摘要
对高压输电线路进行实时精准的在线监测是保障电网稳定运行的有效手段。磁耦合共振无线供电为解决在线监测设备供电困难的问题提供了一种可行方案,但传统磁耦合共振系统耦合程度弱,传输效率对传输距离变化敏感,总体性能欠佳。基于电路模型分析了耦合线圈互感对传输效率的影响,提出了考虑线圈与磁芯耦合影响关系的联合优化方案从而提升传输性能。仿真和实验结果验证了在同轴间距、水平和角度偏移变化时的系统效率提升。为提升磁耦合系统传输效率和距离提供了一种有效方案。
Real-time and accurate on-line monitoring of high-voltage transmission lines is an effective means to ensure the stable operation of power grids.Magnetic coupling resonance wireless power supply is a feasible solution to the power supply problem of on-line monitoring equipment.However,the conventional magnetic coupling resonance system has a poor overall performance due to its weak coupling and the sensitiveness of its transmission efficiency to the change of the transmission distance.The mutual inductance influences of coupling coils on the transmission efficiency are analyzed through magnetic coupling resonance circuit models,and a joint optimization scheme considering the cross influence of coils and cores is proposed to improve the transmission performance.Simulation and experiment have verified the improvement of transmission efficiency under the change of coaxial spacing,horizontal and angular offsets.This study can provide an efficient insight into the optimization of magnetic coupling system.
作者
何继勇
周海阔
朱仁勋
HE Jiyong;ZHOU Haikuo;ZHU Renxun(Yunnan Power Grid Co.,Ltd.Lijiang Power Supply Bureau,Lijiang 674100,China;College of Electrical Engineering,Wuhan University,Wuhan 430072,China)
出处
《中国电力》
CSCD
北大核心
2021年第5期139-147,165,共10页
Electric Power
基金
国家自然科学基金资助项目(基于共振磁耦合的高压输电线路在线监测设备无线供电理论与关键技术研究,51507114)。
关键词
输电线路
磁耦合共振
互感
传输效率
磁芯线圈
联合优化
transmission line
magnetic coupling resonance
mutual inductance
transmission efficiency
coil with magnetic core
joint optimization
