Model Predictive Control for a New Magnetic Linked Multilevel Inverter to Integrate Solar Photovoltaic Systems With the Power Grids

Mahfuz-Ur-Rahman, A. M.; Islam, Md. Rabiul; Muttaqi, Kashem M.; Sutanto, Danny

doi:10.1109/tia.2020.3024352

Cited by 34 publications

(9 citation statements)

References 17 publications

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“…This structure is shown in Figure 11. Some studies have discussed the advantages of using a CHB MMI topology with a common high-frequency magnetic link for large-scale PV plants [65,66]. For example, the use of several isolated DC-DC converters and a common DC link can be removed, offering a reduction in the number of conversion stages and improved performance efficiency.…”

Section: Cascaded H-bridge (Chb)mentioning

confidence: 99%

Modular Multilevel Converters for Large-Scale Grid-Connected Photovoltaic Systems: A Review

Alotaibi

Darwish

2021

Energies

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The use of photovoltaic (PV) systems as the energy source of electrical distributed generators (DG) is gaining popularity, due to the progress of power electronics devices and technologies. Large-scale solar PV power plants are becoming the preferable solution to meet the fast growth of electrical energy demand, as they can be installed in less than one year, as compared to around four years in the case of conventional power plants. Modular multilevel inverters (MMIs) are the best solution to connect these large-scale PV plants to the medium-voltage (MV) grid, due to their numerous merits, such as providing better power quality, having higher efficiency, providing better reliability, and their scalability. However, MMIs are still progressing and need some improvement before they can be implemented safely in the industrial, medium, and high voltage networks. The main purpose of this paper is to review the present MMIs topologies when used in PV applications. The review aims to present a comprehensive study of the various recent submodule circuits associated with MMI topologies. Maximum power point tracking (MPPT) control schemes for PV inverters will be explored extensively. Then, the different control strategies of PV MMIs will be presented and compared to give a holistic overview of the submodules balancing techniques, ranges, and capabilities under balanced and unbalanced grid conditions. In addition, the paper will discuss the future of PV MMIs systems in electricity networks.

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Section: Cascaded H-bridge (Chb)mentioning

confidence: 99%

Modular Multilevel Converters for Large-Scale Grid-Connected Photovoltaic Systems: A Review

Alotaibi

Darwish

2021

Energies

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“…The operating principle, which is based on the coupled inductor‐based inverter, has the potential to regulate the DC input voltage of the system [23] and enables the photovoltaic array to extract a maximum amount of energy, compact size, and reduced economical cost, and the saving of magnetic core can be attained are the advantages in this method [24]. The grid‐tied inverter with buck‐boost type is applied for designing an Aalborg inverter with six switches that have supplied the load in earlier conventional methods [25]. Implementing the novel inverter helps in various fields of power systems, like enhancing the voltage profile in the system [26].…”

Section: Introductionmentioning

confidence: 99%

Design of advanced Aalborg inverter for extracting maximum power from renewable energy sources tied with autonomous grid system

Selvaraj¹,

Kumar²,

Tamilarasan³

et al. 2023

IET Power Electronics

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Owing to increased energy demand, renewable energy sources have recently reached greater heights in the power industry. In this regard, integrating renewable energy with the power grid system has become essential in meeting consumer's energy demands. The novelty in this article is the design of an advanced Aalborg inverter with a reduced number of switches which results in enhanced system performance by reducing the switching losses. Integrating renewable energy sources with the power grid network has gained massive importance in supplying electric power to consumers. Integrating the power grid with renewable energy has become possible with the implementation of grid tie inverters. The only drawback in implementing renewable energy sources with the power grid is that the output of the resources varies from time to time in nature. Voltage Source Inverter‐based grid system requires two or three‐stage inverters for interfacing power units to transfer DC energy into the power grid network. To reduce the switching frequency across the system, many new excellent inverters have been designed to ensure the healthy operation of the system operating at a higher frequency. This article has been coined with the investigation of a novel buck and boosts converter‐based inverter operation named Aalborg inverter. The inverter operates at a higher frequency and minimum voltage drop across the inductor, where only one power stage has been implied to enhance the system's reliability and efficiency. This novel Aalborg inverter is applied and investigated for photovoltaic application.

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“…As argued in [11], increasing the number of voltage levels is a desirable necessity to enhance the MLI performance. Therefore, many MLIs are intensively developed to increase the output voltage levels with reduced component counts [11][12][13][14][15][16][17][18][19][20][21][22]. Among them, transformer-based MLIs have received great attention with key features of reducing DC source count and maximizing the output voltage [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Three-Phase Transformer-Based Multilevel Inverter With Reduced Component Count

et al. 2022

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This paper proposes a novel three-phase transformer-based multilevel inverter (MLI) topology to maximize the output voltage levels for high-power high-voltage applications while reducing component counts as compared to its transformer-based counterparts. The proposed hybrid topology is formed by connecting a three-level T-type module with full H-bridge cells through single-phase transformers. The Ttype module is fixed while the full H-bridge cell can be repeated for enlarging the output voltage levels without increasing the voltage stress on switches. Key features of the proposed topology include low part count, capacitor-free, diode-free, voltage boosting, simple control, and modularity. Within the framework, a simple low-frequency pulse width modulation (LFPWM) switching scheme is used to control the output voltage, and the working principle is detailed for seven-, nine-, and N-level operation. The operability and performance of the proposed topology are numerically verified and experimentally validated at different loads. Moreover, its conversion efficiency is experimentally examined. Finally, a comparative study with existing transformer-based MLI circuits is conducted to prove its key merits.INDEX TERMS Cascaded-transformer multilevel inverter (CTMI), DC-AC converter, hybrid multilevel inverter (MLI), multilevel inverter topology.

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Model Predictive Control for a New Magnetic Linked Multilevel Inverter to Integrate Solar Photovoltaic Systems With the Power Grids

Cited by 34 publications

References 17 publications

Modular Multilevel Converters for Large-Scale Grid-Connected Photovoltaic Systems: A Review

Modular Multilevel Converters for Large-Scale Grid-Connected Photovoltaic Systems: A Review

Design of advanced Aalborg inverter for extracting maximum power from renewable energy sources tied with autonomous grid system

Hybrid Three-Phase Transformer-Based Multilevel Inverter With Reduced Component Count

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