An Effective Model Predictive Control Method With Self-Balanced Capacitor Voltages for Single-Phase Three-Level Shunt Active Filters

Hasan Komurcugil,Frede Blaabjerg,Sertac Bayhan,Naki Guler

doi:10.1109/access.2021.3097812

Hasan Komurcugil, Frede Blaabjerg + Show 2 more

Open Access

https://doi.org/10.1109/access.2021.3097812

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Journal: IEEE Access	Publication Date: Jan 1, 2021
Citations: 15	License type: CC BY 4.0

Affiliation: Aalborg University, Hamad bin Khalifa University

Abstract

This paper presents an effective model predictive control (MPC) method for single-phase three-level T-type inverter-based shunt active power filters (SAPFs). The SAPF using T-type inverter topology has not been reported in the literature yet. Contrary to most of the existing MPC methods, the proposed MPC method eliminates the need for using weighting factor and additional constraints required for balancing dc capacitor voltages in the cost function. The design of cost function is based on the energy function. Since the factor used in the formulation of the energy function does not have any adverse influence on the performance of the system, the cost function becomes weighting factor free. The weighting factor free based MPC brings simplicity in the practical implementation. The effectiveness of the proposed MPC method has been investigated in steady-state as well as dynamic transients caused by load changes. The theoretical considerations are verified through experimental studies performed on a 3 kVA system.

Highlights

The widespread use of renewable energy sources, distributed generation sources, plug-in electric vehicles, and powerelectronics loads such as consumer electronics, light emitting diode (LED) lights, electric drives, and diode rectifiers result in harmonic pollution in the power grid
An energy function based model predictive control (MPC) method is proposed for single-phase three-level T-type inverter based shunt active power filters (SAPFs)
Unlike the existing MPC methods, the proposed MPC method eliminates the need for using weighting factor in the cost function

Summary

INTRODUCTION

The widespread use of renewable energy sources, distributed generation sources, plug-in electric vehicles, and powerelectronics loads such as consumer electronics, light emitting diode (LED) lights, electric drives, and diode rectifiers result in harmonic pollution in the power grid. Lyapunov-function based control method offers fast response and assures global stability of the system at the expense of employing complicated controller in continuoustime [10]. Sliding mode control (SMC) approach exhibits fast current loop dynamics as well as simple implementation without parameter sensitivity [11] It suffers from chattering, which leads to an uncontrollable switching frequency. Even though the deadbeat control method has fast current loop dynamics, it is dependent on the system parameters, which cause performance degradation. The predictive control method has received considerable attention by many researchers due to its prominent advantages such as fast dynamic response and the prediction of future behavior of the controlled variables. An effective MPC method is proposed for a single-phase three-level T-type inverter based SAPF. Extensive experimental results are presented to validate the proposed control approach

MODELING OF SAPF

DESIGN OF ENERGY FUNCTION BASED MPC

EXPERIMENTAL VERIFICATION

CONCLUSION