西安工程大学学报2024，Vol.38Issue(2)：26-33,8.DOI:10.13338/j.issn.1674-649x.2024.02.004
基于余弦相似度算法的混合级联直流输电线路保护新方案
A new protection scheme for hybrid cascaded HVDC transmission lines based on cosine similarity algorithm
摘要
Abstract
In order to improve the speed and reliability of DC transmission line protection in hy-brid cascade DC transmission system,a hybrid cascade DC transmission line protection principle based on cosine similarity algorithm was proposed.When the line fault of the hybrid cascade DC transmission system was made,the current and voltage would change,so the voltage and current transient components at the first and last end of the transmission line were used to compare the differences of current and voltage fault components through data standardization and cosine simi-larity algorithm,so as to complete the accurate identification of faults inside and outside the area.PSCAD/EMTDC software was used to build the simulation model of UHV hybrid cascaded DC transmission system,and the feasibility of the protection strategy was verified by Matlab.The simulation results show that when a fault occurs inside and outside the area,the protection prin-ciple can complete the fault identification within 3 ms,and the protection scheme is reliable and fast-moving.When different transition resistors are set in the area,the fault can still be accurate-ly identified,and the protection scheme has a strong ability to withstand the transition resist-ance.关键词
混合级联直流系统/余弦相似度/故障分量/输电线路保护/故障识别Key words
hybrid cascade DC system/cosine similarity/fault component/line protection/fail-ure recognition分类
信息技术与安全科学引用本文复制引用
任旭超,王业,杜云龙,崔玉..基于余弦相似度算法的混合级联直流输电线路保护新方案[J].西安工程大学学报,2024,38(2):26-33,8.基金项目
国网江苏省电力有限公司科技项目(J2022015) （J2022015）
国家自然科学基金资助项目(52107098) （52107098）
