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Integrating a Single Z-Source Network with a Modular Multilevel Converter for Voltage Boosting (2019)
Conference Proceeding
Khera, F. A., Wheeler, P. W., & Klumpner, C. (2019). Integrating a Single Z-Source Network with a Modular Multilevel Converter for Voltage Boosting

This paper proposes the integration of a Z-source network with the modular multilevel converter (MMC) to add voltage boosting capability to a voltage step down converter. To limit the increase in complexity, the proposed Z-source modular multilevel c... Read More about Integrating a Single Z-Source Network with a Modular Multilevel Converter for Voltage Boosting.

Predictive Voltage Control Operating at Fixed Switching Frequency of a Neutral-Point Clamped Converter (2019)
Conference Proceeding
Herrera, F., Cárdenas, R., Rivera, M., Riveros, J. A., & Wheeler, P. (2019). Predictive Voltage Control Operating at Fixed Switching Frequency of a Neutral-Point Clamped Converter

Uninterruptible power supply units are system formed by power electronics converters to supply sinusoidal voltages to feed critical loads. In this paper, a fixed switching frequency model predictive control strategy is presented for the control of th... Read More about Predictive Voltage Control Operating at Fixed Switching Frequency of a Neutral-Point Clamped Converter.

Modulated Model Predictive Current Control for PMSM Operating With Three-level NPC Inverter (2019)
Conference Proceeding
Wang, Q., Rivera, M., Riveros, J. A., & Wheeler, P. (2019). Modulated Model Predictive Current Control for PMSM Operating With Three-level NPC Inverter

In finite control set model predictive control (FCS-MPC) strategy only one basic voltage vector is to be selected in per periodic time, which causes big current ripple as well as the torque ripple of permanent magnet synchronous motor (PMSM). To solv... Read More about Modulated Model Predictive Current Control for PMSM Operating With Three-level NPC Inverter.

Technique for Processing of Continuous Carbon Fibre Reinforced PEEK for Fused Filament Fabrication (2019)
Conference Proceeding
Pu, J., Saleh, E., Ashcroft, I., & Jones, A. (2019). Technique for Processing of Continuous Carbon Fibre Reinforced PEEK for Fused Filament Fabrication

3D printing of light-weight and mechanically-strong structures facilitates several applications. 3D printing of continuous carbon fibre reinforced polyetheretherketone (PEEK) presents exciting possibilities as the high stiffness and strength of the h... Read More about Technique for Processing of Continuous Carbon Fibre Reinforced PEEK for Fused Filament Fabrication.

Implementation of Predictive Control in a Three-Phase Neutral Point Clamped Inverter (2019)
Conference Proceeding
Perez-Guzman, R. E., Herrera, F., Rivera, M., Riveros, J., & Wheeler, P. W. (2019). Implementation of Predictive Control in a Three-Phase Neutral Point Clamped Inverter. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies (1-6). https://doi.org/10.1109/CHILECON47746.2019.8987536

In recent years, multilevel converters have established themselves as an efficient technology for the conversion of medium and high power. This research presents a NPC multilevel inverter topology, using two new control strategies: classical predicti... Read More about Implementation of Predictive Control in a Three-Phase Neutral Point Clamped Inverter.

Direct Power Control of Modular Multilevel Matrix Converter for Flexible AC Transmission System Applications (2019)
Conference Proceeding
Wheeler, P., Duran, A., Rojas, F., Diaz, M., & Ibaceta, E. (2019). Direct Power Control of Modular Multilevel Matrix Converter for Flexible AC Transmission System Applications. In 2019 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON) (1-6). https://doi.org/10.1109/CHILECON47746.2019.8988098

The Modular Multilevel Matrix Converter (M3C) has been proposed as an appropriate alternative for high-power machines due to characteristics such as modularity, medium-voltage operation, high power quality and reliability. However, complex control sy... Read More about Direct Power Control of Modular Multilevel Matrix Converter for Flexible AC Transmission System Applications.

