非理想电网条件下双馈式风电机组的运行控制策略  

Operation Control Strategy of DFIG Wind Turbine under Non-Ideal Grid Conditions

作　　者：胡书举[1,2] 孟岩峰[1,2] 龚文明[1,2] 王玲玲[1,2] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院风能利用重点实验室,北京100190

出　　处：《电工技术学报》2013年第5期99-104,共6页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA050204)

摘　　要：随着风电在电网中比例的增大,双馈式风电机组必须更好地适应电网中可能出现的非理想状况,例如谐波、电压跌落等。针对电网电压谐波问题,在转子侧变流器中采用PI+谐振控制器,抑制定子输出电流的低次谐波含量。针对低电压穿越问题,分析了电压跌落时的暂态过程及转子Crowbar电阻的影响,对转子Crowbar电阻的参数进行校核修正,并对Crowbar电路的投切控制进行优化。在接入某电力系统动模实验室的双馈式风电模拟系统上进行了实验,验证了所提控制策略的有效性。The proportion of wind power in power grid is increasing,then DFIG wind turbine is necessary to accommodate some non-ideal conditions of grid,such as harmonics,voltage sag.For grid voltage harmonics,a PI ＋ resonant controller is developed to restrain the low-order harmonic components in stator current.For low voltage ride trough（LVRT） capability,the transient process during voltage sags and the influence of Crowbar resistor are analyzed,then the Crowbar resistor value is corrected,and the switch control method of Crowbar circuit is improved.The validity of the proposed control strategies is verified by a DFIG wind turbine simulation system integrated in a power system laboratory of dynamic simulation.

关 键 词：非理想电网条件 双馈式风电机组 低次谐波 谐振控制器 低电压穿越 

分 类 号：TM315[电气工程—电机]