Power Balancing Strategy for Cascaded H-Bridge Inverter in a Grid-Connected Photovoltaic System Under Asymmetrical Operating Conditions

Tanguturi, Jitendra; Keerthipati, Sivakumar

doi:10.1109/tie.2023.3292869

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…A cascaded H-bridge multilevel inverter comprises seriesconnected full-bridge inverters and, in comparison to other multilevel inverters, features fewer switching elements at the same level [18,28]. The simplicity of its structure, ease of maintenance, minimal component count, high modularity, straightforward control, and absence of voltage balancing issues make cascaded H-bridge multilevel inverters widely preferred [29].…”

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Performance Analysis of Modulation Strategies in Single-Phase HBNPC Inverter Across Variable Operating Conditions

Cavli,

Ozkop

2024

IEEE Access

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This study investigates the performance of a single-phase 5-level H-Bridge Neutral Point Clamped (HBNPC) inverter across various operating conditions. These conditions encompass variations in output power, frequency, modulation index, and modulation techniques. To adapt modulation strategies typically employed in 3-phase inverter structures, we apply them to a single-phase HBNPC inverter. The modulation strategies under consideration include level-shifted (LS) based on phase disposition pulse width modulation (PD-PWM), third harmonic injection pulse width modulation (THI-PWM), space vector pulse width modulation (SV-PWM), and modified PWM (MPWM). These strategies are developed using different types of reference signals (RS) and carrier signals (CS). Initially, we analyze the inverter's output voltage and current waveforms across various modulation strategy states. Subsequently, we explore the relationships between efficiency, total harmonic distortion (THD), and variable output power across different modulation strategy states. We uncover distinct patterns between modulation strategy-THD, efficiency, and output voltage for maximum inverter output power. Furthermore, we examine the relationship between the modulation index and THD for each modulation strategy state, considering different switching frequencies. Additionally, we investigate the relationship between switching frequency and THD across different modulation index values, approaching the analysis from multiple perspectives. INDEX TERMS Multilevel inverter, modulation technique, carrier signal, HBNPC I. INTRODUCTION

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confidence: 99%

Performance Analysis of Modulation Strategies in Single-Phase HBNPC Inverter Across Variable Operating Conditions

Cavli,

Ozkop

2024

IEEE Access

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Performance evaluation of PUC7‐based multifunction single‐phase solar active filter in real outdoor environments: Experimental insights

Khettab,

Kheldoun,

Bradai

et al. 2024

IET Renewable Power Gen

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This paper presents a novel architecture to enhance the performance of grid‐connected photovoltaic (PV) systems through the introduction of several key novelties. Firstly, a packed U‐cell seven‐level (PUC7)‐based single‐phase solar active filter is implemented, offering a comprehensive solution for harmonics mitigation, reactive power compensation, and efficient power extraction from the PV source, while facilitating the injection of real power into the grid. Secondly, the p‐q power injection algorithm is modified to accommodate the extraction of solar power from the PV generator to the grid, simultaneously addressing the need for harmonic current injection to improve power quality. This modification ensures dynamic performance by extracting reference current with harmonic content and solar power information, thereby enhancing the system's overall efficiency. Lastly, the proposed architecture undergoes real outdoor testing, validating its performance in various key aspects including maximum power tracking, reduction of total harmonic distortion in comparison with previous work, operation at unity power factor, and testing the effective operation of the multifunction feature. These contributions collectively demonstrate the effectiveness of the proposed system in enhancing power injection quality and reactive power compensation under real outdoor conditions of PV systems connected to the grid.

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Analysis of Performance for Multilevel Inverters Utilizing Different Pulse Width Modulation Techniques

Madhaiyan,

Murugesan,

Sengottaiyan

et al. 2023

2023 First International Conference on Advances in Electrical, Electronics and Computational Intelligence (ICAEECI)

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Power Balancing Strategy for Cascaded H-Bridge Inverter in a Grid-Connected Photovoltaic System Under Asymmetrical Operating Conditions

Cited by 5 publications

References 29 publications

Performance Analysis of Modulation Strategies in Single-Phase HBNPC Inverter Across Variable Operating Conditions

Performance Analysis of Modulation Strategies in Single-Phase HBNPC Inverter Across Variable Operating Conditions

Performance evaluation of PUC7‐based multifunction single‐phase solar active filter in real outdoor environments: Experimental insights

Analysis of Performance for Multilevel Inverters Utilizing Different Pulse Width Modulation Techniques

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