Predictive Control Strategies in Power Converters (2019)
Conference Proceeding
Perez-Guzman, R. E., Rivera, M., & Wheeler, P. W. (2019). Predictive Control Strategies in Power Converters. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies ( 1-6). https://doi.org/10.1109/CHILECON47746.2019.8987539

Model-based predictive control (MPC) is an attractive solution for controlling power converters. In this article the most recent investigations related to predictive control are addressed and the solutions proposed by the researchers are shown, illus... Read More about Predictive Control Strategies in Power Converters.

Present and Future of the Chilean Electrical Grid (2019)
Conference Proceeding
Diaz, F., Rivera, M., Chavez, H., & Wheeler, P. (2019). Present and Future of the Chilean Electrical Grid. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies (1-6). https://doi.org/10.1109/CHILECON47746.2019.8987663

This paper presents a description of the current reality of the Chilean electricity sector and its future. The vision and its advancements in Chile are matter of observation to develop a clearer picture for maintaining and increasing the penetration... Read More about Present and Future of the Chilean Electrical Grid.

Weighting Factor Design in Model Predictive Control for Power Converters (2019)
Conference Proceeding
Perez-Guzman, R. E., Rivera, M., & Wheeler, P. W. (2019). Weighting Factor Design in Model Predictive Control for Power Converters. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies. https://doi.org/10.1109/CHILECON47746.2019.8988109

Model-based predictive control is an important multi-objective control strategy in power converters, but it must be properly designed. This research shows different alternatives to improve the cost function in model-based predictive control. For this... Read More about Weighting Factor Design in Model Predictive Control for Power Converters.

Architectures for Microgrids Interconnection (2019)
Conference Proceeding
Diaz, F., Rivera, M., & Wheeler, P. (2019). Architectures for Microgrids Interconnection. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies (1-6). https://doi.org/10.1109/CHILECON47746.2019.8988091

Progress requires greater global energy interconnection. This paper presents an overview of the topologies and control techniques applied to microgrids, by means of an updated bibliographic research and the most relevant articles on the use of power... Read More about Architectures for Microgrids Interconnection.

Active and Reactive Power Control based on an Inner Predictive Voltage Control Loop for AC generation systems with Direct Matrix Converter (2019)
Conference Proceeding
Toledo, S., Rivera, M., Wheeler, P., Dragicevic, T., Caballero, D., Gregor, R., …Gavilan, F. (2019). Active and Reactive Power Control based on an Inner Predictive Voltage Control Loop for AC generation systems with Direct Matrix Converter. In 2019 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC) (1-6). https://doi.org/10.1109/ROPEC48299.2019.9057037

In order to satisfied the growing electrical energy demand around the world, renewable energy generation systems under distributed generation frame emerges as a plausible solution. In this context wind and micro-hydro generation systems consist of re... Read More about Active and Reactive Power Control based on an Inner Predictive Voltage Control Loop for AC generation systems with Direct Matrix Converter.

Wind Energy Development and Technology in the World: A Brief Overview (2019)
Conference Proceeding
Elizondo, J. L., Rivera, M., & Wheeler, P. (2019). Wind Energy Development and Technology in the World: A Brief Overview. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies (1-5). https://doi.org/10.1109/CHILECON47746.2019.8987714

A brief overview of wind energy 2018 market status with short- and long-term projections will be presented, as well as the wind turbine technologies and market share. Furthermore, clean energy goals from the governments of Denmark, Mexico and Chile w... Read More about Wind Energy Development and Technology in the World: A Brief Overview.

The Voltage Source Inverter (2019)
Conference Proceeding
Gutierrez, R., Rivera, M., & Wheeler, P. (2019). The Voltage Source Inverter. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies (1-4). https://doi.org/10.1109/CHILECON47746.2019.8988056

This paper presents the Voltage Source Inverter. On this paper it will be discussed its topology, mathematical model, switching states and the characteristic curves of the inverter. Moreover, the authors will analyze the concept of “dead time”, aimin... Read More about The Voltage Source Inverter.

