Abstract
Abstract In an attempt to measure the DC field intensity in the space below the high voltage transmission line, based on the principium of electrostatic induction, the DC-induced signal is transformed into an AC signal by continuously changing the relative area of the parallel plate capacitor, and then the signal is filtered and amplified. The measured value of the field to be measured is obtained from the amplitude of the output signal. The influences of the number of openings on the electric field distribution, the induced charge, and the output current in the adjacent space of the capacitive plate are studied by modeling and simulation. An experimental device is built to study the influence of the number of plate openings on the measurement results, and the simulation results are compared and analyzed. The calibration error of the field grinding sensor designed in this paper is about 6%, and the results show that the method can be applicable to the measurement of electric fields in DC transmission engineering.
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