In this paper, a new numerical method of calculating the total impedance of a twin high current busduct consisting of rectangular hollow busbar is proposed. The method is based on the integral equation method and partial inductance theory. Results for impedance of this twin high current busduct have been obtained, and the skin and proximity effects have also been taken into consideration. The validation of the proposed method is carried out through Finite Element Method (FEM) and laboratory measurements, and a reasonable level of accuracy is demonstrated.
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