不同线路模型对孤网发电机自励磁判据的影响  

Line Model Impacts on Self-Excitation Criteria of Isolated Network Generators

作　　者：张国松[1] 刘俊勇[1] 贺星棋[1] 郭晓鸣[1] 邓继宇[1] 

机构地区：[1]四川大学电气信息学院,成都610065

出　　处：《华东电力》2011年第5期716-719,共4页East China Electric Power

基　　金：国家自然科学基金项目(50977059)~~

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。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.

关 键 词：孤网 线路感抗 自励磁 线路模型 

分 类 号：TM726[电气工程—电力系统及自动化]