电工技术学报2017，Vol.32Issue(22)：216-224,9.DOI:10.19595/j.cnki.1000-6753.tces.160823
低电压穿越控制下双馈风电机组短路电流特性与计算方法
Characteristics and Calculation Method of Short-Circuit Current of Doubly Fed Wind Generator under Lower Voltage Ride Through
摘要
Abstract
The fault characteristics of power system is being changed by the large-scale application of doubly fed induction generator (DFIG) in wind generation. Thus, the relay protection of power system is restricted. Many researches on fault characteristics of DFIG have been conducted, but the influence of low voltage ride through (LVRT) was excluded. This paper studies the short-circuit current contributed by DFIG under LVRT control, with the emphasis on the effects of reactive power on terminal voltage. The coupling mechanism between the winding reaction and LVRT control is taken into account. The expressions of short-circuit currents before and after the LVRT control were presented by constructing the vector model of DFIG operated with LVRT control. The influence on short-circuit caused by the reactive power and its trigger time under LVRT control was analyzed. The equivalent models of DFIG before and after LVRT control were then built. Finally, the calculation method of short-circuit current of a doubly-fed wind power system was proposed.关键词
风力发电/双馈风力发电机组/短路电流/故障分析/低电压穿越Key words
Wind generation/doubly fed induction generator (DFIG)/short-circuit current/fault analysis/lower voltage ride through (LVRT)分类
信息技术与安全科学引用本文复制引用
欧阳金鑫,唐挺,郑迪,任文君,熊小伏,钟家勇..低电压穿越控制下双馈风电机组短路电流特性与计算方法[J].电工技术学报,2017,32(22):216-224,9.基金项目
国家自然科学基金(51407017)、重庆市基础与前沿研究计划(cstc2015jcyjA90016)和中央高校基本科研业务费专项资金(106112015CDJXY150001)资助项目. （51407017）
