【摘要】 为解决常规电流互感器(CT)电源取能范围小与电压不稳定等问题，提出一种磁芯并行工作结合超级电容器的CT取能电源设计方案。建立CT取能电源等效模型，分析电源输出电压与功率数学模型，并根据数学模型分析磁芯材料对取能范围的影响；同时为电源增设超级电容储能系统，分析电容电压与取能效率之间的关系，并选择合适的电容电压提高电源取能效率。仿真结果表明，提出的CT取能电源能在3～1000 A稳定供电，有效防止CT饱和，保证电源稳定可靠工作。更多还原

【Abstract】 In order to solve the problems of small energy range and voltage instability of conventional current transformers(CT) as power supply. A CT-based power supply scheme combining magnetic core parallel operation with supercapacitor is proposed. The equivalent model of CT power supply is established, and mathematical model of output voltage and output power is derived. According to the mathematical model, the influence of magnetic core material on energy range is analyzed. At the same time, by introducing supercapacitor to the power supply, the relationship between capacitor voltage and energy extraction efficiency is analyzed, and the appropriate capacitor voltage is determined to improve power efficiency. Simulation results show that the proposed CT power supply can provide power stably at 3～1000 A, which can effectively prevent CT saturation and ensure stable and reliable operation.更多还原