基于架空输电导线振动的压电俘能系统研究

Research on piezoelectric energy harvesting system based on overhead transmission wire vibration

针对架空输电导线振动能量收集与输电线路传感器节点的供能问题,利用压电悬臂梁结构,设计了一种压电俘能系统。基于架空导线微风振动理论,搭建模拟架空导线振动的实验平台。通过实验研究,分析压电俘能装置结构对系统固有频率的影响,以及不同激励频率、不同激励加速度与不同负载条件下压电俘能系统的输出电能特性。实验结果表明:压电俘能系统处在共振频率下,激励加速度达到10 m/s~2时,存在最优负载使输出电压有效值达到16.27 V,输出功率达到5.29 mW,为解决输电线路传感器节点的供能问题提供一种新思路。

Aiming at the problem of vibration energy harvesting of overhead transmission wire and energy supply of transmission wire sensor nodes,a piezoelectric energy harvesting system is designed by using piezoelectric cantilever structure.Based on the aeolian vibration theory of overhead transmission wire,an experimental platform for simulating vibration of overhead wire is built.Through experimental research,the influence of the structure of the piezoelectric energy harvesting device on the natural frequency of the system is analyzed,and the output power characteristics of the piezoelectric energy harvesting system under different excitation frequencies,different excitation accelerations and different load conditions are analyzed.The experimental results show that the piezoelectric energy harvesting system is at the resonant frequency and the excitation acceleration reaches 10m/s2,there is an optimal load to make the output voltage reach 16.27 V and the output power reach 5.29 mW,which provides a new idea for solving the energy supply problem of transmission wire sensor nodes.