Analysis and Design Guidelines for Current Control Loops of Grid-Connected Converters Based on Mathematical Models

Gonzalo Abad, Alain Sanchez-Ruiz, Juan José Valera-García and Aritz Milikua
Additional contact information
Gonzalo Abad: Electronics and Computing Department, Mondragon University, 20500 Mondragon, Spain
Alain Sanchez-Ruiz: Ingeteam R&D Europe S.L., 48710 Zamudio, Spain
Juan José Valera-García: Ingeteam R&D Europe S.L., 48710 Zamudio, Spain
Aritz Milikua: Electronics and Computing Department, Mondragon University, 20500 Mondragon, Spain

Energies, 2020, vol. 13, issue 21, 1-47

Abstract: Having a method for analyzing and designing regulators of controls that contain many current loops such as active filters is not a trivial task. There can be many parameters of regulators and filters that must be carefully selected in order to fulfill certain desired requirements. For instance, these can be stability, dynamic response, robustness under uncertainty of parameters, and rejection capability to switching harmonics. Hence, this paper provides general analysis guidelines for designing current control loops by using mathematical models in an αβ reference frame. Then, by using the proposed modeling tool, a multi-objective tuning algorithm is proposed that helps obtain all the control loops’ regulator and filter parameters, meeting all the desired requirements. Thus, the proposed analysis and design methodology is illustrated by applying it to three different controls conceived in a dq rotating reference frame with PI (Proportional Integral) regulators. The first control presents two current loops (simple dq current control), the second control uses four current loops (dual vector control, for unbalanced loads), while the third control presents eight current loops (active filter controlling current harmonics). Several experimental and simulation results show the effectiveness and usefulness of the proposed method. Since the mathematical model employed is in the αβ reference frame, it can also be easily applied to controls conceived in a αβ reference frame using resonant regulators, providing also a common comparative framework.

Keywords: AC grids; mathematical modeling; control design; multi-objective algorithm (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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