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中文摘要：
对水电机组孤网运行方式下,发电机带空载长线路可能出现的自励磁现象进行了研究。分析了发电机自励磁的物理过程和线路感抗的不同处理方式对自励磁判据的影响,给出不同的线路模型在进行自励磁判据时的适用情况,为能更加简单、准确地对水电机组孤网运行产生自励磁判据提供了理论依据。通过PSCAD/EMTDC仿真和实验结果证明了所得结论的正确性。
英文摘要：
The research has been made on self-excitation phenomena possible for no-load generator with a long line when hydroelectric generating units operate in the isolated network mode.Then this paper analyzes the physical process of self-excitation generator,as well as the impacts on self-excitation criteria produced by different approaches to deal with line inductive reactance.Application conditions of using self-excitation criteria for different line models are defined in order to present theoretically the simple and accurate self-excitation criteria for isolated hydroelectric generating units operation.Finally,PSCAD/EMTDC simulation test verifies the correctness of the conclusion.
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