Browsing NTNU Open by Author "Molinas Cabrera, Maria Marta"
Now showing items 1-20 of 126
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A Data-driven Approach to Grid Impedance : Identification for Impedance-based Stability Analysis under Different Frequency Ranges
Li, Chendan; Molinas Cabrera, Maria Marta; Fosso, Olav B; Qin, Nan; Zhu, Lin (Chapter, 2019)The instability caused by inappropriate damping design of grid-connected converters under specific grid impedance makes the grid impedance estimation a crucial issue. To guide the system controller design toward a stable ... -
A fully differential capacitively-coupled high CMRR low-power chopper amplifier for EEG dry electrodes
Habibzadeh Tonekabony Shad, Erwin; Molinas Cabrera, Maria Marta; Ytterdal, Trond (Journal article; Peer reviewed, 2020)The use of dry electrodes is increasing rapidly. Since their impedance is high, there is a high impedance node at the connecting node between the electrode and amplifier. This leads to absorb powerline signal and high CMRR ... -
A Gray-Box Method for Stability and Controller Parameter Estimation in HVDC-Connected Wind Farms Based on Nonparametric Impedance
Amin, Mohammad; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2019)Estimation of critical control parameters is a desirable tool feature for stability analysis and impedance shaping of high voltage dc (HVdc) connected wind farms. Accurate estimation of such parameters would be enabled by ... -
A meta-parameterized approach for the evaluation of semiconductor technologies - A comparison between SiC-MOSFET and Si-IGBT technologies
Barrera-Cardenas, Rene; Isobe, Takanori; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2018)This paper presents a meta-parameterized approach for the evaluation of Power Switch Modules (PSMs) in power converters. General models and parameters for the evaluation of power losses and volume of a PSM are presented. ... -
A Modified Sequence-Domain Impedance Definition and Its Equivalence to the dq-Domain Impedance Definition for the Stability Analysis of AC Power Electronic Systems
Rygg, Atle; Molinas Cabrera, Maria Marta; Cai, Xu; Chen, Zhang (Peer reviewed; Journal article, 2016)Representation of ac power systems by frequency-dependent impedance equivalents is an emerging technique in the dynamic analysis of power systems including power electronic converters. The technique has been applied for ... -
A Simple Procedure to Evaluate the Efficiency and Power Density of Power Conversion Topologies for Offshore Wind Turbines
Barrera-Cardenas, Rene Alexander; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2012)The prospective development of the offshore wind energy conversion system is mainly promoted by demand for higher efficiency and power density. This paper describes a simple procedure to calculate the efficiency and power ... -
Accurate aggregated modelling of wind farm systems in modified sequence domain for stability analysis
Zong, Haoxiang; Lyu, Jing; Cai, Xu; Zhang, Chen; Molinas Cabrera, Maria Marta; Rao, Fangquan (Peer reviewed; Journal article, 2019)With the wind power penetration rate continuously rising, a suitable wind farm model considering both accuracy and simplicity is required for power system stability analysis. To accomplish this goal, an accurate aggregated ... -
Analysis of Bifurcation Behaviors in MMC Connected to a Weak Grid
Haoxiang, Zong; Lyu, Jing; Xu, Cai; Molinas Cabrera, Maria Marta; Zhang, Chen; Renxing, Yang; Fangquan, Rao (Chapter, 2018)Conventional small-signal approaches present obvious advantages applied in analyzing closed-loop stability in power electronics systems. However, linearized models fall short of predicting any nonlinear behavior which means ... -
Analysis of Epileptic Activity Based on Brain Mapping of EEG Adaptive Time-Frequency Decomposition
Bueno-Lopez, Maximiliano; Muñoz-Gutiérrez, Pablo A.; Eduardo, Giraldo; Molinas Cabrera, Maria Marta (Chapter, 2018)The applications of Empirical Mode Decomposition (EMD) in Biomedical Signal analysis have increased and is common now to find publications that use EMD to identify behaviors in the brain or heart. EMD has shown excellent ... -
Analyzing the Recognition of Color Exposure and Imagined Color from EEG Signals
