Browsing by Author "Norena L.F.G."

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Current control mode in PV systems integrated with DC-DC converters for MPPT: An IDA-PBC approach
(IEEE Computer Society, 2018) Velazquez I.O.; Perez G.R.E.; Giraldo O.D.M.; Ruiz A.G.; Norena L.F.G.
In this paper, an interconnection and damping assignment passivity-based control (IDA-PBC) theory is employed to obtain maximum power point tracking (MPPT) for a photovoltaic (PV) module. A current control mode is selected to obtain the general control law, which guarantees exponential stability of the system in the sense of Lyapunov. The current is selected as the objective of control in this paper, due to the variations of irradiance and temperature on the PV module to produce the most impact in the current provided by the panel in comparison with its voltage profile. A modification of the classical IDA-PBC theory is employed to control the dynamical system under trajectory tracking. Simulation results show the capacity of the proposed control to extract the maximum power from the PV module under high changes in the irradiance and temperature. All simulations are conducted in MATLAB/Simulink. © 2018 IEEE.
Nonlinear control for battery energy storage systems in power grids
(IEEE Computer Society, 2018) Giraldo O.D.M.; Gonzalez W.J.G.; Ruiz A.G.; Mejia A.E.; Norena L.F.G.
This paper presents a nonlinear control strategy to integrate Battery Energy Storage Systems (BESS) in electrical power systems connected through Voltage Source Converters (VSCs). Exact feedback linearization control technique based on the dynamical model of the system is employed as control strategy. Two VSCs topologies are proposed to control the generated/consumed current by the BESS. The proposed controller allows the charge/discharge of the BESS with either constant current or constant power. The VSC is employed to independently compensate for the active and reactive power from/to the grid to/from the BESS. A radial distribution network modeled in MATLAB/SIMULINK is implemented as a test system to validate the functionality of the controller under two scenarios. © 2018 IEEE.