文中介绍了一种基于交流电场感应的取能电源，用于输电线路在线监测装置的供电。然而该类电源的输出功率较低，无法满足在线监测装置的用电需求。因此，在理论分析的基础上，文中设计了一种同轴双柱形的感应电极结构，以提高电源的输出功率。文中利用COMSOL Multiphysics软件建立仿真模型，并进行电磁场仿真分析。仿真结果表明，在10 kV电压等级下，所设计的感应电极可产生3.35 mA以上的感应电流。为验证仿真结果的准确性，文中利用自行搭建的测试平台进行实验验证，并将实验结果与仿真结果进行对比。实验结果表明，在负载电阻大于5 kΩ时，文中设计的取能电源可以输出超过630 mW的连续功率，与仿真结果基本吻合。通过文中的研究，成功解决了电场感应取能电源输出功率低下的问题，并提供了一种新型取能电路的设计思路和技术方案。
An energy harvesting power supply based on AC electric field induction is introduced, which is used for power supply of online monitoring devices for transmission lines. However, the output power of this type of power supply is relatively low, which cannot meet the electricity demand of online monitoring devices. Therefore, based on theoretical analysis, a coaxial dual column inductive electrode structure is designed in the article to improve the output power of the power supply. A simulation model is established using COMSOL Multiphysics software and electromagnetic field simulation analysis is conducted. The simulation results show that the designed inductive electrode can generate an induced current of over 3.35 mA at a voltage level of 10 kV. To verify the accuracy of the simulation results, an experimental verification is conducted using a self built testing platform in the laboratory, and the experimental results are compared with the simulation results. The experimental results show that when the value of load resistance is higher than 5 kΩ, an energy harvesting power supply can output continuous power exceeding 630 mW, which is basically consistent with the simulation results. Through the research in the article, the problem of low output power of electric field induction energy harvesting power supply has been successfully solved, and a new design concept and technical solution of energy harvesting circuit has been proposed.