Constrained Optimum Photovoltaic Generation Dispatch for Energy Bill Minimization

This paper proposes a new photovoltaic generation dispatch method based on Lagrange multiplier. Initially, a microgrid model is derived from power flux equations. Then, a performance index based on Brazilian regulation is developed. Finally, a cost function design procedure that guarantees the optimum photovoltaic generation dispatch and energy bill minimization is presented in detail. It is demonstrated that a very fast convergence can be obtained with the proposed optimization algorithm, which improves the response of the grid connected PV systems. Simulation results are given to support the theoretical analysis and to illustrate the performance of PV generation dispatch with the proposed optimization algorithm.