双馈风电机组高电压穿越控制策略与试验  

Control Strategy and Experiment of High Voltage Ride Through for DFIG-based Wind Turbines

作　　者：李少林[1] 王伟胜[1] 王瑞明[1] 孙勇[1] 陈晨[1] 

机构地区：[1]新能源与储能运行控制国家重点实验室(中国电力科学研究院),北京市100192

出　　处：《电力系统自动化》2016年第16期76-82,共7页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2012CB215105);国家电网公司科技项目(NY71-12-014)~~

摘　　要：针对风电的高电压脱网问题,介绍了主要风电并网导则对高电压穿越的要求,对比分析了双馈风电机组低电压和高电压的电磁暂态特性,论证了双馈风电机组1.3倍额定电压的高电压穿越过程全程可控的可行性。提出了一种基于双馈变流器动态无功控制的高电压穿越控制策略和风电机组主控系统与变流器协同控制完成高电压穿越的实现方法,避免了Crowbar或Chopper保护动作对高电压穿越特性的不利影响。在MATLAB/Simulink中建立了2 MW双馈风电机组高电压穿越仿真模型,实现了高电压穿越全过程仿真;利用高电压发生装置,在2 MW双馈风电机组上进行了高电压穿越现场试验,试验结果表明了理论与仿真分析的准确性及控制策略的有效性。In research of frequent tripping of wind turbines under high voltage conditions , the requirements for high voltage ride through （ HVRT） of the main grid integration guide to wind power are introduced . A comparative analysis of electromagnetic transient characteristics of doubly‐fed induction generator （DFIG） based wind turbines is carried out under dip and voltage swell conditions , and the full control of the DFIG‐based wind turbines HVRT process is demonstrated if the voltage is less than 1 .3 nominal voltage . Then , a collaborative HVRT control strategy for DFIG‐based wind turbines based on main controller and the convertor is proposed , which is implemented just by software improvement without hardware modification , and avoids the adverse effect of Crowbar or Chopper protection action on the characteristics of HVRT . A 2 MW DFIG‐based wind turbines model for HVRT research is built in MATLAB/Simulink , and the HVRT process of DFIG‐based wind turbines is simulated . The field test is carried out on a 2 MW DFIG‐based wind turbines by high voltage generator for the first time . The simulation and experimental results support the theoretical analysis and verifies the effectiveness of the proposed control strategy .

关 键 词：风电机组 电压骤升 高电压穿越 协同控制 现场试验 

分 类 号：TM614[电气工程—电力系统及自动化] TM315