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\n\n \n \n \n \n \n \n An MPPT Strategy Based on a Surface-Based Polynomial Fitting for Solar Photovoltaic Systems Using Real-Time Hardware.\n \n \n \n \n\n\n \n González-Castaño, C.; Lorente-Leyva, L., L.; Muñoz, J.; Restrepo, C.; and Peluffo-Ordóñez, D., H.\n\n\n \n\n\n\n
Electronics, 10(2): 206. 1 2021.\n
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@article{\n title = {An MPPT Strategy Based on a Surface-Based Polynomial Fitting for Solar Photovoltaic Systems Using Real-Time Hardware},\n type = {article},\n year = {2021},\n pages = {206},\n volume = {10},\n websites = {https://www.mdpi.com/2079-9292/10/2/206},\n month = {1},\n day = {17},\n id = {cb0d4ddf-aaf1-3f94-95bb-258f61fdcd49},\n created = {2022-02-02T04:43:00.821Z},\n file_attached = {false},\n profile_id = {aba9653c-d139-3f95-aad8-969c487ed2f3},\n group_id = {64189d67-c00c-39f1-bc7a-97ee9a2aac66},\n last_modified = {2022-02-02T04:43:00.821Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {Gonzalez-Castano2021},\n private_publication = {false},\n abstract = {This paper presents an optimal design of a surface-based polynomial fitting for tracking the maximum power point (MPPT) of a photovoltaic (PV) system, here named surface-based polynomial fitting (MPPT-SPF). The procedure of the proposed MPPT-SPF strategy is based on a polynomial model to characterize data from the PV module with a global fit. The advantage of using polynomials is that they provide a good fit within a predefined data range even though they can diverge greatly from that range. The MPPT-SPF strategy is integrated with a DC-DC boost converter to verify its performance and its interaction with different control loops. Therefore, the MPPT strategy is applied to the reference outer PI control loop, which in turn provides the current reference to the inner current loop based on a discrete-time sliding current control. A real-time and high-speed simulator (PLECS RT Box 1) and a digital signal controller (DSC) are used to implement the hardware-in-the-loop system to obtain the results. The proposed strategy does not have a high computational cost and can be implemented in a commercial low-cost DSC (TI 28069M). The proposed MPPT strategy is compared with a conventional perturb and observe method to prove its effectiveness under demanding tests.},\n bibtype = {article},\n author = {González-Castaño, Catalina and Lorente-Leyva, Leandro L. and Muñoz, Javier and Restrepo, Carlos and Peluffo-Ordóñez, Diego H.},\n doi = {10.3390/electronics10020206},\n journal = {Electronics},\n number = {2}\n}\n
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\n This paper presents an optimal design of a surface-based polynomial fitting for tracking the maximum power point (MPPT) of a photovoltaic (PV) system, here named surface-based polynomial fitting (MPPT-SPF). The procedure of the proposed MPPT-SPF strategy is based on a polynomial model to characterize data from the PV module with a global fit. The advantage of using polynomials is that they provide a good fit within a predefined data range even though they can diverge greatly from that range. The MPPT-SPF strategy is integrated with a DC-DC boost converter to verify its performance and its interaction with different control loops. Therefore, the MPPT strategy is applied to the reference outer PI control loop, which in turn provides the current reference to the inner current loop based on a discrete-time sliding current control. A real-time and high-speed simulator (PLECS RT Box 1) and a digital signal controller (DSC) are used to implement the hardware-in-the-loop system to obtain the results. The proposed strategy does not have a high computational cost and can be implemented in a commercial low-cost DSC (TI 28069M). The proposed MPPT strategy is compared with a conventional perturb and observe method to prove its effectiveness under demanding tests.\n
