电网技术2017，Vol.41Issue(5)：1668-1673,6.DOI:10.13335/j.1000-3673.pst.2016.1923
基于电压相量的直驱风电场联络线相自适应接地距离保护
Single-Phase Adaptive Grounding Distance Protection for Tie Line of PMSG Wind Farm Based on Voltage Phasors
摘要
Abstract
In allusion to mal-operation or miss operation problems of single-phase grounding distance protection for wind farm tie line caused by transition resistance bringing about inaccurate impedance measurement,voltage vector plane characteristics of double-supply systems are analyzed.Based on sequence current relationship of fault point and relay installation location,combined with wind farm side's zero sequence impedance characteristics,relationship expressions of measured voltage and fault point voltage are set up.According to phase angle characteristics of fault point voltage and setting voltage,a novel single-phase adaptive grounding distance protection scheme for tie line of PMSG wind farm,considering frequency deviation characteristics of DFIG,is put forward.Its operating performance is validated with simulations.Simulation results show that the proposed scheme is simple,reliable and immune to transition resistance.Besides,it is not affected by various operation conditions of wind farm,and can discriminate internal and external fault correctly.关键词
直驱风电场联络线/自适应距离保护/过渡电阻/测量电压、电流/频率偏移/故障点电压/整定电压Key words
tie line of PMSG wind farm/adaptive distance protection/transition resistance/measured voltage and current/frequency deviation/fault voltage/setting voltage分类
信息技术与安全科学引用本文复制引用
王月林,李凤婷,路亮,徐晓宾..基于电压相量的直驱风电场联络线相自适应接地距离保护[J].电网技术,2017,41(5):1668-1673,6.基金项目
国家自然科学基金资助项目(51267019,51467019).Project Supported by National Natural Science Foundation of China(51267019,51467019). （51267019,51467019）
