电力系统保护与控制2026，Vol.54Issue(3)：89-98,10.DOI:10.19783/j.cnki.pspc.256125
新能源并网线路阻抗补偿时域距离保护方法
Time-domain distance protection method for new energy-integrated lines based on impedance compensation
摘要
Abstract
When ground faults occur on new energy-integrated lines,the weak fault current injection and strong controllability of new energy sources can degrade distance protection performance.To address the insufficient sensitivity of conventional power-frequency distance protection during ground faults with transition resistance on new energy-integrated lines and the low reliability of conventional time-domain distance protection,this paper proposes a time-domain distance protection method based on impedance compensation for single-phase-to-ground faults.First,the equivalent transition resistance at the fault point is solved in real time by establishing time-domain equations.Then,the relationship between the additional impedance and the equivalent transition resistance is established to derive an accurate impedance compensation model,forming the impedance-compensated time-domain distance protection criterion.Finally,PSCAD/EMTDC simulations verify that the proposed scheme significantly enhances the sensitivity of distance protection during transition resistance faults while ensuring reliability,demonstrating practical applicability for new energy integration via AC lines.关键词
距离保护/新能源并网/适应性分析/过渡电阻/阻抗补偿Key words
distance protection/new energy integration/adaptability analysis/transition resistance/impedance compensation引用本文复制引用
王朝明,孙志攀,洪丰,吴通华,戴魏,江源..新能源并网线路阻抗补偿时域距离保护方法[J].电力系统保护与控制,2026,54(3):89-98,10.基金项目
This work is supported by the National Key Research and Development Program of China(No.2021YFB2401000). 国家重点研发计划项目资助(2021YFB2401000) （No.2021YFB2401000）
