A Power Supply Technology for a Low-Power Online Monitoring Sensor Based on Electric Field Induction

Abstract

In order to provide a safe and stable power supply for low-power online monitoring sensors of transmission lines, a method of harvesting space electric field energy by using the impedance conversion characteristics of the transformer and the reactive compensation characteristics of the capacitor is proposed. The method effectively solves the key problem that the power of energy harvesting based on electric field induction is limited by the transformer excitation reactance and is difficult to upgrade. In this paper, the principle of power supply technology based on electric field induction is described in detail, and the influencing factors such as the wire erection mode, polar plate installation position, and capacitance compensation characteristics are simulated and tested. The test results show that when the power supply voltage is 50 kV, the stray capacitance is 14 pF, the compensation capacitance is 0.86 nF, and the load resistance is 1 kΩ, the energy-harvesting power is 340 mW. Finally, the power supply circuit of a drive-away-birds apparatus is designed, which shows that it can provide a stable and reliable power supply for online monitoring sensors.

Analyzing the Capabilities of Electric Field Energy Harvesting Using Natural Leaves

“…Each harvester comprises metal electrodes placed within an alternating electric field (EF) and driving circuits to supply appropriate voltage and current levels to low-power loads [3]. In general, electric grid characteristics and harvesting plate design factors influence the performance of EFEHs [5]- [7]. Because of the strong electric field surrounding high-voltage power systems in all directions, self-powered sensors based on EFEHs appear as cost-effective technologies to monitor and control power system equipment [3], [8]- [16].…”

“…The wide range of electromagnetic sources, such as domestic appliances, internal wiring, electric car engines, welding instruments, and industrial equipment, encourage the introduction of EFEHs in our living environment [5]. However, large-size harvesters or multi-harvesters are currently required to accomplish practical applications in all prototypes [5]- [7]. In addition, the modification of electric grid parameters is not practical because power utilities set them [21].…”

Optimization of the Multimedia Consumers Operation Time

“…METERING EXISTING ELECTRICAL ENERGY Several electrical energy monitoring solutions have been developed over the course of time [adg]. Keeping up with the technological development, these monitoring solutions have started from mechanical variants to analog and now digital solutions [4,5,6]. Each product offers more or less the same facilities, but all help to measure the energy amount or to limit the usage time of the energy sources.…”

Modeling and Research on Power System of Distributed Sensor Networks for Long Streamers in Marine Seismic Exploration

“…The sensors include piezoelectric ceramic sensors and microelectro mechanical systems (MEMS) sensors, which receive seismic wave signals reflected by the strata. Large-scale sensor networks and poor working conditions at sea necessitate a system with a convenient and stable power supply [13][14][15]. Most of the exploration instruments on the market adopt a daisy chain structure to transfer high voltage to single nodes.…”