Email: catalina.gonzalez@sdas-group.com | website: https://sites.google.com/site/catalinagonzalezcastano/home

She was born in Dosquebradas - Colombia in 1985. She received the electronic engineering degree from Universidad Nacional de Colombia, Manizales, and the Master Engineering degree in Electrical Engineering from Universidad Tecnológica de Pereira in 2008 and 2013, respectively. She worked as an assistant professor at Universidad Surcolombiana in Neiva in 2014-2015. She is currently working towards the Ph.D. degree in the field of power electronics for electric vehicles.

Research Interests

Powe quality, power electronics, vehicular power systems, digilat control, static var compensator, image processing.

Publications

1. Advances in Homotopy Applied to Object Deformation
   International Conference on Bioinformatics and Biomedical Engineering
   Jose Alejandro Salazar-Castro, Ana Cristina Umaquinga-Criollo, Lilian Dayana Cruz-Cruz, Luis Omar Alpala-Alpala, Catalina González-Castaño, Miguel A Becerra-Botero, Diego Hernán Peluffo-Ordóñez, Cesar Germán Castellanos-Domínguez
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   Abstract

   This work explores novel alternatives to conventional linear homotopy to enhance the quality of resulting transitions from object deformation applications. Studied/introduced approaches extend the linear mapping to other representations that provides smooth transitions when deforming objects while homotopy conditions are fulfilled. Such homotopy approaches are based on transcendental functions (TFH) in both simple and parametric versions. As well, we propose a variant of an existing quality indicator based on the ratio between the coefficients curve of resultant homotopy and that of a less-realistic, reference homotopy. Experimental results depict the effect of proposed TFH approaches regarding its usability and benefit for interpolating images formed by homotopic objects with smooth changes.

2. Design of a bidirectional DC/DC converter with coupled inductor for an electric vehicle application
   Industrial Electronics (ISIE), 2017 IEEE 26th International Symposium
   Catalina González-Castaño, Enric Vidal-Idiarte, Javier Calvente
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   Abstract

   The aim of this work is to design and implement a bidirectional buck-boost converter prototype to regulate DC voltage in a powertrain of an electric vehicle. To validate the design of the proposed converter start-up transient experiments are realized in open loop for the buck and boost mode. The activation signals of MOSFETS switch are generated using a transition method by hysteresis and are implemented in micro-controller. Experimental results show its works properly in both modes, keeping the criteria design parameters.

3. Modelos de horno de arco eléctrico para estudios del efecto flicker
   Tecnura
   Catalina González Castaño, Alfonso Alzate Gómez, Jesser James Marulanda Durango
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   Abstract

   Objetivo: El objetivo de este artículo es evaluar las fluctuaciones de voltaje o flicker de dos modelos de un horno de arco eléctrico a través de la comparación con datos reales. Método: El primer modelo se fundamenta a partir del principio de conservación de la energía, de la cual se obtiene una ecuación diferencial no lineal que captura la característica voltaje–corriente del arco eléctrico. Las fluctuaciones de voltaje se generan con un circuito de caos que modula la amplitud del voltaje del arco eléctrico. El segundo modelo está basado en las relaciones empíricas entre la longitud de arco, la tensión y la corriente a través del arco. Las fluctuaciones de voltaje se obtienen agregando una señal aleatoria a la longitud del arco eléctrico. Ambos modelos son implementados en PSCAD TM. Resultados: Los resultados de ambos modelos son comparados con mediciones reales tomadas en la etapa más crítica de la operación del horno, y muestran que el modelo basado en la conservación de la potencia presenta un menor error medio cuadrático promedio en los voltajes y corrientes de 5, 6 V y 1.7 kA frente a 27, 2 V y 3.38 kA obtenidos con el segundo modelo. Conclusiones: Ambos modelos consideran la no linealidad y comportamiento aleatorio que exhibe este tipo de carga, validando su inclusión en modelos computacionales de sistemas eléctricos de potencia.

4. Deforming objects via exponential homotopy: A first approach
   Signal Processing, Images and Computer Vision (STSIVA), 2015 20th Symposium
   Luis O Alpala, Diego H Peluffo-Ordóñez, Catalina González-Castaño, Fredy A Guasmayan
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   Abstract

   This work presents a novel alternative to conventional linear homotopy with suboptimal settings for applications on object deformation. Proposed approach extends the linear mapping to exponential representations that provides smooth transitions when deforming objects while homotopy conditions are fulfilled. As well, we introduce a quality indicator based on the ratio between the coefficients curve of resultant homotopy and those of a non-realistic, reference homotopy. Experimental results are promising and show the applicability of exponential homotopy to interpolating images with soft changes and homotopic geometric objects.

5. Modelo de horno de arco eléctrico para estudios del efecto flicker y su solución con métodos de compensación
   International Conference on Bioinformatics and Biomedical Engineering
   Catalina Gonzalez Castaño
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   Abstract

   Objective: The aim of this paper is to evaluate voltage fluctuations or flicker of two electric arc furnace models through comparison with real data. Method: The first proposed model is founded on the energy conservation principle, which generates a non-linear differential equation modelling the electric arc voltage - current characteristics. Voltage fluctuations are generated using a chaotic circuit that modulates the amplitude of arc voltage. The second model is based on the empirical relationship between the arc diameter or length as well as voltage and electrical current on the arc. Voltage fluctuations are considered adding a random signal in the arc length. Both models are implemented in PSCADTM. Results: The results of both models are compared with real data taken at the most critical stage of the operation of the furnace, and they show that the model based on energy conservation has a lower average mean square error in the voltages and currents 5.6 V and 1.7 kA against 27,2 V y 3.38 kA obtained with the second model. Conclusions: Both models consider the nonlinearity and random behavior present in this type of load, validating their inclusion in computer models of electric power systems.