摘要
谐振式无线输电(WPT)系统通过耦合磁场传递能量,能实现电器无尾化,可免去插拔电源造成的机械损坏和触电危险,安全便捷。双向WPT系统能实现电网与设备间的能量互联,起到削峰填谷的作用。在WPT系统中,相位控制不仅能调节功率大小,而且决定了功率流动方向。分析并验证了WPT系统中功率与多个移相角的关系。首先,建立并分析了谐振式WPT系统的电路模型,发现系统存在3个自由度,然后推导并定量分析了有功功率和无功功率与3个移相角的关系,最后提出在确保零相位角(ZPA)下的双向WPT策略。在Matlab中搭建了仿真模型并制作了实验样机,对上述分析进行了验证。
Resonant wireless power transfer （WPT） system delivers power through coupling magnetic field.It contributes to eliminate the charging lines and provides safety and convenience for human beings.Bidirectional WPT system connects the grid and the devices can be applied for load shifting.In WPT systems, phase shifting angles regulates the power and determines power flow direction.The relationships between the power and multiple phase shifting angles is proposed.Firstly,the circuit model of the proposed WPT system is built up.It is found that there exist three independent phase shifting angles in this system.Then, the expressions of active power and reactive power versus three phase shifting angles are derived and analyzed.Finally,zero phase angle （ZPA） strategy is proposed for bidirectional WPT systems.A simulation model and a prototype are implemented to verify the analysis.
出处
《电力电子技术》
CSCD
北大核心
2018年第3期29-31,共3页
Power Electronics
关键词
无线输电
双向
多移相角控制
wireless power transfer
bidirectional
multiple phase shifting angles control
