风力发电及其控制技术新进展

New Development of Wind Energy Generation and Control Strategy

综述了风力发电技术态势,即单机容量大型化、海上风机、定桨矩向变桨、变速恒频、无齿轮箱(直驱式)、结构设计发展,以及风电场远程监控及无线网络技术应用;论述了风力发电系统结构,如定速、变速风力发电系统原理及特点;列举了机组状态监测系统、测量参数,以及系统构成及实施功能;介绍了风电机组功率控制策略,以及变桨距控制、偏航控制、发电机控制原理及技术特点;提出了风电机组低电压穿越技术措施,如转子旁路保护电路、转子旁路加定子侧电力电子开关的组合电路、改进变换器控制算法、定子侧有源保护电路等;最后,针对多端电压源换流器高压直流输电用于风电场并网,分析结果表明双馈风电机组等效模型能正常稳定工作,在逆变侧发生故障时能较快恢复,且控制效果明显。

The development of wind energy generation, for example, larger rated power, offshore wind turbine generator system, VSCF, no gear-box driven, and construction design, remote wireless network wind farm monitoring system, was reviewed. The construction and theory of wind energy generation system, state monitoring system, testing parameters, system function were introduced. The power control strategies, such as pitch control, yaw control and generator control, were discussed, and LVRT was proposed. Analysis results show that MVSC-HVDC should be applied in the wind farm, because of its quick response and efficient control result.