Abstract

GIL-GONZALEZ, Walter Julián; GARCES, Alejandro  and  ESCOBAR, Andrés. A Generalized Model and Control for Supermagnetic and Supercapacitor Energy Storage. ing.cienc. [online]. 2017, vol.13, n.26, pp.147-171. ISSN 1794-9165.  https://doi.org/10.17230/ingciencia.13.26.6.

This paper presents a generalized linear model based on LMI state-feedback with integral action, applicable to the control of Electric Energy Storage Systems (EESS) such as Superconducting Magnetic Energy Storage (SMES) and Supercapacitor Energy Storage (SCES). A Voltage Source Converter (VSC) and a Pulse-Width modulated Current Source Converter (PWM-CSC) are respectively used to integrate the SCES and the SMES systems to the electrical distribution system. To represent the dynamics between the EESS and the power distribution system a reduced general linear model in the state-space representation is introduced. The proposed control scheme regulates independently the active and reactive power flow between the EESS and ac the grid. Three case scenarios comparing a conventional PI controller and the proposed technique are conducted considering grid voltage fluctuations. Extensive time-domain simulations demonstrate the robustness and proper performance of the proposed controller to operate the EESS as power compensator, in order to improve the operative conditions of electrical distribution systems.

Keywords : Electric energy storage systems (EESS); linear matrix inequality (LMI); supercapacitor energy storage (SCES); superconducting magnetic energy storage (SMES).

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