计算机失磁保护的研究  

MICROPROCESSOR BASED PROTECTION OF LOSSOF EXCITATION

作　　者：陈棣湘[1] 罗飞路[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,长沙410073

出　　处：《电力系统自动化》2000年第16期58-61,共4页Automation of Electric Power Systems

摘　　要：根据失磁过程机端电压特性和励磁电压变化特性 ,提出了一种综合的、较为完备的计算机失磁保护方案。本方案综合运用了失磁保护中几种常用的主判据 ,对传统的静稳极限阻抗圆动作特性进行了改进 ,并突出了转子判据的作用 ,从而提高了失磁保护的可靠性。根据该方案设计的计算机失磁保护装置已成功地应用于华中电力系统。According to the impedance characteristics of the generator and the characteristics of the change of excitation voltage,a relatively self- contained and integrated schem e is proposed.The scheme synthetically applies several criteria about the protection of loss of excitation,improves the traditional working characteristics of static limit impedance circle,and emphasizes the action of rotator,which contributes to the reliability of loss of excitation protection. The loss of excitation protection facility based on this schem e has been m anufactured and successfully applied to Center China Electric Power System .

关 键 词：失磁保护 发电机 励磁电压 计算机 电气故障 

分 类 号：TM77[电气工程—电力系统及自动化]