国产首台大型变频调速异步发电机的优越性

为保证发电机组始终处于最佳工况下运行，从而能够最大限度地提高工作效率和电力系统的稳定性，只要采用隐极式（圆筒形）转子交流励磁的异步发电机来取代凸极式转子直流励磁的同步发电机，并通过调节转子三相交流励磁电流的频率、幅值和相位来改变运行转速，就可以达到目的。如果采用现代化的矢量控制，还可以在调节有功和无功功率的同时，使发电机的控制达到快速响应，满足电网运行安全可靠性方面的要求。这种新型变速发电机既可以用于抽水蓄能发电站，也可以用在风力发电站。最近开发并已成功投入运行的这种机组填补了国内空白，强化了国内外市场帝争实力．

Superiority of the First Domestic Large Variable-Frequency Adjustable-Speed Asynchronous Generator

In order to ensure that the generator set is always operated in the best condition so as to maximize operational efficiency and stability of electric power system, two measures can be taken to meet the previous requirements, such as AC excitation asynchronous generator with non-salient pole （cylindrical） rotor is used to replace DC excitation synchronous generator with salient pole rotor, and the frequency, amplitude and phase of three-phase AC excitation rotor cur- rent are adjusted to change operational speed. If modem vector control technology is used, it can adjust active power and reactive power to make the control of generator achieve rapid response, thus meet the safe and reliable requirements of power network. This new variable-speed generator not only can be used in a pumped storage power station, but also can be used in a wind power station. This generator set, which had been developed and successfully put into operation by Har- bin Electric Machinery Co. , Ltd. , has recently filled domestic gap and strengthened the competi- tiveness in domestic and foreign markets.