基于内外环磁芯结构的输电线轻型感应取能CT设计

Design of light induction energy harvesting CT for transmission lines based on inner and outer annular magnetic core structure

结合对感应取能电流互感器(CT)的原理分析,对其磁芯结构进行优化,设计了内外双环形的磁芯。利用NSGA-Ⅱ优化算法,以体积为约束条件,重量和输出功率为目标函数,对磁芯尺寸进行最优参数设置,减小了磁芯重量,同时增大了取能功率,最后在Maxwell中进行仿真验证。结果表明,在将磁芯重量降低到1.02 kg后,CT取能端在一次侧电流为10 A时输出功率达0.17 W,同时在一次侧电流为10~900 A的范围内能够正常工作,具有一定的工程应用价值。

Combined with the principle analysis of the inductive current transformer(CT),the structure of its magnetic core is optimized,and the internal and external double annular magnetic core is designed.Using NSGA-Ⅱ optimization algorithm,taking volume as constraint condition,weight and output power as objective function,the optimal parameters of magnetic core size are set,which reduces the weight of magnetic core and increases the energy taking power.Finally,the simulation is carried out in Maxwell.The results show that after the weight of the magnetic core is reduced to 1.02 kg,the output power of the CT energy taking terminal can reach 0.17 W when the primary current is 10 A,and it can work normally when the primary current is 10-900 A.