基于坐标变换锁相环的动车组辅助逆变电源并网控制  

Grid-Connected Auxiliary Inverter Control of EMU Based on Coordinate Transformation Phase-Locked Loop

作　　者：李伟[1] 张黎[1] 赵震[1] 马驰[1] 

机构地区：[1]中国铁道科学研究院机车车辆研究所,北京100081

出　　处：《中国铁道科学》2011年第5期100-103,共4页China Railway Science

基　　金：国家科技支撑计划(2009BAG12A05)

摘　　要：针对辅助逆变电源在并网过程中输出电压相位的控制,提出基于坐标变换锁相环的相位检测方法,对辅助逆变电源和供电网络的电压频率及相位进行检测;根据检测得到的二者电压相位差对辅助逆变电源输出电压的相位进行调节,以保证辅助逆变电源输出电压的相位与供电网络的相位相同。通过仿真验证提出的相位检测方法和相位控制方法。结果表明:提出的相位检测方法和相位控制方法能快速、准确地检测出辅助逆变电源输出电压和电网电压的相位,并能对辅助逆变电源输出电压的相位进行控制,使两者相位一致;与无电压相位控制相比,能有效消除辅助逆变电源并网过程中出现的电压和电流冲击,确保辅助逆变电源安全、可靠工作。In view of the phase control for output voltage of auxiliary inverter in grid-connected process,rotating coordinate transformation is used to detect phase,so that the phase and frequency of auxiliary power supply and power supply grid can be obtained.Phases of auxiliary power supply and power supply grid are detected synchronously,and according to phase difference obtained,the output voltage phase of auxiliary inverter can be adjusted to guarantee in-phase between inverter output and power supply grid.The inverter grid-connected control is modeled according to the presented method.From simulation results,it can be seen that phases of auxiliary power supply and power supply grid can be detected quickly and exactly,and the phase of auxiliary power supply can be controlled to guarantee in-phase.Compared with no phase control,the method presented can avoid the surge of voltage and current in grid-connected process,and ensure auxiliary power supply to operate safely and reliably.

关 键 词：辅助逆变电源 并联供电 输出电压 相位控制 锁相环 

分 类 号：U270.381[机械工程—车辆工程]