Abstract
The photovoltaic-diesel-battery (PDB) hybrid system is proposed previously to satisfy power requirements in some remote areas locating out of national power grid. However, to dispatch the uses of different components in PDB hybrid system remains a problem. In this paper, mathematical model of the PDB hybrid system is transformed into an MIMO linear state-space form, and model predictive control (MPC) is applied to its energy dispatching problem. In the MPC design, an objective function is constructed to penalize the use of diesel generator and battery bank, while the use of photovoltaic array is encouraged. Constraints of the system are modeled according to its practical limitations, and are expressed in a compact form. The proposed MPC is designed by using the standard receding horizontal technique. Performances of the closed-loop system is demonstrated by simulation examples, where disturbances in load demand and photovoltaic (PV) power are considered.
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