定子双绕组感应电机风力发电系统的低电压穿越特性分析  

Characteristics Analysis on Low Voltage Ride Through of Dual Stator-winding Induction Generator Wind Power System

作　　者：施凯[1,2] 黄文新[1] 胡育文[1] 卜飞飞[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室,南京航空航天大学,江苏省南京市210016 [2]江苏大学电气信息工程学院,江苏省镇江市212013

出　　处：《电力系统自动化》2012年第17期28-33,共6页Automation of Electric Power Systems

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA05Z411)~~

摘　　要：通过发电机控制绕组侧的励磁变换器灵活调节系统所需的励磁无功功率,定子双绕组感应电机(DWIG)风力发电系统可在宽风速范围内输出稳定的高压直流,无需增加升压变换器即可并网运行,并且系统的控制策略有助于提高系统对电压跌落等故障的穿越能力。文中通过构建并网型DWIG风力发电系统的Simulink仿真模型,对系统运行在各种功率因数状态下的跌落特性及跌落期间对电网的无功功率支持进行全面仿真。结果证明,无需增加额外的卸载单元,DWIG风力发电系统即可实现较强的低电压穿越能力,在不同功率因数下均能稳定安全运行,且能在电压跌落故障期间提供一定的无功功率支持。A dual stator-winding induction generator（DWIG） wind power system outputs high DC voltage over a wide range of wind speed,relying on the adjustable reactive power by the static excitation converter（SEC） on the control-winding side.DWIG wind power systems export power into the electricity grid without a boost converter.The special control strategy on the generator side helps to improve the capability of low voltage ride through（LVRT） during a voltage sag period.A model based on Simulink is built to simulate the wind turbine＇s performance during voltage dips with a unity,a leading and a lagging power factor respectively.The reactive power support to the main electricity grid during voltage dips is also discussed.Simulation results indicate a satisfactory LVRT capability of DWIG wind power system,reactive power support with various power factors during voltage dips.

关 键 词：定子双绕组感应电机(DWIG) 风力发电系统 电压跌落 低电压穿越 无功补偿 

分 类 号：TM614[电气工程—电力系统及自动化]