Direct power control of electrical energy storage systems: A passivity-based PI approach

This paper proposes a direct power control for electrical energy storage systems (EESS) in ac microgrids. This strategy allows managing instantaneous active and reactive power without using a conventional inner-loop current regulator and without a phase-locked loop, increasing the reliability of the system while reducing investment costs. PI passivity-based control (PI-PBC) is selected to control the direct power model of EESS. This is because their models exhibit a port-Hamiltonian formulation in open-loop, and PI-PBC exploits this formulation to design a PI controller, which guarantees global asymptotically stability in closed-loop in the sense of Lyapunov. Simulations tested the proposed model in a microgrid and compared with conventional vector oriented controls in a dq reference frame and a direct power model controlled via feedback linearization (FL). PI-PBC has a better performance than other two controllers in all considered scenarios. Simulation results have conducted through MATLAB/SIMULINK software by using the SimPowerSystem toolbox. © 2019 Elsevier B.V.

• Fecha de publicación: 2019
• Institución: Universidad Tecnológica de Bolívar
• Repositorio: Repositorio Institucional UTB
• Idioma: eng
• OAI Identifier: oai:repositorio.utb.edu.co:20.500.12585/9017
• Acceso en línea: https://hdl.handle.net/20.500.12585/9017
• Palabra clave: A low-voltage microgrid; Direct power model; Electrical energy storage system; PI passivity-based control; Port-Hamiltonian formulation; Controllers; Energy storage; Feedback linearization; Hamiltonians; Investments; MATLAB; Power control; Electrical energy storage systems; Low voltage microgrid; Passivity based control; Port hamiltonians; Power model; Electric power system control
• Rights: restrictedAccess
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/