电工技术学报2018，Vol.33Issue(6)：1197-1207,11.DOI:10.19595/j.cnki.1000-6753.tces.170955
双馈风电系统中VRB储能型网侧九开关变换器
Grid Side Nine-Switch Converter Based on VRB Energy Storage for Doubly-Fed Induction Generator Wind Turbine System
摘要
Abstract
Stator side of doubly-fed induction generator (DFIG) wind generation system connects to grid directly, which makes the fault ride through especially important. On the basis of studying a variety of fault voltage compensation schemes and pulse width modulation strategies of nine-switch converter, a novel nine-switch converter is proposed to replace the grid side converter of DFIG system for grid connection control and voltage series compensation. This paper analyzes the mathematical model, modulation strategy, working state and control strategy of grid side nine switch converter, as well as the DC bus voltage distribution and vanadium redox flow battery energy storage circuit model. Then, the simulation model of DFIG system that replaces grid side converter with nine-switch converter is established. A variety of PCC voltage short circuit fault conditions were designed, and the electrical parameters and operating characteristics of the wind generation system were studied. The results show that the nine-switch converter can maintain the voltage stability of the DFIG and realize flexible fault ride through of the double-fed wind turbine under symmetrical and asymmetrical grid voltage faults.关键词
九开关变换器/双馈感应电机/全钒液流电池/电压补偿/控制策略/风力发电Key words
Nine-switch converter (NSC)/doubly-fed induction generation/vanadium redox flow battery/voltage compensation/control strategy/wind power generation分类
信息技术与安全科学引用本文复制引用
廉茂航,任永峰,韩鹏,任宇,胡志帅..双馈风电系统中VRB储能型网侧九开关变换器[J].电工技术学报,2018,33(6):1197-1207,11.基金项目
国家自然科学基金(51567020、51367012),内蒙古自然科学基金(2015MS0532、2011BS0903)和内蒙古自治区"草原英才"工程(CYYC2013031)资助项目. （51567020、51367012）
