Self-Powered Vibration Frequency Monitoring Device for the Grid Based on Triboelectric Nanogenerator and Micro Thermoelectric Generator

The galloping of transmission lines (GTLs) has a significant impact on the development of smart grids. However, traditional vibration frequency monitoring devices for transmission lines suffer from issues such as low measurement accuracy, high environmental requirements, and the inability to achieve self-powering. A self-powered vibration frequency monitoring method is proposed based on frequency-sensing triboelectric nanogenerator (F-TENG) and micro thermoelectric generators (MTEG). Models for vibration frequency sensing based on F-TENG and energy capture based on MTEG are established. A flexible self-powered sensing prototype, integrating F-TENG, MTEG, and a Signal processing and Energy harvesting Circuit (SEC), is fabricated. Additionally, an innovative solvothermal method for the preparation of MTEG materials is presented, resulting in Bi2Te3-based thermoelectric materials with significantly high thermoelectric conversion performance. Experimental results demonstrate that within the range of 0.1-5.1 Hz, F-TENG can precisely perceive the frequency of GTLs, with a maximum error of 1.274%. MTEG achieves a maximal open-circuit voltage of 3.282 V. Finally, the SEC unit is designed to couple the outputs of F-TENG and MTEG for frequency calculation and wireless transmission to a microcontroller. This device provides an efficient solution for monitoring the frequency of GTLs and offers robust support for the stability of the smart grid. In this study, based on Triboelectric Nanogenerator and Micro Thermoelectric Generator, which adopts a new method to prepare thermoelectric materials, a self-powered sensor for detecting the galloping frequency of transmission lines is proposed for the first time. The detection error is only 1.274%, and the wireless transmission of the detection results is realized. image