Electric Field and Potential Changes Studies on Cast-Resin Dry-Type Power Transformer Having Misalignment

摘要

The cast resin dry type (CRDT) transformer is free maintenance during services, however it is necessary to check the CRDT condition during manufacturing and installation to prevent any defects that give an impact on its service period. In this work, a CRDT sectional body was modelled and analysis on the pattern of the electric field and potential distribution in CRDT having misalignment was done using finite element software. The objective of this project to investigate the changes in the electrical field distribution inside the sectional body due to above faults. The simulation was performed in HV winding for the ideal condition and when faults occurred. The electric field distribution and the electrical potential was plotted in a graph and certain condition was applied to the winding in the transformer to further analyses the pattern of the graph. The research found highest changes of electrical potential is during misalignment faults with the increment of 11 kV compared value compared to ideal.