Three-phase unbalanced distribution power flow solutions with minimum datapreparation

An exact three-phase fast decoupled power flow solution is introduced in th is paper. This method uses traditional Newton-Raphson algorithm in a rectan gular coordinate system. The Jacobian matrix of the proposed method can be decoupled both on phases as well as on real and imaginary parts. In additio n, the memory requirement of the traditional fast decoupled load flow can b e reduced to only one-sixth The need of the complicated mutual coupling ter ms can be avoided. It is even possible to solve the distribution system wit h line conductances only. That is, an exact three-phase distribution load-R ow program can be executed with minimum data preparation to substantially o ffload the burden of distribution engineers. Tests have shown 10 to 100 tim es performance than other methods for test systems with 45 to 270 buses.