A Medium-Voltage DC-Collection Grid for Large-Scale PV Power Plants With Interleaved Modular Multilevel Converter

Alhuwaishel, Fahad; Allehyani, Ahmed; Al-Obaidi, Sinan A. Sabeeh; Enjeti, P.N.

doi:10.1109/jestpe.2019.2934736

Cited by 38 publications

(5 citation statements)

References 12 publications

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“…Notably, referring to the demands presented in Section II, the PV power converters have to meet various requirements. Furthermore, the requirement of thermal management is one even in applications of high efficiency, and modular multilevel technologies [57], [68] enable the generation being of high power quality, as well as higher reliability due to the increased redundancy and scalability (many modules in use).…”

Section: Conversion Architecture For Large-scale Pv Systemsmentioning

confidence: 99%

Power Electronics Technology for Large-Scale Renewable Energy Generation

et al. 2023

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Power electronics is the enabling technology for the grid integration of large-scale renewable energy generation, which provides high controllability and flexibility to energy generation, conversion, transmission, and utilization. However, power electronics also brings several challenges to conventional power grids, e.g., reducing the system inertia. Advanced control strategies have been developed to enhance the energy conversion process. In this article, the grid-integration structure and control for renewable energy are discussed with a focus on large-scale wind, solar photovoltaic, and energy storage systems. Future research and development trends for these technologies are also presented.

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Section: Conversion Architecture For Large-scale Pv Systemsmentioning

confidence: 99%

Power Electronics Technology for Large-Scale Renewable Energy Generation

et al. 2023

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“…On the other hand, this approach has been limited in MMC applications. In [7] authors proposed a dc-dc interleaved MMC for PV applications. Although, the proposed topology is named as "modular multilevel converter" it only partially resembles to a classical MMC structure, sharing floating capacitors between adjacent submodules.…”

Section: Introductionmentioning

confidence: 99%

A Novel Modular Multilevel Converter Based on Interleaved Half-Bridge Submodules

Viatkin

Ricco

Mandrioli

et al. 2023

IEEE Trans. Ind. Electron.

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A new Modular Multilevel Converter with Interleaved half-bridge Sub-Modules (ISM-MMC) is proposed in this paper. The ISM-MMC exhibits a higher modularity and scalability in terms of current ratings with respect to a conventional MMC, while preserves the typical voltage level adaptiveness. The ISM-MMC brings the known advantages of classical MMC to low-voltage, high-current applications making it a novel candidate for the sector of ultra-fast chargers for all types of electrical vehicles (EV). This advanced topology makes it possible to easily reach charging power of the EV charging system up to 4.5 MW and beyond with low-voltage supply. To operate the new converter, a hybrid modulation scheme that helps to exploit advantages of the interleaving scheme, is implemented, and explained in this paper. It has been verified that the typical MMC control methods are still applicable for ISM-MMC. A comparative study between classical MMC and ISM-MMC configurations in terms of output characteristics and efficiency is also given. Furthermore, it has been demonstrated that the number of ac voltage levels is synthetically multiplied by the number of interleaved halfbridge legs in submodules. Simulations, Hardware-in-the-Loop and Experimental tests are carried out to demonstrate the feasibility of the proposed topology and implemented modulation scheme.

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“…Since the PV power plant AC collection and grid-connection scheme requires multi-stage power conversion equipment and transformation links, it is difficult to reduce system costs and improve system efficiency [4]. Meanwhile, with the large-scale and centralized PV power plant connected to the AC grid, the traditional AC collection and grid-connection scheme has several problems, such as harmonic resonance, synchronous As the main interconnection equipment between the PV array and the HVDC grid, there are several critical technical requirements and challenges of the DC/DC converter for the PV array connected to the HVDC grid, which has become a research hotspot in recent years [10]. The technical requirements of the DC/DC converter for large-scale renewable energy collection applications are studied, and it is pointed out that the DC/DC converter should have the characteristics of high voltage, high voltage gain, large capacity, and unidirectional power flow [11].…”

Section: Introductionmentioning

confidence: 99%

“…As the main interconnection equipment between the PV array and the HVDC grid, there are several critical technical requirements and challenges of the DC/DC converter for the PV array connected to the HVDC grid, which has become a research hotspot in recent years [10]. The technical requirements of the DC/DC converter for large-scale renewable energy collection applications are studied, and it is pointed out that the DC/DC converter should have the characteristics of high voltage, high voltage gain, large capacity, and unidirectional power flow [11].…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic Power Plant Collection and Connection to HVDC Grid with High Voltage DC/DC Converter

Huang

Wang

et al. 2021

Electronics

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Photovoltaic (PV) power plant collection and connection to a high voltage direct current (HVDC) grid has many advantages. Compared with the traditional AC collection and grid-connection scheme, it can reduce the power conversion links and improve the system efficiency. As one of the most important devices in the application of a PV HVDC collection and grid-connection system, a high voltage, large capacity, high step-up ratio DC/DC converter is the critical technology. A DC/DC converter scheme based on a boost full bridge isolated power module cascaded in input parallel output series (IPOS) structure is proposed to meet the technical requirements of PV power conversion with high voltage, large capacity, and high step-up ratio. The operation mode of the power module is analyzed, the soft switching method is proposed, and the constraint to realize the soft switching of the power module is deduced. Aiming to resolve the problem of multi-module voltage and current equalization in a cascaded DC/DC converter, a distributed module equalization control strategy is proposed to realize the reliable operation of a power module and converter. A 5 kV/80 kW standard power module is developed, the DC/DC converter experimental platform is built, and the proposed system scheme and control strategy are verified by experiments. Based on a 14-power module input parallel output series connection, a ±30 kV/1 MW PV DC/DC converter is developed, a ±30 kV PV HVDC collection and grid-connection demonstration system is established, and the experimental test is completed to realize the stable operation of the system.

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A Medium-Voltage DC-Collection Grid for Large-Scale PV Power Plants With Interleaved Modular Multilevel Converter

Cited by 38 publications

References 12 publications

Power Electronics Technology for Large-Scale Renewable Energy Generation

Power Electronics Technology for Large-Scale Renewable Energy Generation

A Novel Modular Multilevel Converter Based on Interleaved Half-Bridge Submodules

Photovoltaic Power Plant Collection and Connection to HVDC Grid with High Voltage DC/DC Converter

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