Abstract
In this paper, we investigate the energy problem of monitoring sensors on high-voltage power transmission lines and propose a wireless charging scheme for a Radio Frequency IDentification (RFID) sensor tag to solve a commercial efficiency problem: the maintenance-caused power outage. Considering the environmental influences on power transmission lines, a self-powered wireless energy relay is designed to meet the energy requirement of the passive RFID sensor tag. The relay can obtain the electric field energy from the transmission lines and wirelessly power the RFID sensor tags around for longer operating distance. A prototype of the energy relay is built and tested on a 110 kv line. The measurement results show that the energy relay can provide stable energy even with the influences of wind, noise and power outage. To our knowledge, it is the first work to power the RFID sensor tags on power transmission lines.
Highlights
Electricity demand in China has been on the rise with the rapid development of modern industry, while the safety of high-voltage power transmission is becoming vital because of the large supply area of power substations [1]
Two benefits are obvious in the application of the radio frequency identification (RFID) sensor tags on power transmission lines
When designed for a 110 kv line, the peak voltage on C1 can be calculated as 47.13 kv based on the Equation (12), and its effective value of voltage is 33.32 kv
Summary
Electricity demand in China has been on the rise with the rapid development of modern industry, while the safety of high-voltage power transmission is becoming vital because of the large supply area of power substations [1]. A magnetoresistive sensor is designed for monitoring sag and electric current on the transmission tower, far away from high-voltage devices, but few factors can be measured in this way [3]. A smart “stick-on” sensor stuck on to power appliances is designed for autonomous temperature monitoring for low-cost applications. This sensor is only suitable for low-voltage devices. Two benefits are obvious in the application of the RFID sensor tags on power transmission lines. Active tags need batteries, and the communication distance of the passive tags cannot satisfy the needs of long-distance monitoring on power transmission lines. In this paper, the proposed research work investigates designing an energy relay to power the passive RFID sensor tags.
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