Control for Three-Phase LCL-Filter PWM Rectifier with BESS-Oriented Application

Dante Mora, Ciro Núñez, Nancy Visairo, Juan Segundo and Eugenio Camargo
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Dante Mora: Faculty of Engineering, University of San Luis Potosí, San Luis Potosí 78290, Mexico
Ciro Núñez: Faculty of Engineering, University of San Luis Potosí, San Luis Potosí 78290, Mexico
Nancy Visairo: Faculty of Engineering, University of San Luis Potosí, San Luis Potosí 78290, Mexico
Juan Segundo: Faculty of Engineering, University of San Luis Potosí, San Luis Potosí 78290, Mexico
Eugenio Camargo: Faculty of Engineering, University of San Luis Potosí, San Luis Potosí 78290, Mexico

Energies, 2019, vol. 12, issue 21, 1-17

Abstract: This paper deals with a battery energy storage system (BESS) in only one of its multiple operating modes, that is when the BESS is charging the battery bank and with the focus on the control scheme design for the BESS input stage, which is a three-phase LCL-filter PWM rectifier. The rectifier’s main requirements comprise output voltage regulation, power factor control, and low input current harmonic distortion, even in the presence of input voltage variations. Typically, these objectives are modeled by using a dq model with its corresponding two-loop controller architecture, including an outer voltage loop and a current internal loop. This paper outlines an alternative approach to tackle the problem by using not only an input–output map linearization controller, with the aim of a single-loop current control, but also by avoiding the dq modeling. In this case, the voltage is indirectly controlled by computing the current references based on the converter power balance. The mathematical model of the three-phase LCL-filter PWM rectifier is defined based on the delta connection of the filter, which accomplishes the requirements of a 100 kW BESS module. Extensive simulation results are included to confirm the performance of the proposed closed-loop control in practical applications.

Keywords: battery energy storage system (BESS); LCL filter; PWM rectifier; nonlinear control; tracking problem (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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