感应电机动态特性对电压骤降的影响.pdfVIP

感应电机动态特性对电压骤降的影响 王强，夏成军，张尧 （华南理工大学电力学院，广东 广州 510640） 摘要：论文首先基于不对称电压骤降推导了感应电机电磁和机械回路方程，然后结合电压骤降过程分析了感应电机动态特性 对电压骤降的影响，最后运用电磁暂态软件 PSCAD/EMTDC 建立模型仿真计算感应电机的动态特性对电压骤降波形、电压 骤降幅值和持续时间等特征参数的影响以及不对称和对称电压骤降对感应电机的母线电流、转速和电磁转矩等特性的影响。 仿真结果表明感应电机动态特性会造成电压骤降波形畸变和特征参数发生变化，且不对称和对称电压骤降对感应电机特性影 响是不同的。 关键词：电压骤降；感应电机；动态特性；建模；仿真 中国图书分类号：TM711 文献标识码：A 文章编号： The influence of induction motors’ dynamic responses on voltage sags WANG Qiang, XIA Cheng-jun , ZHANG Yao （South China University of Technology, Guangzhou 510640, China） ABSTRACT: This paper derive Electrical circuits and Mechanical circuit of induction motors based on with the process. Then it analyzes the influence of induction motors (IMs) on voltage sags combining with the process of voltage sags. The model simulate that Induction Motors’ dynamic response affects the shape and characteristic parameters of voltage sags and the bus current ,speed and mechanical torque characteristics of induction motors effect with respect to symmetrical and asymmetrical sags, which is implemented in the transient simulations of PSCAD/EMTDC package . The simulation relation results show that not only Induction Motors’ dynamic response affects the shape and characteristic parameters of voltage sags to change but also Induction Motors’ characteristics are different with respect to symmetrical and asymmetrical sags. KEY WORDS: Voltage sag ；Induction Motors ；Dynamic Responses ；Modeling ；Simulation 1 前言 速恢复到稳定状态，并产生涌流，从而阻碍电压的 快速恢复，电压骤降波形将经历一段衰减后才可能 随着新技术产业的不断出现，电能质量已成为 [3] 恢复 ，感应电机的母线电流、转速和电磁转矩等 供电部门和用户所关注的焦点。其中，电压骤降问 特性也将发生变化。由此可见感应电机动态特性与