中国电机工程学报2024，Vol.44Issue(22)：8819-8833,中插11,16.DOI:10.13334/j.0258-8013.pcsee.231005
基于归一化标准面积差的多端LCC-MMC-HVDC高灵敏性主保护判据
Extra-sensitive Main Protection for Multi-terminal LCC-MMC-HVDC Based on Normalized Area Differential Criterion
摘要
Abstract
HVDCs with a large-capacity line commuted convertor(LCC)converter as a sending end and several full-half-bridge modular multilevel converter(FHMMC)as multi-terminal receiving ends,naming the LCC modular multilevel converter based HVDC(LCC-MMC-HVDC),is a significant recent advance in the field of DC power transmission,and it has long been a hot issue for the protection technique,especially for main protection elements.In this paper,the initial wave feature of each relay location,under internal/external fault scenarios,is analyzed and summarized,and the general feature of the forward/backward traveling waves is deduced.Based on the feature difference of the initial backward wave under internal/external fault conditions,a protection criterion is put forward based on normalized area difference.Internal fault is distinguished from external ones according to the polarity of the normalized area difference,which is positive under internal fault conditions and negative in external fault scenarios.Reverse faults are avoided reliably with the help of the active inserted noise.Simulation results indicate that the proposed protection has definite selectivity,and the sensitivity can be as high as 600 Ω,which is sufficient in terms of a power system of 800 kV.关键词
混合多端直流/主保护/行波/灵敏性Key words
LCC modular multilevel converter based HVDC/main protection/traveling wave/sensitivity分类
信息技术与安全科学引用本文复制引用
曾鑫洁,谢志成,陈珂瑶,李俊,杨楠,童宁..基于归一化标准面积差的多端LCC-MMC-HVDC高灵敏性主保护判据[J].中国电机工程学报,2024,44(22):8819-8833,中插11,16.基金项目
国家自然科学基金项目(51907069) （51907069）
广东省自然科学基金项目(2022A1515011079,2024A1515012720) （2022A1515011079,2024A1515012720）
广州市基础研究计划基础与应用基础研究项目(202201010188). Project Supported by National Natural Science Foundation of China(51907069) （202201010188）
Natural Science Foundation of Guangdong Province(2022A1515011079,2024A1515012720) （2022A1515011079,2024A1515012720）
Science and Technology Program of Guangzhou(202201010188). （202201010188）