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\n\n \n \n \n \n \n \n A Dynamic Programming Approach for Power Curtailment Decision Making on PV Systems.\n \n \n \n \n\n\n \n Fernández-Fernández, Y.; Lorente-Leyva, L., L.; Peluffo-Ordóñez, D., H.; and Álvarez, E., N., C.\n\n\n \n\n\n\n In Bindhu, V.; Tavares, J., M., R., S.; Boulogeorgos, A., A.; and Vuppalapati, C., editor(s),
International Conference on Communication, Computing and Electronics Systems, pages 77-86, 2021. Springer Singapore\n
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@inproceedings{\n title = {A Dynamic Programming Approach for Power Curtailment Decision Making on PV Systems},\n type = {inproceedings},\n year = {2021},\n pages = {77-86},\n websites = {https://link.springer.com/chapter/10.1007/978-981-33-4909-4_6},\n publisher = {Springer Singapore},\n city = {Singapore},\n id = {1ff9c025-c7e2-376b-86a5-3ae939867e7d},\n created = {2022-02-02T04:43:01.056Z},\n file_attached = {false},\n profile_id = {aba9653c-d139-3f95-aad8-969c487ed2f3},\n group_id = {64189d67-c00c-39f1-bc7a-97ee9a2aac66},\n last_modified = {2022-02-02T04:43:01.056Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {10.1007/978-981-33-4909-4_6},\n source_type = {inproceedings},\n private_publication = {false},\n abstract = {The new grid codes for large-scale photovoltaic power plants require power curtailment despite the variation of solar irradiance. This power curtailment is been developed considering one reference of active power. However, this value is chosen according to the demand, but it is not considering other aspects as solar irradiance or cloudiness. Therefore, this article presents a novel approach to tackle this issue. For this, stochastic dynamic programming is considered to optimize the decision of the power reference every hour considering the solar irradiance and cloudiness during different stages of the day. The results obtained are compared with the performance of the photovoltaic power plant, and it is a referential approach that uses the maximum power point tracking algorithms for the construction of referential power intervals over longer time intervals.},\n bibtype = {inproceedings},\n author = {Fernández-Fernández, Yasmany and Lorente-Leyva, Leandro L and Peluffo-Ordóñez, Diego H and Álvarez, Elia N Cabrera},\n editor = {Bindhu, V and Tavares, João Manuel R S and Boulogeorgos, Alexandros-Apostolos A and Vuppalapati, Chandrasekar},\n booktitle = {International Conference on Communication, Computing and Electronics Systems}\n}\n
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\n The new grid codes for large-scale photovoltaic power plants require power curtailment despite the variation of solar irradiance. This power curtailment is been developed considering one reference of active power. However, this value is chosen according to the demand, but it is not considering other aspects as solar irradiance or cloudiness. Therefore, this article presents a novel approach to tackle this issue. For this, stochastic dynamic programming is considered to optimize the decision of the power reference every hour considering the solar irradiance and cloudiness during different stages of the day. The results obtained are compared with the performance of the photovoltaic power plant, and it is a referential approach that uses the maximum power point tracking algorithms for the construction of referential power intervals over longer time intervals.\n
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\n\n \n \n \n \n \n \n Evaluation of Working Temperature in Wind Turbine Bearings by Simulation of Lubricant Level.\n \n \n \n \n\n\n \n Feliciano, Y., A.; Varela, C., A., T.; Guativas, J., A., V.; Lorente-leyva, L., L.; and Peluffo-ordóñez, D., H.\n\n\n \n\n\n\n
IIETA, 16(1): 99-104. 2021.\n
