同相牵引供电系统控制策略研究及仿真分析  

Control strategy of co-phase traction power supply system and simulative analysis

作　　者：黄小红[1] 李群湛[1] 杨乃琪[1] 舒泽亮[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电力自动化设备》2014年第1期43-47,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51177139)~~

摘　　要：针对电气化铁道的谐波、无功、负序及电分相等问题,讨论了采用Scott平衡变压器与综合潮流控制器(IPFC)构成的同相供电系统。提出IPFC直流侧电压PI均值前馈控制策略,可准确控制变压器副边电流幅值均衡,实现系统负序的完全补偿。为改善传统控制方法谐波含量高、直流侧电压波动大的不足,提出直流侧电流均值前馈控制策略。所提方法使系统具有良好的动态特性、稳定性及较小的稳态误差,且在牵引和再生制动工况下均适用。仿真分析验证了所提方法的有效性与正确性。Aiming at the problems in the negative sequence,harmonics,reactive power and electrical separation of electric railroad,the co-phase traction power supply system composed of Scott transformer and IPFC （Integrated Power Flow Controller） is discussed. ,A scheme of PI-mean feedforward control at IPFC DC voltage side is presented to properly control the amplitude equilibrium of transformer secondary current for the complete compensation of system negative sequence. A scheme of DC current-mean feedforward control is also given to suppress the harmonic content and smooth the DC voltage. The proposed control strategy has better dynamic performance and stability,as well as smaller steady-state error,suitable for both traction and regenerative braking conditions. Simulative results verify its correctness and effectiveness.

关 键 词：同相牵引供电系统 综合潮流控制器 滞环比较控制 前馈控制 PI均值前馈控制 电流均值 再生制动 补偿 电气化铁道 

分 类 号：TM922.3[电气工程—电力电子与电力传动] U224[交通运输工程—道路与铁道工程]