| 引用本文: | 程志远,桑 卓,袁 鑫,等.高压输电线路低电流CT取能技术研究[J].电力系统保护与控制,2025,53(22):123-131.[点击复制] |
| CHENG Zhiyuan,SANG Zhuo,YUAN Xin,et al.Research on low current CT energy harvesting technology for high voltage transmission lines[J].Power System Protection and Control,2025,53(22):123-131[点击复制] |
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| 摘要: |
| 针对电流互感器(current transformer, CT)取能装置在输电线路低电流时无法实现在线监测设备实时供电的问题，提出了一种谐振式CT取能方法和与之相对应的优化方法。首先，通过理论分析构建了综合质量-互感-损耗的数学优化模型。然后，采用第二代遗传算法(non-dominated sorting genetic algorithm-II, NSGA-II)进行最优设计，确定了CT机械尺寸、补偿电容及匝数等关键性参数，从而极大提升了CT取能装置的输出功率。最后，仿真和实验结果表明，在输电线路电流低至15 A的工况下，所采用的谐振式CT取能优化方法可使输出功率提升至2.186 W，约为相同条件下传统CT取能方法的6倍，实现了输电线路在线监测设备电源的不间断供给。 |
| 关键词: 高压输电线路 谐振补偿 磁芯优化 电流互感器 |
| DOI：10.19783/j.cnki.pspc.241734 |
| 投稿时间：2024-12-25修订日期：2025-04-25 |
| 基金项目:国家自然科学基金项目资助(51877129) |
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| Research on low current CT energy harvesting technology for high voltage transmission lines |
| CHENG Zhiyuan,SANG Zhuo,YUAN Xin,XU Xiaojie,WU Yalun,LI Dongdong |
| (School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China) |
| Abstract: |
| To address the issue that current transformer (CT) energy harvesting devices are unable to provide real-time power supply to online monitoring equipment under low current conditions in transmission lines, a resonant CT energy harvesting method and its corresponding optimization method are proposed. First, a comprehensive mathematical optimization model integrating quality factor, mutual inductance, and losses is established through theoretical analysis. Subsequently, the non-dominated sorting genetic algorithm II (NSGA-II) is employed to perform optimal design, determining key parameters such as CT mechanical dimensions, compensation capacitance, and number of turns. This significantly enhances the output power of the CT energy harvesting device. Finally, simulation and experimental results demonstrate that under a transmission line current as low as 15 A, the proposed self-resonant CT energy harvesting method achieves an output power of 2.186 W—approximately 6 times higher than that of conventional CT-based methods under the same conditions—thereby enabling uninterrupted power supply for transmission line online monitoring equipment. |
| Key words: high-voltage transmission lines resonant compensation magnetic core optimization current transformer |
