高电压技术2024，Vol.50Issue(5)：2067-2077,中插19-中插22,15.DOI:10.13336/j.1003-6520.hve.20221081
适用于MMC-MTDC的母线侧故障分析及保护策略
Bus-side Fault Analysis and Protection Strategy for MMC-MTDC
摘要
Abstract
The analysis and discrimination of DC faults is an important problem that needs to be solved in the flexible DC system.This paper derives a bus-side simplified circuit fault calculation method for MMC-MTDC and analyzes the fault characteristics of bus-side pole-to-ground fault and pole-to-pole short circuit fault.Based on the results above,a fault dis-crimination scheme for multi-terminated flexible DC transmission networks are designed.The discriminative scheme uses three modules for fault discrimination,and adopts the post-fault voltage dip peak and post-fault line current value as the fault characteristic quantity,and the whole discriminative scheme is not affected by other component parameters,fault lo-cation and other factors.The combination of Spearman correlation analysis and traditional electrical fault area discrimination accurately determines faults within and outside the system area,while solving the problem of misjudgment caused by interference of line parameters in fault area discrimination,and the simulation test verifies the feasibility of this protection scheme.关键词
MMC-HVDC/直流故障/母线侧故障/故障特征/Spearman相关性分析/保护设计Key words
MMC-MTDC/DC fault/bus-side fault/fault characteristics/Spearman correlation analysis/protection design引用本文复制引用
鄢仁武,俞智鹏,方略斌..适用于MMC-MTDC的母线侧故障分析及保护策略[J].高电压技术,2024,50(5):2067-2077,中插19-中插22,15.基金项目
国家自然科学基金(51677059).Project supported by National Natural Science Foundation of China(51677059). （51677059）
