Power Frequency Voltage Ratio Standard Self-calibration Based on Semi-insulating Voltage Series Summation

In order to study and improve the level of the 110kV frequency voltage ratio standard self-calibration system to meet the requirement of both the rapid development of power grid and voltage transformer test/calibration below 0.005 level,a traceability method based on semi-insulating voltage series summation is proposed.By analyzing the error of the mathematical models based on between the semi-insulating and fully insulating voltage series summation,the analysis indicates that the self-calibration system based on semi-insulating voltage series summation has both higher degree of accuracy and opening with great flexibility.The tests show that new self-calibration system achieves the desired specification.