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同相牵引供电系统控制策略研究及仿真分析
黄小红, 李群湛, 杨乃琪, 舒泽亮
西南交通大学 电气工程学院,四川 成都 610031
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。
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  电流均值前馈控制  再生制动  补偿  电气化铁道
DOI:
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基金项目:国家自然科学基金资助项目(51177139)
Control strategy of co-phase traction power supply system and simulative analysis
HUANG Xiaohong, LI Qunzhan, YANG Naiqi, SHU Zeliang
School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China
Abstract:
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.
Key words:  co-phase traction power supply system  integrated power flow controller  hysteresis comparison control  feedforward control  PI-mean feedforward control  current-mean feedforward control  regenerative braking  compensation  electric railroads

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