Structural Optimization Design of Heavy Protective Current Transformers

The heavy protective current transformers are very important to the reliability of the protective devices in power system. The heavy protective current transformer, which is mounted on the bus bars at the outset of 1000MW generators, will be severely influenced by the heavy currents in the adjacent bus bars. Structural optimization design of TPY class heavy protective current transformers in the steady state and transient state with and without stray flux are determined by analytical formulas and further analyzed by finite element method (FEM).