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Study on De-excitation Simulation of No-load Water Wheel Generator
Author(s): 
Pages: 40-44
Year: Issue:  3
Journal: HYDROPOWER AUTOMATION AND DAM MONITORING

Keyword:  水轮发电机非线性电阻灭磁MATLAB仿真;
Abstract: 对水轮发电机空载误强励时磁场灭磁进行了仿真计算.针对用线性电阻、非线性电阻(包括氧化锌和碳化硅)灭磁,建立了不同的数学模型,并考虑了发电机空载特性的非线性,将空载特性用分析表达式近似表示,最后利用了MATLAB的Simulink工具.通过对三峡700 MW水轮发电机的实例仿真,得出了灭磁过程中励磁电压、励磁电流的变化曲线,以及非线性电阻在灭磁过程中吸收的磁场能量和灭磁时间,并对比了在相同灭磁反压下用线性灭磁电阻的灭磁效果,为在已知发电机有关参数下设计和选取非线性灭磁电阻提供了依据.
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