The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Javier Echeverria - One of the best experts on this subject based on the ideXlab platform.
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dc dc mmc for hvdc grid interface of utility scale photovoltaic conversion systems
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Christian A Rojas, Samir Kouro, Marcelo A Perez, Javier EcheverriaAbstract:This paper explores a utility-scale photovoltaic (PV) plant configuration based on a dc–dc stage interfaced directly to a modular multilevel converter (MMC) used for an HVdc power station. Since PV systems are dc by nature, the proposed solution has several advantages, such as full dc Operation and step-up transformers avoidance with modular and reliable configuration. The contributions of this paper are the experimental validation of the proposed utility-scale configuration, while the conventional modulation stage has been further enhanced by including an adaptive phase-shifted modulation allowing improved voltage and current waveforms injected to dc grid under unbalanced power String Operation. The enhanced performance is obtained by reducing the carrier frequency component of the converter voltage, generating an improved voltage ripple. Finally, experimental validation during steady-state and dynamic Operation are presented to illustrate the behavior of the dc–dc MMC converter managed by the proposed modulation and control scheme.
Christian A Rojas - One of the best experts on this subject based on the ideXlab platform.
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dc dc mmc for hvdc grid interface of utility scale photovoltaic conversion systems
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Christian A Rojas, Samir Kouro, Marcelo A Perez, Javier EcheverriaAbstract:This paper explores a utility-scale photovoltaic (PV) plant configuration based on a dc–dc stage interfaced directly to a modular multilevel converter (MMC) used for an HVdc power station. Since PV systems are dc by nature, the proposed solution has several advantages, such as full dc Operation and step-up transformers avoidance with modular and reliable configuration. The contributions of this paper are the experimental validation of the proposed utility-scale configuration, while the conventional modulation stage has been further enhanced by including an adaptive phase-shifted modulation allowing improved voltage and current waveforms injected to dc grid under unbalanced power String Operation. The enhanced performance is obtained by reducing the carrier frequency component of the converter voltage, generating an improved voltage ripple. Finally, experimental validation during steady-state and dynamic Operation are presented to illustrate the behavior of the dc–dc MMC converter managed by the proposed modulation and control scheme.
Samir Kouro - One of the best experts on this subject based on the ideXlab platform.
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dc dc mmc for hvdc grid interface of utility scale photovoltaic conversion systems
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Christian A Rojas, Samir Kouro, Marcelo A Perez, Javier EcheverriaAbstract:This paper explores a utility-scale photovoltaic (PV) plant configuration based on a dc–dc stage interfaced directly to a modular multilevel converter (MMC) used for an HVdc power station. Since PV systems are dc by nature, the proposed solution has several advantages, such as full dc Operation and step-up transformers avoidance with modular and reliable configuration. The contributions of this paper are the experimental validation of the proposed utility-scale configuration, while the conventional modulation stage has been further enhanced by including an adaptive phase-shifted modulation allowing improved voltage and current waveforms injected to dc grid under unbalanced power String Operation. The enhanced performance is obtained by reducing the carrier frequency component of the converter voltage, generating an improved voltage ripple. Finally, experimental validation during steady-state and dynamic Operation are presented to illustrate the behavior of the dc–dc MMC converter managed by the proposed modulation and control scheme.
Marcelo A Perez - One of the best experts on this subject based on the ideXlab platform.
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dc dc mmc for hvdc grid interface of utility scale photovoltaic conversion systems
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Christian A Rojas, Samir Kouro, Marcelo A Perez, Javier EcheverriaAbstract:This paper explores a utility-scale photovoltaic (PV) plant configuration based on a dc–dc stage interfaced directly to a modular multilevel converter (MMC) used for an HVdc power station. Since PV systems are dc by nature, the proposed solution has several advantages, such as full dc Operation and step-up transformers avoidance with modular and reliable configuration. The contributions of this paper are the experimental validation of the proposed utility-scale configuration, while the conventional modulation stage has been further enhanced by including an adaptive phase-shifted modulation allowing improved voltage and current waveforms injected to dc grid under unbalanced power String Operation. The enhanced performance is obtained by reducing the carrier frequency component of the converter voltage, generating an improved voltage ripple. Finally, experimental validation during steady-state and dynamic Operation are presented to illustrate the behavior of the dc–dc MMC converter managed by the proposed modulation and control scheme.
Tang Xiao - One of the best experts on this subject based on the ideXlab platform.
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String Operation in national diving team s training planning software
Journal of Nanjing Institute of Physical Education, 2012Co-Authors: Tang XiaoAbstract:Objective: To develop a diving planning software according to coaches' Operation custom for national diving team.Method: Using C# String Operation techniques such as String splitting,joining,String array Operation and regular expression to achieve displaying,calculation,saving and printing functions.Result: Proper String Operation can make software clear,convenient and stable.Conclusion: Operation of basic String Operation,Regular expression,RichTextBox and PrintDocument in this research can be used in other sports softwares.
