电网技术Issue(5)：1420-1424,5.DOI:10.13335/j.1000-3673.pst.2014.05.046
影响风电场联络线距离保护的因素及解决措施
Factors Impacting Distance Protection for Tie Line of Wind Farm and Corresponding Countermeasures
摘要
Abstract
Based on operation characteristic of wind farms, the acting characteristic of impedance circle of wind farm tie line is analyzed and the existing defect of traditional distance protection adopted for wind farm tie line is researched. A mathematical model of measured impedance of wind farm tie line is built and the impact of operational parameters on the measured impedance is researched. Frequency spectrum characteristics of post-fault currents and voltages at both sides of the tie line as well as their impacts on distance protection are simulated. A scheme to protect the tie line by adaptive distance protection is proposed. A simulation model of grid-connection of wind farm is constructed by PSCAD and the acting characteristic of traditional distance protection and that of adaptive distance protection during fault are compared, and simulation results show that the defect of traditional distance protection can be avoided by adopting adaptive distance protection to wind farm tie line, besides, the adaptive distance protection can suit to various operational model of wind farms and it can eliminate the impacts of non-power frequency current and voltage on the protection.关键词
风电场/风电场联络线/自适应距离保护Key words
wind farm/wind farm tie line/adaptive distance protection分类
信息技术与安全科学引用本文复制引用
王婷,李凤婷,何世恩..影响风电场联络线距离保护的因素及解决措施[J].电网技术,2014,(5):1420-1424,5.基金项目
国家自然科学基金项目(51267019，50967004)；国家电网公司科技项目(52272713039Y)。Project Supported by National Natural Science Foundation of China(NSFC)(51267019，50967004) （51267019，50967004）
Project Supported by Science and Technology Project of the China State Grid Corp(52272713039Y) （52272713039Y）
