基于压电材料的变压器振动能量收集装置研究
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TM282

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国家自然科学基金资助项目(52007145)


Vibration energy harvesting device for transformer based on piezoelectric material
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Project Supported by National Natural Science Foundation of China (No. 52007145)

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    摘要:

    变压器振动信号在线监测是检测变压器运行状态的重要手段,振动传感器的供能方式制约了振动检测方法的应用。为了实现振动传感器取能,文中设计了一种基于压电材料的变压器振动能量收集装置,利用收集的振动能量为振动传感器供电。首先,根据变压器振动特性,采用多模态取能方式,建立三悬臂式压电取能结构的输出电压与输出功率模型。其次,通过Comsol Multiphysics仿真分析能量收集装置输出功率和外加激励频率的关系。最后,搭建变压器振动能量收集实验平台,测得压电式能量收集装置的实际输出功率为11.547 μW。利用振动能量收集装置为振动传感器供电,可以保障在线监测设备的供电,减少外接电源对设备安全稳定运行的影响。

    Abstract:

    On-line monitoring of transformer vibration signals is an important method to detect the operating status of transformers. The power supply mode of the vibration sensors restricts the application of vibration detection methods. To access the power supply for the vibration sensor,a transformer vibration energy harvesting device based on piezoelectric material is designed,which uses the collected vibration energy to supply the vibration sensor. Firstly,according to the vibration characteristics of transformer,the output voltage and output power models of the three-cantilever piezoelectric energy extraction structure are established using the multi-modal energy harvesting method. Then,the relationship between the output power of the energy harvesting device and the external excitation frequency is analyzed by Comsol Multiphysics simulation. Finally,the transformer vibration energy harvesting experiment platform is built,and the actual output power of the piezoelectric energy collecting device is measured to be 11.547 μW. Using the vibration energy harvesting device could supply power to the oscillation sensor,which can ensure the power supply of the online monitoring equipment and reduce the influence of the external power supply on the safe and stable equipment operation.

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张琛,熊庆,汲胜昌,庄哲,张凡.基于压电材料的变压器振动能量收集装置研究[J].电力工程技术,2021,40(6):173-178

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  • 收稿日期:2021-06-03
  • 最后修改日期:2021-08-10
  • 录用日期:2021-03-04
  • 在线发布日期: 2021-12-06
  • 出版日期: 2021-11-28