Measures, such as the floating of threshold, braking by positivesequencecurrent, driving up the threshold during power swing, etc are suggested to prevent th.
采用浮动门槛、正序电流制动和静稳破坏后提高动作门槛值的方法,来防止系统振荡时误启动。
2
Based on the symmetry component theory, a method of the motor protection is presented by measuring positive, negative and zero sequencecurrent component.
基于对称分量法理论,提出了基于检测正序、负序、零序电流分量的电动机保护方法。
3
The transformation of the instantaneous value symmetry component applied, the positivesequence space vector of fault component of the voltage and current can be derived.