Control de voltaje óptimo para sistemas de almacenamiento de energía de batería (BESS) acoplados a microrredes de AC utilizando algoritmos LQG

Abstract

The present research develops an optimal voltage control strategy of disturbed Battery Energy Storage Systems (BESS) coupled in AC Hybrid Microgrids (HMG) in AC / DC. The proposed strategy is mainly based on a Gaussian Linear Quadratic Control (LQG), a method that enables the control of disturbed non-linear systems such as BESS. The study allows to obtain an optimal control law by linear dynamic feedback for BESS systems coupled by electronic voltage converters in cascade. The study was implemented in a benchmark HMG system that operates under normal conditions, without failures and in isolated mode. The results obtained were validated and compared with a classic PI control using digital simulation in Matlab / Simulink. Furthermore, the dynamic behavior of the plant voltage will be analyzed in two cases; maximum demand and minimum demand, at one point of operation.