采样值差动及其应用

以采样值差动为研究对象，从综述的角度运用数学方法详细地分析了采样值差动的动作判据，判别数据窗的确定以及模糊区等具体问题，以期对采样值差动的理论基础做出总结。同时，在此基础上列举了运用采样值差动抗电流互感器（TA）饱和、鉴别励磁涌流以及与故障分量相结合等特殊应用实例，以说明采样值差动与常规相量差动相比较的优势所在。文中同时给出了一些仿真与动模实验的结果。

NEW DIFFERENTIAL PROTECTION OF POWER APPARATUS BASED ON SAMPLED VALUES AND ITS APPLICATION

This paper studies the differential protection of power apparatus by using the discrete sampled values instead of thephasors in conventional methods. The operating criteria, required length of data window and fuzzy operating region areanalyzed in detail. The abilities of anti-saturation of current transformer and discrimination of magnetizing inrush currentthrough the test of the prototype device on power system physical model show that its operational performance is superior tothose based on conventional methods.