The Optimal Parameters of Measuring Electrodes Based on Theory of Boundary Electric Field Measurement

The boundary electric field measurement is applied to monitor the development of electrical trees in real time. The optimization of the parameters of measuring electrodes (MEDs) in the boundary electric field measurement system is a necessary link to achieve accurate measurement of the boundary electric field. In this paper, a two-dimensional electrostatic field model of the boundary electric field measurement system was established, and the influence of MED parameters on the relative error of the measurement of boundary electric field was studied, based on which a feasible method to get the optimal MED parameters was put up. Finally, two groups of optimal MED parameters were obtained: (1) d=1 mm, L=1 mm, and D=0.42 mm; (2) d=1 mm, L=1.63 mm, and D=1 mm.