摘要
在介绍了发电机失磁保护异步圆阻抗判据和发电机稳定极限导纳判据的原理后,通过将异步圆阻抗方程坐标变换到导纳复数平面后,将典型X_d和X_d'值代入进行标幺值计算,在同一坐标系下,直接分析和比较这两种失磁保护主判据,并指出在失磁刚开始发生阶段,基于发电机稳定极限导纳判据的失磁保护能更快地检测到这一情况,同时还指出在某些系统条件下,基于发电机稳定极限导纳判据的失磁保护相较于阻抗判据具有更高的可靠性。
After introducing the principles of the field loss asynchronous circle impedance criterion and the stability limit admittancecriterion of the generator, the typicalandX values were substituted into thtion for the per unitary value calculation, by transforming the coordinates of the asynchronous circle impedance equation to the admittance complex plane. In the same coordinate system,the two main protection were directly analyzed and compared,and it was indicated that the stability limit admittance criterion of the generator can detect the situation more quickly at the beginning stage of the filed loss. Meanwhile,it was also indicated that under certain system conditions,the stability limit admittance criterion of the more reliable than that asynchronous circle impedance criterion.
出处
《电力科技与环保》
2018年第4期52-55,共4页
Electric Power Technology and Environmental Protection
基金
国家重点研发计划项目(2017YFC0210200)
关键词
隐极发电机
失磁保护
异步圆阻抗判据
发电机静稳导纳判据
坐标转换
non salient pole generator
filed loss protection
asynchronous circle impedance criterion
generator stability limit admittance equation
coordinate transformation
