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Three-phase unbalanced distribution power flow solutions with minimum data preparation

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4 Author(s)
Whei-Min Lin ; Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan ; Yuh-Sheng Su ; Hong-Chan Chin ; Jen-Hao Teng

An exact three-phase fast decoupled power flow solution is introduced in this paper. This method uses traditional Newton-Raphson algorithm in a rectangular coordinate system. The Jacobian matrix of the proposed method can be decoupled both on phases as well as on real and imaginary parts. In addition, the memory requirement of the traditional fast decoupled load flow can be reduced to only one-sixth. The need of the complicated mutual coupling terms can be avoided. It is even possible to solve the distribution system with line conductances only. That is, an exact three-phase distribution load-flow program can be executed with minimum data preparation to substantially offload the burden of distribution engineers. Tests have shown 10 to 100 times performance than other methods for test systems with 45 to 270 buses

Published in:

IEEE Transactions on Power Systems  (Volume:14 ,  Issue: 3 )