Model Predictive Control in Three-Phase Inverters (2019)
Conference Proceeding
Perez-Guzman, R. E., Rivera, M., Vicencio, N., & Wheeler, P. W. (2019). Model Predictive Control in Three-Phase Inverters. In IEEE Chilean Conference on Electrical, Electronics Engineering, Information and Communication Technologies (1-6). https://doi.org/10.1109/CHILECON47746.2019.8987470

Model-based predictive control is a recent alternative to improve the quality of the output in power converters. In this research, predictive current control is implemented in a voltage source inverter, operating at a variable switching frequency and... Read More about Model Predictive Control in Three-Phase Inverters.

Predictive Voltage Control of the Direct Matrix Converter applied to Grid Current Injection (2019)
Conference Proceeding
Toledo, S., Rivera, M., Dragicevic, T., Caballero, D., Wheeler, P., & Gregor, R. (2020). Predictive Voltage Control of the Direct Matrix Converter applied to Grid Current Injection. In 2019 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON)https://doi.org/10.1109/CHILECON47746.2019.8987518

Predictive control applied to direct matrix converter provide a feasible option to control the output voltage of a generation system with good performance. In this work a predictive voltage control strategy is proposed as the inner loop control of an... Read More about Predictive Voltage Control of the Direct Matrix Converter applied to Grid Current Injection.

Exploring Machine Learning Approaches for Classifying Mental Workload using fNIRS Data from HCI Tasks (2019)
Conference Proceeding
Benerradi, J., Maior, H. A., Marinescu, A., Clos, J., & Wilson, M. L. (2019). Exploring Machine Learning Approaches for Classifying Mental Workload using fNIRS Data from HCI Tasks. In Proceedings of the Halfway to the Future Symposium 2019. https://doi.org/10.1145/3363384.3363392

Functional Near-Infrared Spectroscopy (fNIRS) has shown promise for being potentially more suitable (than e.g. EEG) for brain-based Human Computer Interaction (HCI). While some machine learning approaches have been used in prior HCI work, this paper... Read More about Exploring Machine Learning Approaches for Classifying Mental Workload using fNIRS Data from HCI Tasks.

Cognitive group awareness tools: Versatile devices to guide learners towards discrepancies (2019)
Conference Proceeding
Schnaubert, L., Heimbuch, S., Erkens, M., & Bodemer, D. (2019). Cognitive group awareness tools: Versatile devices to guide learners towards discrepancies. In 27th International Conference on Computers in Education conference proceedings (158-164)

Collaborative practices cover a vast variety of contexts and educational goals. Despite these differences, most means of support draw on between- and within-learner discrepancies as driving forces of individual and collaborative learning. These discr... Read More about Cognitive group awareness tools: Versatile devices to guide learners towards discrepancies.

Group awareness information to support academic help-seeking (2019)
Conference Proceeding
Schlusche, C., Schnaubert, L., & Bodemer, D. (2019). Group awareness information to support academic help-seeking. In 27th International Conference on Computers in Education. Conference Proceedings Volume 1 (131-140)

Students are expected to deal with complex learning material, that regularly challenges their learning processes especially in the first semester. When students ask peers for explanations, they apply a functional learning strategy, known as academic... Read More about Group awareness information to support academic help-seeking.

Information Retrieval for Evidence-Based Policy Making Applied to Lifelong Learning (2019)
Conference Proceeding
Clos, J., Qu, R., & Atkin, J. (2019). Information Retrieval for Evidence-Based Policy Making Applied to Lifelong Learning. In Artificial Intelligence XXXVI (487-493). https://doi.org/10.1007/978-3-030-34885-4_41

© 2019, Springer Nature Switzerland AG. Policy making involves an extensive research phase during which existing policies which are similar to the one under development need to be retrieved and analysed. This phase is time-consuming for the following... Read More about Information Retrieval for Evidence-Based Policy Making Applied to Lifelong Learning.