An Optimal Power Flow Algorithm for the Simulation of Energy Storage Systems in Unbalanced Three-Phase Distribution Grids

An optimal power flow algorithm for unbalanced three-phase distribution grids is presented in this paper as a new tool grid planning on low voltage level. As additional equipment like electric vehicles, heat pumps or solar systems can sometimes cause flows, existing algorithms have to be adapted. In comparison considering balanced the uses complete model of four-wire grid. Additionally, constraint unbalance introduced. The used optimize operation energy storage systems. model, constraints, objective function and solver are explained detail. A validation using commercial done. three exemplary optimizations performed show possible applications tool.