摘要
根据电力机车过分相的典型运行状态,针对电磁感应、电阻分压和电容分压3种电压互感器建立等效电路模型,仿真分析电力机车过分相的暂态过程,特别是过电压产生的机理。分析结果表明,电容分压原理的电子式电压互感器可消除谐振过电压,有效减小操作过电压,最利于改善电力机车过分相的暂态过程,降低牵引网绝缘事故的发生。
Based on the typical manner of electric locomotive passing the neutral section, equivalent circuit model was established of the three kinds of voltage transformer according to electromagnetic induction, the resistance partial pressure and capacitance partial pressure. Transient process of electric locomotive passing the neutral section was simulated, especially the mechanism of overvoltage. The results showed that electronic voltage transformer based on capacitance partial pressure could eliminate resonant overvoltage, and reduce the operating overvoltage effectively. It is beneficial to improve transient process of electric locomotive passing the neutral section and reduce the traction network insulation accidents.
出处
《机车电传动》
北大核心
2015年第2期20-25,共6页
Electric Drive for Locomotives
基金
强电磁工程与新技术国家重点实验室基金项目(2013KF001)
关键词
电力机车
高电压互感器
容性测量装置
过分相
过电压
electrical locomotive
high-voltage transformer
capacitive measuring device
passing the neutral section
overvoltage
