基于多中继线圈结构的无线电能传输系统恒流/恒压输出方法  

Constant-current/Constant-voltage Output Method for Wireless Power Transfer SystemBased on Multi-relay Coil Structure

作　　者：陈永洪 黎祎阳 杨斌 陈阳[1] 麦瑞坤[1] CHEN Yonghong;LI Yiyang;YANG Bin;CHEN Yang;MAI Ruikun(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学电气工程学院,四川省成都市611756

出　　处：《电力系统自动化》2022年第20期147-154,共8页Automation of Electric Power Systems

基　　金：国家自然科学基金面上项目(51977184);四川省科技计划项目(青年科技创新研究团队项目)(2020JDTD0004)。

摘　　要：在高压杆塔在线监测设备的电池充电过程中,为了兼顾充电速度与安全,常采用恒流/恒压充电方式。文中基于多中继线圈的无线电能传输系统,提出一种仅切换一次系统工作频率便能实现恒流/恒压输出的方法,该方法无需复杂的控制和额外的元件。首先,分析得到恒流、恒压与系统系数矩阵之间的定量关系;然后,采用迭代算法确定各个补偿参数的数值,使得系统在两个不同的频率点上可以分别实现恒流或恒压输出;最后,切换系统的工作频率,即可从恒流输出模式切换到恒压输出模式。实验结果表明,在负载大范围变化时,电流增益和电压增益仅略微变化,且在整个充电过程中几乎没有无功功率。In the battery charging process of online monitoring equipment on the high-voltage tower,in order to take into account the charging speed and safety,the constant-current(CC)/constant-voltage(CV)charging mode is often used.For the wireless power transfer(WPT)system based on the muti-relay coils,this paper proposes a method for realizing CC/CV output by switching the operating frequency of the system only once.The proposed method does not require complicated control and additional components.First,the quantitative relationship between CC/CV output and the system matrix is analyzed.Then,the iterative algorithm is used to determine the value of each compensation parameter,so that the system can achieve CC or CV output at two different frequency points,respectively.Finally,the CC mode can be switched to the CV mode by altering the system frequency.The experimental results demonstrate that the current gain and the voltage gain change only slightly when the load changes over a wide range,and there is almost no reactive power during the whole charging process.

关 键 词：在线监测设备 无线充电 无线电能传输 多中继线圈 恒流 恒压 零相角 切换频率 

分 类 号：TM724[电气工程—电力系统及自动化]