Reduction of common mode voltage for grid-connected multilevel inverters using fuzzy logic controller

Tran, Quang-Tho; Nguyen, Vinh-Quan

doi:10.11591/ijpeds.v14.i2.pp698-707

Cited by 4 publications

(2 citation statements)

References 22 publications

(24 reference statements)

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“…Thus, the POD modulation method is chosen as a benchmark in this paper. In the approach outlined in [30], PWM pulses for controlling the switches are generated using the POD modulation, as illustrated in Figure 2. In this representation, S xj corresponds to the ON/OFF status of the respective switches as defined in (2), with x denoting the phases a, b, and c. The top and bottom transistors of the Hbridge are symbolized as S xj1 and S xj2 , respectively.…”

Section: Multilevel Inverter Systemmentioning

confidence: 99%

An Application of Neural Network-based Sliding Mode Control for Multilevel Inverters

Tran

2024

Eng. Technol. Appl. Sci. Res.

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Multi-level 3-phase inverters using cascaded H-bridges are becoming prominent in the electric drive and renewable energy sectors due to their high capacity and ability to withstand high voltage shocks. Therefore, the modulation and control techniques used in these multilevel inverters have a crucial influence on the quality of the output voltage they produce. The significantly high common-mode voltage amplitude they generate is one of their disadvantages, causing leakage currents and harmonics. This article proposes a new technique using sliding mode control combined with neural networks to manage a three-phase multi-level inverter. The research objective of this innovative technique is to eliminate the need for current controllers and conventional modulation that relies on carrier signals, reducing hardware calculations and enhancing dynamic response. In addition, it demonstrates the ability to minimize harmonics, common mode voltage, and the number of switching counts, thereby limiting the inverter switching losses and increasing device performance. Simulation results performed on a 5-level 3-phase inverter using cascaded H-bridges have confirmed the effectiveness of the proposed method.

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Section: Multilevel Inverter Systemmentioning

confidence: 99%

An Application of Neural Network-based Sliding Mode Control for Multilevel Inverters

Tran

2024

Eng. Technol. Appl. Sci. Res.

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“…A method for grid-connected cascaded multilevel 3-phase inverters that uses fuzzy logic. Current controllers and carriers used for traditional modulation have been totally eliminated by this approach [23]. Speed controller of 3 IM without PWM technology was used to evaluate the performance of the recommended controller under both constant and changing load conditions [24].…”

Section: Introductionmentioning

confidence: 99%

FOPID controlled PV based QBC fed gamma Z-source inverter applicable for pump operations in an induction motor drive

Selvaraj,

David,

Sathi

et al. 2023

IJPEDS

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<span lang="EN-US">A closed loop current mode-fractional-order-PID (CM-FOPID) controlled and PV based quadratic-boost-converter (QBC) fed gamma Z-Source Inverter with Induction motor system (PV-QBC-GZSI-IMS) for pump operation is proposed here. This work recommends a combination of QBC with gamma Z-source-inverter between the DC link source and asynchronous motor system. This will reduce the voltage rating of PV panel and its initial cost. GZSI reduces the current spikes in stator current. The objective of this research work is to regulate the speed of PV-QBC-GZSI-IMS. This effort deals with the closed loop response of PV-QBC-GZSI-IMS accompanied by current-mode-proportional integral (CM-PI) and CM-FOPID controllers. The performance investigations are analyzed with the control of QBC fed Gamma Z-source inverter with motor load using CM-PI and CM-FOPID controllers and the detailed comparison has been presented. MATLAB/Simulink outputs obtained with their respective speed and torque characteristics in time domain have been depicted. The closed loop CM-FOPID control of PV-QBC-GZSI-IMS is superior to the closed loop CM-PI control of PV-QBC-GZSI-IMS. The proposed QBC-converter reduces the voltage rating of PV panel and GZSI reduces current spikes in motor. The novelty of the article is to enhance the dynamic response of PV-QBC-GZSI-IMS using FOPID. The steady state error in torque is reduced to 0.52 N-m using FOPID.</span>

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Control of a Grid-connected Inverter using Sliding Mode Control

Tran

2024

Eng. Technol. Appl. Sci. Res.

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The rising popularity of grid-connected multilevel inverters with photovoltaic panels underscores the importance of effective modulation and control strategies for ensuring optimal power quality. The performance of these inverters hinges significantly on modulation and control approaches, specifically addressing issues like common mode voltage, harmonics, switching loss, and dynamic response. This study introduces a novel approach to mitigate current harmonics in these inverters by employing sliding mode control. Notably, this technique achieves harmonic reduction without necessitating an increase in the switching count. The presented technique eliminates phase-locked loop, current controllers, and carrier waves, thereby easing hardware computation. Beyond computational efficiency, this approach contributes to enhanced power quality and dynamic response within the inverter system. Simulation results affirm the efficacy of the proposed method when compared to the use of the phase opposite disposition modulation combined with the current controllers. In the nominal operational mode, the proposed method reduces the current Total Harmonic Distortion (THD), the highest magnitude of individual harmonics, and the switching count by 43.6%, 73.5%, and 19.6% respectively, compared with those of the method using the phase opposite disposition modulation combined with current controllers.

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Reduction of common mode voltage for grid-connected multilevel inverters using fuzzy logic controller

Cited by 4 publications

References 22 publications

An Application of Neural Network-based Sliding Mode Control for Multilevel Inverters

An Application of Neural Network-based Sliding Mode Control for Multilevel Inverters

FOPID controlled PV based QBC fed gamma Z-source inverter applicable for pump operations in an induction motor drive

Control of a Grid-connected Inverter using Sliding Mode Control

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