南方电网技术2024，Vol.18Issue(2)：21-29,56,10.DOI:10.13648/j.cnki.issn1674-0629.2024.02.003
基于暂态电流行波突变的LCC-MMC混合双极直流输电纵联方向保护
Longitudinal Directional Protection for LCC-MMC Hybrid Bipolar DC Transmission Based on Transient Current Traveling Wave Mutation
摘要
Abstract
Traveling wave protection is widely used as the main protection in DC lines.However,as a single-ended protection,travel-ing wave protection has the disadvantages of high maloperation and poor resistance to transition resistance.Based on the analysis of the propagation characteristics of traveling wave in DC transmission system,according to the different change directions of transient current traveling wave in internal and external faults,a longitudinal directional protection based on the transient current traveling wave mutation for LCC-MMC hybrid bipolar DC transmission system is proposed in this paper.If the mutation directions of transient current traveling waves on both sides are the same during the fault,it is an internal fault,otherwise it is an external fault.The simula-tion results of PSCAD and MATLAB show that the protection can quickly and accurately identify the faults under different fault types,different fault resistances and different fault location distance,so it has certain practicability.关键词
行波保护/混合直流输电/纵联方向保护/暂态电流行波Key words
traveling wave protection/hybrid DC transmission/longitudinal directional protection/transient current traveling wave分类
信息技术与安全科学引用本文复制引用
高淑萍,李元泽,宋国兵,吕宇星,左俊杰,沈渠旺..基于暂态电流行波突变的LCC-MMC混合双极直流输电纵联方向保护[J].南方电网技术,2024,18(2):21-29,56,10.基金项目
国家自然科学基金资助项目(51777166) （51777166）
国家自然科学基金国际合作与交流项目(52061635105) （52061635105）
国家电网公司总部科技项目(52094020006U).Supported by the National Natural Science Foundation of China(51777166) （52094020006U）
the International Cooperation and Exchange Project of the National Natural Science Foundation of China(52061635105) （52061635105）
the Headquarters Science and Technology Project of State Grid Corporation of China(52094020006U). （52094020006U）
