文中特别介绍了发电机保护和低频低压解列技术的应用。

Specially, generator protection, under-voltage protection and frequency protection are introduced in this paper.

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同步发电机整流带反电动势负载时，当系统参数不匹配，在一定工况下，可能出现低频振荡。

For some operating conditions, a synchronous generator with a rectifier and back-EMF load maybe exhibit low-frequency oscillations when the system parameters do not match.

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针对近年来电力系统低频振荡中出现的非线性奇异现象，阐述了发生这种现象的机理，并在文献1的基础上，把发电机的模型扩展到四阶。

For the nonlinear singularity phenomenon of power system, it is stated the mechanism of phenomenon. On the basis of references 1, the generator model is expanded to four dimensions.

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