Related Experiment Video
Updated: Dec 31, 2025

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Correction for Polarization Current Curve of Polymer Insulation Materials in Transformers Considering the Temperature
Hanbo Zheng1, Benhui Lai1, Yiyi Zhang1
1College of Electrical Engineering, Guangxi University, Nanning 530004, China.
Abstract:
Depending on the study of the master curve technique, a temperature correction model for the polarization current of transformer polymer (cellulose) insulation, considering the effects of both moisture content (mc%) and temperature is proposed. In the current work, the shift factors of polarization current curves of samples with various moisture contents are extracted at different temperatures. Then, the variation law among the shift factor, test temperature, and moisture content are studied so as to establish the corresponding functional relationship. The findings reveal that the modified model derived from the above functional relationship could be employed to perform the temperature correction of oil-immersed polymer samples with various insulation states. Therefore, the proposed temperature correction model in this paper will promote the state assessment of the field transformer polymer insulation.
Related Concept Videos
Dielectric Polarization in a Capacitor
Energy Losses in Transformers
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
Susceptibility, Permittivity and Dielectric Constant
Three-Winding Transformers
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
Power Factor Correction
Equivalent Circuits for Practical Transformers
In a practical transformer, each winding exhibits resistance and leakage reactance. The...

