Método para alocação dimensionamento e operação de baterias em sistemas de distribuição com redução de perda e análise econômica

Abstract

The use of battery energy storage systems (BESS) connected to distribution systems is analyzed. In this work these battery systems are capable of either injecting or draw power from the power systems. When such process happens at appropriate times it leads to an improvement in the electric system indicators. Two methods for optimal sizing, placement and operation schedule management of BESS are proposed aiming to get an optimal result. In this work it is desired to achieve two distinct objectives: the minimization of electrical losses from distribution systems and financial profit maximization due to BESS benefits for a distribution system over a planning horizon. The battery modeling in this paper takes into account the temporal dependency among their operational states and thus aims to portray its real operation. Such temporal dependency is dealt with sequential power flows resolutions, which respects systems operational limits. In addition, the load curve variability is considered during the process. The optimization is performed through two proposed methods, the first one is an straight search procedure that aims to solve all the problem variables simultaneously The second is an iterative search procedure that defines BESS operation schedule through an optimization process and uses another one to set his sizing and placement. Both proposed methods uses Genetic Algorithms as an optimization tool. Results obtained from simulations in different power systems are presented to demonstrate the applicability of the proposed method.