交流电机变速恒频风力发电技术

Technology of Variable-speed Constant Frequency Wind Generating Used AC Machine

变速恒频风力发电系统是20世纪70年代中后期逐渐发展起来的一种新型发电系统,其结构和运行原理与传统的恒速恒频风力发电机有较大的不同。在该系统中,风力机可在很宽的风速范围内保持近乎恒定的最佳的叶尖速比,从而提高了风力机的运行效率和系统的稳定性。此外,还可以实现无电流冲击的软并网。变速恒频风力发电技术因其高效性和实用性正受到越来越多的重视。以交流电机为基础,详细地介绍了目前国内外采用交流电机的变速恒频风力发电系统的研究现状,并对各系统的性能进行了对比、分析总结。

There has been a new wind generating system called variable speed constant frequency（VSCF） system which is much more diffirent from the constant speed constant frequency（CSCF） wind generating system in structures and principles since 1970s. In the VSCF system, the tip-speed ratio of wind turbine is almost retained at a constant value during a wide range of wind speed, which can improve the efficiency and stabilizationf of the system. It also can be connected to the grid without any voltaic strike. The VSCF wind generating system becomes more and more important because of its high efficency and practicability. The paper presents the technology of variable speed constant frequency wind generating system in recent yeas used ac machine and the per- formances of each generating system.