LAPSE:2019.1515
Published Article
LAPSE:2019.1515
A New Backward Euler Stabilized Optimum Controller for NPC Back-to-Back Five Level Converters
Miguel Chaves, José Fernando Silva, Sónia Ferreira Pinto, Elmano Margato, João Santana
December 10, 2019
This paper presents a backward Euler stabilized-based control strategy applied to a neutral point clamped (NPC) back-to-back connected five level converters. A generalized method is used to obtain the back-to-back NPC converter system model. The backward Euler stabilized-based control strategy uses one set of calculations to compute the optimum voltage vector needed to reach the references and to balance the voltage of the DC-bus capacitors. The output voltage vector is selected using a modified cost functional that includes variable tracking errors in the functional weights, whereas in classic approaches, the weights are considered constant. The proposed modified cost functional enables AC current tracking and DC-bus voltage balancing in a wide range of operating conditions. The paper main contributions are: (i) a backward Euler stabilized-based control strategy applied to a double, back-to-back connected, five level NPC converter; (ii) the use of cost functional weight varying as a function of the controlled variable tracking errors to enforce the controlled variables and to balance the DC capacitor voltages; and (iii) the demonstration of system feasibility for this type of converter topology and control strategy, ensuring a high enough computational efficiency and extending the modulation index from 0.6 to 0.93. Experimental results are presented using a prototype of a five level NPC back-to-back converter.
Keywords
back-to-back converters, backward Euler based control, capacitors voltage balancing, multilevel converters
Suggested Citation
Chaves M, Silva JF, Pinto SF, Margato E, Santana J. A New Backward Euler Stabilized Optimum Controller for NPC Back-to-Back Five Level Converters. (2019). LAPSE:2019.1515
Author Affiliations
Chaves M: Instituto Superior de Engenharia de Lisboa (ISEL), Instituto Politécnico de Lisboa, Rua Conselheiro Emídio Navarro 1, Lisboa 1959-007, Portugal; Instituto de Engenharia de Sistemas e Computadores, Investigação e Desenvolvimento em Lisboa (INESC-ID), R
Silva JF: Departamento de Engenharia Eletrotécnica e de Computadores, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais 1, Lisboa 1049-001, Portugal; Instituto de Engenharia de Sistemas e Computadores, Investigação e Desenvolvimento em Lisboa (INESC-ID), [ORCID]
Pinto SF: Departamento de Engenharia Eletrotécnica e de Computadores, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais 1, Lisboa 1049-001, Portugal; Instituto de Engenharia de Sistemas e Computadores, Investigação e Desenvolvimento em Lisboa (INESC-ID), [ORCID]
Margato E: Instituto Superior de Engenharia de Lisboa (ISEL), Instituto Politécnico de Lisboa, Rua Conselheiro Emídio Navarro 1, Lisboa 1959-007, Portugal; Instituto de Engenharia de Sistemas e Computadores, Investigação e Desenvolvimento em Lisboa (INESC-ID), R
Santana J: Departamento de Engenharia Eletrotécnica e de Computadores, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais 1, Lisboa 1049-001, Portugal; Instituto de Engenharia de Sistemas e Computadores, Investigação e Desenvolvimento em Lisboa (INESC-ID),
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Journal Name
Energies
Volume
10
Issue
6
Article Number
E735
Year
2017
Publication Date
2017-05-23
Published Version
ISSN
1996-1073
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PII: en10060735, Publication Type: Journal Article
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LAPSE:2019.1515
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doi:10.3390/en10060735
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Dec 10, 2019
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Calvin Tsay
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