励磁系统故障仍是发电机组电气故障的主要原因。
Excitation system faults are main causes of generator electrical emergency.
本文所作的研究工作，为研究异步化汽轮发电机在励磁系统故障下的运行提供了一定的理论参考依据。
The results in this thesis will be helpful to analyze the operation for ASTG when some faults occur in the excitation system.
本文论述了励磁控制系统应满足发电机各种运行方式的要求，如负载运行、空载运行、系统故障等不同情况。
The performances of excitation control system must fit all the different operation conditions of generator, such as no load operation, loading, load rejection and different kinds of faults.
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