Development of a 10 kV IVD and its Self-calibration Setup at Power Frequency

The present paper introduces the research of a 10 kV power frequency inductive voltage divider (IVD) and its self-calibration device. The two-stage 10 kV IVD used laminated silicon steel cores. The isolation reference IVD and the differential calibrator adopted double-layer shielding. The inner layer works as the equipotential guard to reduce the fluctuation of the reference potential caused by the floating potentials and improved the stability of the reference potentials. The repeatability of the self-calibration results was better than 0.5×10
^-6
, and the deviation of 10 kV : 100 V was better than 1×10
^-6
in ratio error and 1 μrad in phase displacement.