电网电压跌落下双馈风力发电机组暂态性能的比较分析  

COMPARISON AND ANALYSIS OF TRANSIENT PERFORMACES FOR DOUBLY FED INDUCTION GENERATOR WIND TURBINE UNDER GRID VOLTAGE DIP

作　　者：李辉[1] 叶仁杰[1] 韩力[1] 王荷生[1] Chen Z 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]丹麦奥尔堡大学能源技术学院,奥尔堡DK9220

出　　处：《太阳能学报》2010年第6期775-781,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50607022);教育部留学回国人员启动基金(2008-890-2);重庆市自然基金项目(2008BB6038)

摘　　要：为了较全面地研究不同运行工况下并网双馈风力发电机组的暂态运行性能,该文基于双馈发电机电磁暂态模型,采用等效集中质量法,建立了考虑风力机和发电机之间传动轴扭转柔性的风力机两个质量块等效模型。在此基础上,基于定子电压定向的矢量控制策略,对风电机组在不同风力机输出转矩、不同电网电压跌落和不同故障持续时间下分别进行了暂态运行性能的仿真,并对风力机不同质量块等效模型的结果进行比较。结果表明,双馈风力发电机组暂态性能与风力机传动链柔性、电压跌落程度和故障持续时间等密切相关。In order to entirely analyze the transient performances of a grid-connected doubly fed induction generator (DFIG) wind turbine under the different operational states, based on the transient models of DFIG, a two-mass wind turbine electrical equivalent model considering the torsional flexibility of the drive-drain shaft between the wind turbine and generator, and a one-mass equivalent model were presented by using an equivalent lump mass method in this paper. Combined with the stator voltage oriented vector control strategies of DFIG, the transient behaviors of the DFIG wind turbine system were investigated at different initial output torques of wind turbine, different levels of grid voltage dip and different durative fault time, respectively. Simulation results were also compared with different equivalent models of the wind turbine drive train. The results show that the transient performances of DFIG wind turbine have a close relationship with the shaft flexibility of wind turbine drive train, grid voltage dip level and durative fault time.

关 键 词：电网 电压跌落 双馈发电机 风力发电机组 暂态性能 比较分析 DIP GRID WIND TURBINE DOUBLY FED INDUCTION GENERATOR ANALYSIS 风力机 运行性能 等效模型 持续时间 质量块 矢量控制策略 定子电压定向 电磁暂态模型 集中质量法 

分 类 号：TK511-55[动力工程及工程热物理—热能工程]