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Optimization Design and Research Character of the Passive Electric Field Sensor

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5 Author(s)
Zhanlong Zhang ; State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing, China ; Lin Li ; Xuemei Xie ; Dongping Xiao
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The electric field has a very significant effect on the working conditions of electrical equipment. A passive electric field sensing system is developed to measure electric field strength based on the electric field induction theory. This paper studies an electric field sensing system comprising a probe head radius of 30 mm and a potential electrode radius of 18 mm. The testing system of the power frequency electric field is established according to GB/T12720-1991, and the calibration test experiment of the sensor is carried out. With a capacitance of 350 pF and a frequency electric intensity value of <;12 kV · m-1, the sensor system has good linearity with a nonlinearity error of ~6.68%. The results of the study indicate that the sensory system meets the requirements of practical engineering.

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IEEE Sensors Journal  (Volume:14 ,  Issue: 2 )