Integrated Power Flow Solution for Interconnected Transmission and Distribution Network

with the continuous development of smart grid, more and more distributed generators (DGs) are integrated into distribution network, which has a tremendous impact on the distribution network structure and operation control mode. At the same time, the power flow characteristics of the whole network may be changed. Therefore, it is essential and urgent to research a power flow method for the whole networks with DGs. In this paper, the decomposition and coordination method is used in a flexible power flow method. The conventional Newton-Raphson power flow method is used in transmission network and the three-phase newton power injection method is used in distribution network. The example results show good convergence and convergence speed of the method which can be applied to the power flow and planning of the whole network with DGs.