Unbalanced Three-Phase Optimal Power Flow for the Optimization of MV and LV Distribution Grids

Optimal power flow (OPF) techniques are a basic function of advanced distribution management systems (ADMS) and can be applied effectively for controlling distribution grids at both medium voltage (MV) and low voltage (LV) voltage levels. This chapter shows a basic methodology for the control of smart distribution grids together with some realistic applications aimed to solve operative problems that might be encountered in distribution systems, at both MV and LV levels. Three-phase distribution OPF (TDOPF) mathematical formulations and solutions are similar to the ones adopted for classical single-phase OPF routines. Both three-phase and single-phase approaches must employ nonlinear optimization techniques. The network model used for tests is based on actual data concerning the MV and LV circuits adopted for primary and secondary distribution in a real urban distribution network in the city of Bari. The network model developed for tests comprises three whole MV feeders and secondary substations