of the wind farm side protection is large,and the fault current of the power supply on both sides has a great influence on the protection,leading to protection rejection.

关 键 词：新能源场站送出线 风电场 人工短路试验 故障特征 接地距离保护 附加阻抗系数 

分 类 号：TM77[电气工程—电力系统及自动化]