现代电力2025，Vol.42Issue(2)：293-301,9.DOI:10.19725/j.cnki.1007-2322.2023.0009
基于高频阻抗方差的直驱风场送出线路纵联保护
A Pilot Protection Method for Transmission Lines of Direct-drive Wind Farms Based on High-frequency Impedance Variance
摘要
Abstract
To address the issue of difficult identification of transmission line faults at the delivery end of direct-drive wind power via DC delivery system,a pilot protection method for direct-drive wind farm transmission line is proposed based on high-frequency impedance variance.Under different conduc-tion conditions,the topologies of the wind farm side converter and DC side converter of the transmission line are analyzed in the first step.Considering the high-frequency characteristics of the system components,the single-mode high-frequency equi-valent models for both the wind farm and DC sides of the sys-tem are constructed.Base on the basis of model,the single-mode high-frequency fault add-on network of the wind power transmission system is constructed under in-zone and out-of-zone faults.The single-mode high-frequency impedance meas-ured by the protection on both sides of the line is derived.The protection criterion is established based on different fault scen-arios and single-mode high-frequency impedance matching characteristics.Finally,the simulation results based on RT-LAB platform confirm that the proposed method remains unaf-fected by the wind field control strategy and can discriminate faults both inside and outside the zone accurately.关键词
直驱风电/LCC-HVDC/送出线路/纵联保护Key words
direct-drive wind generator/LCC-HVDC/transmission line/pilot protection分类
信息技术与安全科学引用本文复制引用
郑斌,缪刚,韩昊,李鹏,马瑞辰,马静..基于高频阻抗方差的直驱风场送出线路纵联保护[J].现代电力,2025,42(2):293-301,9.基金项目
国网新疆电力有限公司重点科技项目(SGXJWL00CBJS2200564).Key Scientific and Technological Projects of State Grid Xinjiang Electric Power Co.,Ltd.(SGXJWL00CBJS2200564). （SGXJWL00CBJS2200564）
