Calculation of Test Cell Capacitance of Insulating Oils Dielectric Dissipation and Resistivity Tester
JIA Duo1,2,LÜ Jin-hua1,2,3,CAI Jin-hui1
1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018,China
2. Inner Mongolia Institute of Metrology Testing and Research,Hohhot, Inner Mongolia 010050,China
3. Inner Mongolia Administration For Market Regulation, Hohhot, Inner Mongolia 010010,China
Abstract：The test cell is an important part of the insulating oils dielectric dissipation and resistivity tester. The capacitance of test cell with air as the medium affects the measurement accuracy and calibration results of the instrument. In order to obtain the accurate capacitance value of the test cell, according to the geometric structure, the physical model of the parallel distribution of the cone capacitance and the cylinder capacitance is used to derive the theoretical calculation formula, and the modeling and simulation are compared. The results show that the theoretical calculation method has high accuracy and can be used to guide the design and calibration of the tester.
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2023, Vol. 44 
