Abstract：An analysis of differential protection misoperation in electrical motor start-up process suggests that a multitude of factors lead to gross saturation of the motor side current transformer in motor start-up and the distortion in secondary current gives rise to differential protection misoperation. To address current transformer saturation, several solutions were proposed having regard to the characteristics of motor differential protection and the current transformer. In consideration of the service power generation trend at present in power plants, it has been suggested that the service power current transformer parameters and secondary circuit design, among others, shall take into account the coordination with protection in order to forestall failure to trip or misoperation in protection.
石生旺. 电动机差动保护误动分析与改进措施[J]. 电气技术, 2017, 18(6): 136-139.
Shi Shengwang. Nalysis of Electrical Motor Differential Protection Misoperation and Its Improvement. Electrical Engineering, 2017, 18(6): 136-139.
2017, Vol. 18 
