基于并网型双馈感应发电机的风电场暂态稳定性研究  

Study on Transient Stability of Grid-connected Wind Farm with Doubly Fed Induction Generator

作　　者：蔡彦涛[1] 杨俊华[1] 杨梦丽[2] 汤琼[1] 吴捷[3] 

机构地区：[1]广东工业大学自动化学院,广东广州510006 [2]信阳供电公司,河南信阳464000 [3]华南理工大学电力学院,广东广州510641

出　　处：《陕西电力》2011年第6期6-11,共6页Shanxi Electric Power

基　　金：国家自然科学基金重点项目(60534040);广东省教育厅专项重点实验室项目(IDSYS200701);广东省科技计划项目(2009B010900052)。

摘　　要：为保障在电网故障或高风速工况下含风电场电力系统仍能稳定运行,提出了一种通过增加桨距角控制来改善并网风电场暂态稳定性的方法,通过调节风轮与风向的夹角,降低风力机的输出功率。研究了基于大规模双馈感应发电机的风电场暂态稳定性。在Matlab/Simulink平台中搭建了具有支撑风电场暂态稳定性的桨距角控制模型和双馈风电机组的风电场模型,通过对包含风电场的电力系统仿真,验证了桨距角控制对风电场暂态稳定性的贡献。仿真结果表明:桨距角控制能够有效降低高风速下风电机组的机械转矩,提高了风电场实现低电压穿越的能力,确保风电机组持续运行及电网安全稳定。A strategy which is used to improve transient stability of wind farm is proposed to ensure power system operation in safe and stable mode under power grid failure or high wind conditions.This method is realized by adding the pitch angle control after wind farm is connected.Adjust the angle between wind turbine and wind direction to reduce output power.The transient stability of wind farm based on large-scale double-fed generator is studied.Pitch angle control model which is applied to support wind farm transient stability is set up and power system model with double-fed wind turbine is built in the MATLAB/Simulink software,the contribution to the transient stability is verified by power system simulation containing a large wind farm.The simulation results indicate that the pitch angle control can effectively reduce the wind turbine mechanical torque under high wind speed,the low voltage ride through （LVRT） capability is improved,ensures the continuous operation of wind turbines and the security and stability of power network.

关 键 词：风力发电 双馈感应发电机 风电场 暂态稳定性 桨距角控制 

分 类 号：TM301.2[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]