Torres-García, Alejandro Antonio; Molinas Cabrera, Maria Marta (Chapter, 2019)The most widely used visual brain-computer interfaces (BCIs) are based on flickering stimulators. It remains unclear whether a passive visual stimulator could be used. Colors are an integral part of everyday life. We ... -
Aplicación de la Transformada de Hilbert-Huang en el Análisis de Señales de Comunicación Satelital
Villanueva Maldonado, Juvenal; Bueno Lopez, Maximiliano; Rodriguez, Jorge Simon; Molinas Cabrera, Maria Marta; Flores Troncoso, Jorge; Mendez Monroy, Paul Erick (Journal article; Peer Reviewed, 2019)In communication links between satellites and ground stations, the transmitted signal is exposed to disturbances such as noise of different types that hinder reception or retrieval of information. For that reason, different ... -
Apparent impedance analysis: A new method for power system stability analysis
Rygg, Atle; Amin, Mohammad; Molinas Cabrera, Maria Marta; Gustavsen, Bjørn Alfred (Conference object; Peer reviewed, 2016)In this paper a new method for power system stability analysis is introduced. The method is based on injection of a small voltage or current in an arbitrary point of the system. The apparent impedance is defined as the ... -
Apparent impedance analysis: A small-signal method for stability analysis of power electronic based systems
Rygg, Atle; Molinas Cabrera, Maria Marta (Journal article, 2017)In this paper a new method for power system stability analysis is introduced. The method is based on injection of a small voltage or current in an arbitrary point of a power system. The apparent impedance is then defined ... -
Approaches to Economic Energy Management in Diesel-Electric Marine Vessels
Skjong, Espen; Johansen, Tor Arne; Molinas Cabrera, Maria Marta; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2017)Recently, the efficiency of diesel-electric marine vessels has been subject for discussion with focus on improving fuel efficiency, reducing the environmental footprint from emissions, as well as reducing running hours and ... -
Assessing High-Order Harmonic Resonance in Locomotive-Network Based on the Impedance Method
Li, Jing; Wu, Mingli; Molinas Cabrera, Maria Marta; Song, Kejian; Liu, Qiujiang (Journal article; Peer reviewed, 2019)Many new types of locomotives are put to use in electric railway systems, resulting in instability problems such as high-order harmonic resonance occurring as a consequence of the interaction between the electrical locomotive ... -
Assessing the impact of idle state type on the identification of RGB color exposure for BCI
Torres-Garcia, Alejandro Antonio; Moctezuma, Luis Alfredo; Molinas Cabrera, Maria Marta (Chapter, 2020) -
Automatic Selection of Frequency Bands for Electroencephalographic Source Localization
Munoz, Pablo; Giraldo, Eduardo; Lopez, Maximiliano Bueno; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2019)This paper shows a method to locate actives sources from pre-processed electroencephalographic signals. These signals are processed using multivariate empirical mode decomposition (MEMD). The intrinsic mode functions are ... -
Comparative Eigenvalue Analysis of Synchronous Machine Emulations and Synchronous Machines
Unamuno, Eneko; Suul, Jon Are Wold; Molinas Cabrera, Maria Marta; Barrena, Jon Andoni (Chapter, 2019)This paper presents a comparative eigenvalue analysis of the stability characteristics and small signal dynamics of four different control strategies for Synchronous Machine Emulation (SME) by power electronic converters, ... -
Control of a Type-IV Wind Turbine with the Capability of Robust Grid-Synchronization and Inertial Response for Weak Grid Stable Operation
Sang, Shun; Zhang, Chen; Cai, Xu; Molinas Cabrera, Maria Marta; Zhang, Jianwen; Rao, Fangquan (Journal article; Peer reviewed, 2019)With the increasing penetration of wind power, the effective inertia of the power system reduces. Besides, a series of interactive instability issues including sub-synchronous oscillations and harmonic oscillations were ... -
Damping region extension for digitally controlled LCL-type grid-connected inverter with capacitor-current feedback
Liu, Jinhong; Zhou, Lin; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2018)This study investigates the extent to which the damping region of a digitally controlled LCL-type grid connected inverter is influenced by the ratio between sampling and switching frequencies, the grid impedance variation ...