Andrade Aguero, Ivan Eric
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Andrade Aguero, Ivan Eric
Nombre completo
Andrade Aguero, Ivan Eric
AfiliaciĆ³n principal
Email
ivan.andrade@umag.cl
ORCID
JerarquĆa acadĆ©mica
Prof. Asistente A
LĆnea de investigaciĆ³n
EnergĆa y Ambiente
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2 resultados
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PublicaciĆ³n DOI 10.1109/iecon48115.2021.9589910An HVDC inverter based on the Asymmetric Alternate Arm Converter with thyristor valves2021; ; Blasco-Gimenez, RamonThe Modular Multilevel Converter (MMC) is one of the most practical topologies for integration of renewable energy power plants into the grid, through submarine HVDC cables and HVDC lines. Nonetheless, the MMC requires significant large DC storage capacitors. This work addresses the recently introduced Asymmetric Alternate Arm Converter (A3C), a hybrid MMC topology which uses modular arms only on the lower side of the main converter whereas the upper side uses only standard ON-OFF valves. The A3C offers a significant reduction in DC energy storage requirements and in the number of modules. In addition, it offers a less restricted operation than the Alternate Arm Converter (A2C), in terms of operating over a wide range of AC to DC voltage ratio, and the possibility of achieving both nearly sinusoidal AC current and nearly constant DC current. The principle of operation of the A3C, but in the inverter mode and using thyristor-based director switches, is revisited here and a suitable control strategy to demonstrate its operation is developed. Emphasis is place on switching off the thyristor valves in a soft commutation fashion. The method requires two A3C operating in interleaving fashion on the DC bus. Proposals are verified through simulation studies.ScopusĀ© Citations 1 3 - Some of the metrics are blocked by yourconsent settings
PublicaciĆ³n DOI 10.1109/tla.2018.8789555The Asymmetric Alternate Arm Converter: A Compact Voltage Source Converter Design for HVDC2018-9; ; Pena, R.The Modular Multilevel Converter (MMC) has become one of the most practical topologies for integration of renewable energy power plants into the grid, through submarine HVDC cables and HVDC lines. Nonetheless, the MMC requires significant large DC storage capacitors to mitigate for large power, low frequency pulsations due to the single-phase like AC to DC conversion process in their arms. This work addresses the recently introduced Asymmetric Alternate Arm Converter, a hybride MMC topology which uses modular converter arms only on the lower side of the main converter whereas the upper side uses only standard ON-OFF valves topology. This converter is similar to the Alternate Arm Converter (AAC) but dispenses of the modules on the upper side and of the director switch on the lower side. Like the AAC, the Asymmetric AAC offers a significant reduction in DC energy storage requirements and in the number of modules. In addition, the Asymmetric AAC offers a less restricted operation than the AAC, in terms of operating over a wide range of AC to DC voltage ratio, and the possibility of achieving both distortion-free AC current and ripple-free DC current. The principle of operation of the Asymmetric AAC is revisited here and a suitable control strategy to demonstrate its operation is developed. In addition, requirements for energy storage, voltage and current rating of converter modules and converter losses are examined by means of simplified analyses. Proposals are verified through simulation studies and experiments conducted on a low power prototype having three H-bridge modules per arm. Results confirm good operation of the proposed converter and control scheme.ScopusĀ© Citations 4 2