电力系统自动化2013，Vol.37Issue(4)：98-103,6.DOI:10.7500/AEPS201204061
交直流混联电网工频变化量距离保护动作特性分析
Performance Analysis of Distance Protection Based on Industrial Frequency Variation Applied to AC-DC Hybrid Power Grid
摘要
Abstract
The performance of the distance protection based on industrial frequency variation in an AC-DC hybrid power grid is discussed.When faults occur on the AC transmission lines close to the converter station at the receiving or sending end, due to the impact of control system, the DC system has characteristics of a weak power source and its equivalent impedance is significant.The operation range of distance protection is closely related to the ratios of system equivalent impedance and setting impedance, and the smaller of the ratios, the larger of the protection operating range.Therefore, the operating range of distance protection reduces greatly and it can lead to the under-reach and even operating failure of the protection.Finally, the correctness of theoretical analysis is verified by the real time digital system experiment data.关键词
交直流混联电网/直流输电/工频变化量/距离保护Key words
AC-DC hybrid power grid/ direct current transmission/ industrial frequency variation/ distance protection引用本文复制引用
张健康,索南加乐,何方明,粟小华,汪宁渤,马彦宏..交直流混联电网工频变化量距离保护动作特性分析[J].电力系统自动化,2013,37(4):98-103,6.基金项目
国家自然科学基金资助项目(50677051,50877061) （50677051,50877061）
国家重点基础研究发展计划(973计划)资助项目(2009CB219704). （973计划）
