Three-Phase Power Flow Algorithm for Distribution Network using a Standardized Matrix Form

Inhalt:
With continuous expansion of renewable energy installation scale, it is increasingly necessary to carry out power quality analysis on distribution network. The traditional power flow method for distribution network is mainly based on the back-forward sweep algorithm. When three-phase unbalance problems are considered, the complexity of algorithm increases sharply. Additionally, the convergence of power flow can not be guaranteed when control strategy of renewable energy sources changes. In order to solve this problems, the paper proposes a three-phase power flow algorithm for distribution network. It can take power quality into consideration and can be used to calculate power flow of various grid structures. The framework of algorithm in the paper uses matrix operations such as inner product, index matrix and incidence matrix to generate three-phase admittance matrix and corresponding matrix of three-phase power flow with Newton-Raphson method. The paper uses OpenDSS to verify the accuracy of the method on IEEE33 test case.