电力系统保护与控制Issue(18)：78-82,5.
电流互感器饱和对低压电动机保护的影响及对策
Influences and countermeasures for saturation of current transformers on low voltage motors protections
于梦瑶 1于群 1史建省 1张智宇 1王文涛1
作者信息
- 1. 山东科技大学电气与自动化工程学院，山东 青岛 266590
- 折叠
摘要
Abstract
At present motor integrated protection device is widely used in industrial production. However, when stator winding short-circuit current is too large, it is easy to lead to the current transformer in saturation state thus cause the malfunction of the motor integrated protection device, because of the improper selection of parameters of current transformer. Therefore, by using the PSCAD/EMTDC software and simulation analyzing the performance of the current transformer for protection and miniature current transformer of motor integrated protection device after the low voltage motor stator winding fault, this paper puts forward to add the three sampling algorithm in motor protection device protection algorithm. Meanwhile, it takes advantage of MATLAB/Simulink’s simulation to verify the proposed measure. Besides, this measure overcomes the disadvantage of motor integrated protection device’s unreliable action as the main protection in the saturation of the current transformer, which is caused by the long sampling time of Fourier’s algorithm. So it could improve the safety and reliability of the low voltage motor protection device’s operation.关键词
电力系统/电动机/电动机综合保护装置/电流互感器/饱和特性Key words
electric power system/motor/motor integrated protection device/current transformer/saturation characteristic分类
信息技术与安全科学引用本文复制引用
于梦瑶,于群,史建省,张智宇,王文涛..电流互感器饱和对低压电动机保护的影响及对策[J].电力系统保护与控制,2014,(18):78-82,5.
