A triboelectric-piezoelectric hybrid nanogenerator for wind and magnetic field energy harvesting from power transmission lines

In order to address the issue of insufficient power supply for wireless detection sensors in smart grids. This work proposes a hybrid energy harvester based on the synergistic effect of triboelectric-piezoelectric hybrid mechanisms, capable of simultaneously harvesting wind energy and magnetic field energy around power transmission lines. The upper section employs a tribological nanogenerator (W-TENG) to capture wind energy, while the lower section utilizes a piezoelectric nanogenerator (A-PEG) to harvest magnetic field energy. Through structural co-design, this achieves efficient conversion of multi-source energy. Results demonstrate that at a rotational speed of 1100 rpm and a transmission line current of 18 A, the triboelectric module achieves an output voltage of 980 V, while the piezoelectric module generates 4.08 V, and can charge a 4.7 μF capacitor to 9.7 V within 4 seconds. Utilizing this energy harvester to power wireless monitoring sensors provides an effective solution for advancing micro-energy harvesting technology within smart grids.