Analysis of Distorted Electric Field Using ZigBee-Based Optical Measurement System

It is known that the distorted electric field is generated by a high-voltage alternating current (HVac) transmission line passing through a conductor, but few studies have accurately measured and analyzed it. In this article, we analyze the distorted electric field and distortion rate (DR) using a ZigBee-based optical measurement system. First, the key parameters of the integrated optical sensor (IOS) and the wireless module are discussed, respectively. Second, the plate-plate and ball-plate characteristics of the measurement system are studied, and the results show that the measurement system can accurately measure the uniform and nonuniform electric field within 25 kV/m. Third, the measurements are compared to the calculation values, and the results show that the relative error is within 12%. Finally, the distribution law of DRs when considering the grounded shielding wire and height of the obstacle is analyzed. The findings show that the DR varies with the height of the obstacle but is not affected by the grounded shielding wire.

I. Introduction

The use of high-voltage alternating current (HVac) transmission lines is continuously increasing for electrical energy demand. Limited by the current situation of tight transmission corridors, there are more and more HVac transmission lines appearing in residential areas where the electric field has been distorted. Consequently, the public are concerned about the possible biological effects of being exposed to extremely low-frequency electromagnetic fields underneath these lines [1]–[4].