Optimization Practice of Insulation Structure of Converter Transformer Based on Artificial Intelligence 3D Configuration and Data Processing

Due to high current of 6300A, the bushing adopts a double conduit direct current carrying structure. The current carrying conduit refers to the bushing 60533 of the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$170 \text{kV / 6000} \mathrm{A}$</tex> oil paper capacitor transformer supplied, which uses a diameter of the 105 copper tube. The relative error between the root mean square value of voltage meter reading and average value meter reading is much greater than 3 %. The method is to divide the capacitor core into three parts, uniformly insert the 1-4 layers of auxiliary plates (small plates) with the length of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{3 0 0 - 5 0 0 m m}$</tex> into the insulation layer between main plates (large plates). it can be seen temperature has significant impact on polarity of interface charges. When experimental temperature is 40° C, charge peak appears at interface 1 and a positive charge peak appears at the interface 2, and the charge amount increases with the time. When experimental temperature was at 80° C, the positive charge peak appeared at interface 1 and the negative charge peak appeared at interface 2. The charge amount reached its maximum value at 5000s, and then showed decreasing trend.