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@article{\n title = {Evaluation of Working Temperature in Wind Turbine Bearings by Simulation of Lubricant Level},\n type = {article},\n year = {2021},\n keywords = {bearing,cfd,heat,lubricant,simulation,wind turbines,working temperature},\n pages = {99-104},\n volume = {16},\n websites = {http://www.iieta.org/journals/ijdne/paper/10.18280/ijdne.160113},\n id = {0c7430d1-085c-3690-a00b-8aa24253a277},\n created = {2022-02-02T04:43:01.311Z},\n file_attached = {false},\n profile_id = {aba9653c-d139-3f95-aad8-969c487ed2f3},\n group_id = {64189d67-c00c-39f1-bc7a-97ee9a2aac66},\n last_modified = {2022-02-02T04:43:01.311Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {After studies related to the technical state and behavior of the temperatures manifested by the bearings of the generators that make up the Goldwind wind turbines models S50-750, installed in the Gibara II Wind Farm (PE). It was identified and validated as a tool that enables early diagnosis of anomalous bearing behaviors, SolidWorks (SW) computer-aided design and engineering software (CAD-CAE) and the Flow Simulation add-on. Since it allows studies based on the computational fluid dynamics (CFD), of the temperatures that are manifested in the lubricant during the different working regimes of the generator. The studies carried out evaluated the environmental conditions of exploitation in Cuba. It works on obtaining and predicting the values of the thermal state using the principles and methods for the calculation of heat transfer, the forecast statistics apply. The research supports its theories and postulates in a sample of 6 installed equipment, from China, for it had a historical database that collects temperature measurements in different working conditions which allowed to establish correlation between theoretical predictions and real behaviors.},\n bibtype = {article},\n author = {Feliciano, Yorley Arbella and Varela, Carlos A Trinchet and Guativas, Javier A Vargas and Lorente-leyva, Leandro L and Peluffo-ordóñez, Diego H},\n journal = {IIETA},\n number = {1}\n}\n
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\n After studies related to the technical state and behavior of the temperatures manifested by the bearings of the generators that make up the Goldwind wind turbines models S50-750, installed in the Gibara II Wind Farm (PE). It was identified and validated as a tool that enables early diagnosis of anomalous bearing behaviors, SolidWorks (SW) computer-aided design and engineering software (CAD-CAE) and the Flow Simulation add-on. Since it allows studies based on the computational fluid dynamics (CFD), of the temperatures that are manifested in the lubricant during the different working regimes of the generator. The studies carried out evaluated the environmental conditions of exploitation in Cuba. It works on obtaining and predicting the values of the thermal state using the principles and methods for the calculation of heat transfer, the forecast statistics apply. The research supports its theories and postulates in a sample of 6 installed equipment, from China, for it had a historical database that collects temperature measurements in different working conditions which allowed to establish correlation between theoretical predictions and real behaviors.\n
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\n\n \n \n \n \n \n \n A Fast-Tracking Hybrid MPPT Based on Surface-Based Polynomial Fitting and P&O Methods for Solar PV under Partial Shaded Conditions.\n \n \n \n \n\n\n \n González-Castaño, C.; Restrepo, C.; Revelo-Fuelagán, J.; Lorente-Leyva, L., L.; and Peluffo-Ordóñez, D., H.\n\n\n \n\n\n\n
Mathematics, 9(21). 2021.\n
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@article{\n title = {A Fast-Tracking Hybrid MPPT Based on Surface-Based Polynomial Fitting and P&O Methods for Solar PV under Partial Shaded Conditions},\n type = {article},\n year = {2021},\n volume = {9},\n websites = {https://www.mdpi.com/2227-7390/9/21/2732},\n id = {550d0f07-1d43-35e9-8b44-fc5687474238},\n created = {2022-02-02T04:43:01.668Z},\n file_attached = {false},\n profile_id = {aba9653c-d139-3f95-aad8-969c487ed2f3},\n group_id = {64189d67-c00c-39f1-bc7a-97ee9a2aac66},\n last_modified = {2022-02-02T04:43:01.668Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {math9212732},\n source_type = {article},\n private_publication = {false},\n abstract = {The efficiency of photovoltaic (PV) systems depends directly on solar irradiation, so drastic variations in solar exposure will undoubtedly move its maximum power point (MPP). Furthermore, the