微机型发电机自适应失磁保护的研究

分析了常规发电机失磁保护的静稳极限阻抗圆的判据所存在的缺点，提出一种利用微机自动检测联系电抗Ｘｓ的变化，自动修改静稳极限圆定值的自适应发电机失磁保护。

Research on Digital Adaptive Excitation Loss Protection

After the criterion defect of static steady circularity of impedance for general excitation loss protection is analyzed,a new adaptive excitation loss protection is discussed which is based on the change of contact reactance Xs,the fix value of protection can be automatically modified.