Design of an electro-optical sensor with high sensitivity for AC electric field measurement

Peng, Jun; Bian, Jiaming; Jia, Shuhai; Kang, Xilong; Yu, Hongqiang; Yang, Yue

doi:10.1108/sr-05-2021-0160

Cited by 1 publication

(1 citation statement)

References 25 publications

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“…At present, there are two main non-contact voltage sensing methods: photoelectric sensing and electric field coupling sensing [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Photoelectric sensing technology is based on the optical principle of voltage measurement [ 13 , 14 , 15 , 16 ]. This method has good measurement accuracy, but it is difficult to achieve large-scale promotion of engineering applications because of the complex structure of optical devices, high cost, complex daily maintenance and repair, and the fact that it is easily affected by ambient light.…”

Section: Introductionmentioning

confidence: 99%

Research on a Non-Contact Multi-Electrode Voltage Sensor and Signal Processing Algorithm

Zhang

Yang

Zhao

et al. 2022

Sensors

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Traditional contact voltage measurement requires a direct electrical connection to the system, which is not easy to install and maintain. The voltage measurement based on the electric field coupling plate capacitance structure does not need to be in contact with the measured object or the ground, which can avoid the above problems. However, most of the existing flat-plate structure voltage measurement sensors are not only expensive to manufacture, but also bulky, and when the relative position between the wire under test and the sensor changes, it will bring great measurement errors, making it difficult to meet actual needs. Aiming to address the above problems, this paper proposes a multi-electrode array structure non-contact voltage sensor and signal processing algorithm. The sensor is manufactured by the PCB process, which effectively reduces the manufacturing cost and process difficulty. The experimental and simulation results show that, when the relative position of the wire and the sensor is offset by 10 mm in the 45° direction, the relative error of the traditional single-electrode voltage sensor is 17.62%, while the relative error of the multi-electrode voltage sensor designed in this paper is only 0.38%. In addition, the ratio error of the sensor under the condition of power frequency of 50 Hz is less than ±1% and the phase difference is less than 4°. The experimental results show that the sensor has good accuracy and linearity.

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