presence of partial shading conditions (PSCs) generates local maximum power points (LMPPs) and one global maximum power point (GMPP) in the P-V characteristic curve. Therefore, a proper maximum power point tracking (MPPT) technique is crucial to increase PV system efficiency. There are classical, intelligent, optimal, and hybrid MPPT techniques; this paper presents a novel hybrid MPPT technique that combines Surface-Based Polynomial Fitting (SPF) and Perturbation and Observation (P&O) for solar PV generation under PSCs. The development of the experimental PV system has two stages: (i) Modeling the PV array with the DC-DC boost converter using a real-time and high-speed simulator (PLECS RT Box), (ii) and implementing the proposed GMPPT algorithm with the double-loop controller of the DC-DC boost converter in a commercial low-priced digital signal controller (DSC). According to the simulation and the experimental results, the suggested hybrid algorithm is effective at tracking the GMPP under both uniform and nonuniform irradiance conditions in six scenarios: (i) system start-up, (ii) uniform irradiance variations, (iii) sharp change of the (PSCs), (iv) multiple peaks in the P-V characteristic, (v) dark cloud passing, and (vi) light cloud passing. Finally, the experimental results—through the standard errors and the mean power tracked and tracking factor scores—proved that the proposed hybrid SPF-P&O MPPT technique reaches the convergence to GMPP faster than benchmark approaches when dealing with PSCs.},\n bibtype = {article},\n author = {González-Castaño, Catalina and Restrepo, Carlos and Revelo-Fuelagán, Javier and Lorente-Leyva, Leandro L and Peluffo-Ordóñez, Diego H},\n doi = {10.3390/math9212732},\n journal = {Mathematics},\n number = {21}\n}\n
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\n The efficiency of photovoltaic (PV) systems depends directly on solar irradiation, so drastic variations in solar exposure will undoubtedly move its maximum power point (MPP). Furthermore, the presence of partial shading conditions (PSCs) generates local maximum power points (LMPPs) and one global maximum power point (GMPP) in the P-V characteristic curve. Therefore, a proper maximum power point tracking (MPPT) technique is crucial to increase PV system efficiency. There are classical, intelligent, optimal, and hybrid MPPT techniques; this paper presents a novel hybrid MPPT technique that combines Surface-Based Polynomial Fitting (SPF) and Perturbation and Observation (P&O) for solar PV generation under PSCs. The development of the experimental PV system has two stages: (i) Modeling the PV array with the DC-DC boost converter using a real-time and high-speed simulator (PLECS RT Box), (ii) and implementing the proposed GMPPT algorithm with the double-loop controller of the DC-DC boost converter in a commercial low-priced digital signal controller (DSC). According to the simulation and the experimental results, the suggested hybrid algorithm is effective at tracking the GMPP under both uniform and nonuniform irradiance conditions in six scenarios: (i) system start-up, (ii) uniform irradiance variations, (iii) sharp change of the (PSCs), (iv) multiple peaks in the P-V characteristic, (v) dark cloud passing, and (vi) light cloud passing. Finally, the experimental results—through the standard errors and the mean power tracked and tracking factor scores—proved that the proposed hybrid SPF-P&O MPPT technique reaches the convergence to GMPP faster than benchmark approaches when dealing with PSCs.\n
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\n\n \n \n \n \n \n \n Dynamic Modeling of a Proton-Exchange Membrane Fuel Cell Using a Gaussian Approach.\n \n \n \n \n\n\n \n González-Castaño, C.; Lorente-Leyva, L., L.; Alpala, J.; Revelo-Fuelagán, J.; Peluffo-Ordóñez, D., H.; and Restrepo, C.\n\n\n \n\n\n\n
Membranes, 11(12). 2021.\n
