牵引网电分相的联合建模与潜在过电压抑制研究  

Traction Power Network Sectioning United Modeling and Uppression of Potential Over-voltage

作　　者：屈志坚[1] 刘雨欣[1] 郭亮[1] 

机构地区：[1]华东交通大学电气工程学院,南昌330013

出　　处：《高压电器》2014年第6期26-31,共6页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51007023);博士科研启动基金资助(09122014);江西省教育厅科技项目(GJJ13350)~~

摘　　要：针对电力机车通过关节式电分相造成车顶绝缘被击穿的问题,通过潜在电路模型的构建,提出了一种电分相过电压的抑制方法。建立了锚段关节式电分相的链式电路模型,分析了机车通过电分相过渡的暂态过程,探讨了平衡接线和AT供电对潜在过电压的影响,利用机车-电分相-牵引网联合仿真模型,进行感应电压和过电压仿真实验。结果表明:中性线加装抑制电路,可使过电压最大值由108.0 kV降为64.8 kV,减小了过电压对牵引网和机车的绝缘冲击作用。A suppression method of electrical sectioning over-voltage is proposed by constructing a potential circuit model because the over-voltage causes insulation breakdown when an electric locomotive goes through articulated electrical sectioning. A chain-type equivalent circuit model of electrical sectioning structure is established, the transition process of a locomotive going through electrical phase is analyzed,and the balance wiring and the influence of AT power supply on potential over-voltage are discussed. The induction voltage and the over-voltage are simulated by using the united simulation model of locomotive-electrical traction-network. The results show that installing a suppression circuit on electrical sectioning neutral wires can reduce the maximum over-voltage from 108.0 kV to 64.8 kV to weaken the impact of over-voltage on the insulation of traction power network and locomotives.

关 键 词：潜电路 过电压 电分相 斯科特 AT供电 

分 类 号：TM862[电气工程—高电压与绝缘技术]