中国电机工程学报2026，Vol.46Issue(14)：5772-5782,中插6,12.DOI:10.13334/j.0258-8013.pcsee.250865
适用于逆变型电源送出线路的自适应补偿距离保护原理
Adaptive Compensation Based Distance Protection Principle for Transmission Lines Supplied by Inverter-based Resources
摘要
Abstract
Due to the weak infeed characteristics of converters and the influence of control strategies,the fault current magnitude and phase of inverter-based resources(IBRs)are highly controllable,leading to poor transition resistance tolerance of conventional distance protection schemes.Under high transition resistance conditions,especially during asymmetric faults,distance protection on the IBR side of the transmission line may fail to operate correctly.This paper proposes a distance protection principle based on adaptive compensation using characteristic harmonics.By employing the high controllability of power electronic converters,the method monitors the variation of the converter's output equivalent impedance in real time.According to the severity of the fault,the converter injects characteristic harmonic signals adaptively to compensate for the magnitude and phase of the IBR-side fault current.The protection logic is built on the relationship between the measured impedance and a preset impedance at the harmonic frequency.This approach reduces the influence of transition resistance from the protection principle and effectively addresses the malfunction of distance protection under weak infeed conditions.The proposed protection is independent of converter capacity or the installed capacity of the new energy station.It offers strong tolerance to transition resistance and demonstrates strong immunity to noise.Simulation studies based on a modified IEEE 9-bus test system in PSCAD/EMTDC confirm that the proposed scheme is suitable for transmission line protection involving inverter-based renewable energy sources.关键词
逆变型电源送出线路/特征谐波注入/自适应补偿距离保护/过渡电阻/新能源场站Key words
transmission line of inverter-based resources/characteristic harmonic injection/adaptive compensation based distance protection/transition resistance/new energy station分类
信息技术与安全科学引用本文复制引用
赵兴乾,郑晓冬,韩正谦,晁晨栩,邰能灵,刘中平,侯勇,贺超凡..适用于逆变型电源送出线路的自适应补偿距离保护原理[J].中国电机工程学报,2026,46(14):5772-5782,中插6,12.基金项目
国家自然科学基金项目(52277112) （52277112）
国家重点研发计划项目(2024YFB4206501) （2024YFB4206501）
国家电网有限公司科技项目(SGSHCMOOHWJS2200750).Project Supported by National Natural Science Foundation of China(52277112) （SGSHCMOOHWJS2200750）
National Key R&D Program of China(2024YFB4206501) （2024YFB4206501）
Science and Technology Project of State Grid Corporation of China(SGSHCMOOHWJS2200750). （SGSHCMOOHWJS2200750）