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@article{\n title = {Dynamic Modeling of a Proton-Exchange Membrane Fuel Cell Using a Gaussian Approach},\n type = {article},\n year = {2021},\n volume = {11},\n websites = {https://www.mdpi.com/2077-0375/11/12/953},\n id = {47d8ba7f-5ab4-31e0-b7c6-50314e73a80f},\n created = {2022-02-02T04:43:01.936Z},\n file_attached = {false},\n profile_id = {aba9653c-d139-3f95-aad8-969c487ed2f3},\n group_id = {64189d67-c00c-39f1-bc7a-97ee9a2aac66},\n last_modified = {2022-02-02T04:43:01.936Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n citation_key = {membranes11120953},\n source_type = {article},\n private_publication = {false},\n abstract = {This paper proposes a Gaussian approach for the proton-exchange membrane fuel cell (PEMFC) model that estimates its voltage behavior from the operating current value. A multi-parametric Gaussian model and an unconstrained optimization formulation based on a conventional non-linear least squares optimizer is mainly considered. The model is tested using experimental data from the Ballard Nexa 1.2 kW fuel cell (FC). This methodology offers a promising approach for static and current-voltage, characteristic of the three regions of operation. A statistical study is developed to evaluate the effectiveness and superiority of the proposed FC Gaussian model compared with the Diffusive Global model and the Evolution Strategy. In addition, an approximation to the exponential function for a Gaussian model simplification can be used in systems that require real-time emulators or complex long-time simulations.},\n bibtype = {article},\n author = {González-Castaño, Catalina and Lorente-Leyva, Leandro L and Alpala, Janeth and Revelo-Fuelagán, Javier and Peluffo-Ordóñez, Diego H and Restrepo, Carlos},\n doi = {10.3390/membranes11120953},\n journal = {Membranes},\n number = {12}\n}\n
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\n This paper proposes a Gaussian approach for the proton-exchange membrane fuel cell (PEMFC) model that estimates its voltage behavior from the operating current value. A multi-parametric Gaussian model and an unconstrained optimization formulation based on a conventional non-linear least squares optimizer is mainly considered. The model is tested using experimental data from the Ballard Nexa 1.2 kW fuel cell (FC). This methodology offers a promising approach for static and current-voltage, characteristic of the three regions of operation. A statistical study is developed to evaluate the effectiveness and superiority of the proposed FC Gaussian model compared with the Diffusive Global model and the Evolution Strategy. In addition, an approximation to the exponential function for a Gaussian model simplification can be used in systems that require real-time emulators or complex long-time simulations.\n
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\n\n \n \n \n \n \n \n Implementation of a two-loop digital control for high voltage DC-DC buck-boost converter with coupled inductor.\n \n \n \n \n\n\n \n González-Castaño, C.; Madrid, E.; Naranajo, W.; Restrepo, C.; Revelo-Fuelagán, J.; and Peluffo-Ordoñez, D., H.\n\n\n \n\n\n\n In
2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics (COMPEL), pages 1-6, 2021. \n
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@inproceedings{\n title = {Implementation of a two-loop digital control for high voltage DC-DC buck-boost converter with coupled inductor},\n type = {inproceedings},\n year = {2021},\n pages = {1-6},\n websites = {https://ieeexplore.ieee.org/document/9645983},\n id = {83a5d4f1-7098-328d-86ff-9b20881b5336},\n created = {2022-02-02T04:43:11.656Z},\n file_attached = {false},\n profile_id = {aba9653c-d139-3f95-aad8-969c487ed2f3},\n group_id = {64189d67-c00c-39f1-bc7a-97ee9a2aac66},\n last_modified = {2022-02-02T04:43:11.656Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {false},\n hidden = {false},\n source_type = {INPROCEEDINGS},\n private_publication = {false},\n bibtype = {inproceedings},\n author = {González-Castaño, Catalina and Madrid, Emerson and Naranajo, Walter and Restrepo, Carlos and Revelo-Fuelagán, Javier and Peluffo-Ordoñez, Diego H},\n doi = {10.1109/COMPEL52922.2021.9645983},\n booktitle = {2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics (COMPEL)}\n}\n
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