AT供电系统同相供电PR控制器设计

Design of PR regulator for co-phase AT-feeding traction power system

提出AT供电系统的基于PR控制器的同相供电设计方案。该方案采用Scott变压器以降低变压器和背靠背H型变流器的容量,选择了自适应EPLL以提高锁相环的响应速度,基于PR控制器设计了H型变流器的控制系统。充分考虑了由开关频率引起的H型变流器的时间延迟,并基于Naslin多项式设计了PR控制器参数。仿真结果证明,所提方案能达到无功和负序补偿要求,抗负荷扰动的能力较强,谐波补偿能力非常小,适合于运行交-直-交动车组的牵引供电系统。

A co-phase power supply scheme based on PR （Proportional-Resonant） regulator is proposed for AT-feeding traction power supply system,which adopts Scott transformer to reduce the capacities of transformer and back-to-back H-type converters and utilizes adaptive EPLL（Enhanced Phase Locked Loop） to enhance its response.The control system of H-type converters is designed based on PR regulator,which fully considers the time delay of converters caused by the switching frequency.The parameters of PR regulator are tuned based on Naslin polynomial technique.The simulative results show that,the reactive and negative currents are compensated as required and the capability against load disturbance is enhanced.Because of its insufficient capability in harmonic compensation,the proposed scheme is suitable for the traction power supply systems with AC/DC/AC electric vehicles.