现代电力2024，Vol.41Issue(5)：813-821,9.DOI:10.19725/j.cnki.1007-2322.2022.0345
基于模功率差的风电经直流外送系统源端交流线路纵联保护
A Novel Pilot Protection for AC Line of Wind Power Transmitted Through DC System Based on Mode Power Difference
摘要
Abstract
The fault characteristics of AC transmission lines are significantly influenced by the access of wind farms and DC systems,rendering traditional relay protection principles inap-plicable.In this paper,we propose a new principle of pilot pro-tection for wind power transmission line based on difference of mode power.Firstly,on the basis of the single unit model,the short-circuit current expression of the doubly-fed wind farm is derived considering the interaction between the various devices of the wind farm.The establishment of a mode power calcula-tion model for the back side system feeding to the transmission line is complemented by incorporating DC system network to-pology.The protective criterion associated with the mode dif-ference and model difference is constructed by utilizing the characteristics of the fault network topology change outside the zone,aiming to identify fault sections.Finally,the proposed method is validated through experimental results conducted on the RT-LAB platform.关键词
风电直流外送系统/双馈风场/纵联保护/模分量Key words
wind power DC transmission system/double-fed wind farm/pilot protection/mode component分类
信息技术与安全科学引用本文复制引用
王亚臣,马瑞辰,张佳丽,李艳,马静..基于模功率差的风电经直流外送系统源端交流线路纵联保护[J].现代电力,2024,41(5):813-821,9.基金项目
国网山西省电力公司科技项目:新能源集中外送区域电网故障保护与控制技术研究(52053320000C). Science and Technology Project of Shanxi Electrical Power Company:Research on fault protection and control technology of regional power grid for centralized transmission of new energy(52053320000C). （52053320000C）
