Characterization and Modeling of the Viscoelastic Behavior of Hydrocolloid-Based Films Using Classical and Fractional Rheological Models by David Ramirez-Brewer, Oscar Danilo Montoya, Jairo Useche Vivero, Luis García-Zapateiro

“…In this work, films based on hydrocolloids (gellan gum, carrageenan, and guar gum) were formulated, evaluating their dynamic rheological behavior and creep and recovery. Maxwell’s classical and fractional rheological models were implemented to describe its viscoelastic behavior, using the Vortex Search Algorithm for the estimation of the parameters. …”
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Sensorless Adaptive Voltage Control for Classical DC-DC Converters Feeding Unknown Loads: A Generalized PI Passivity-Based Approach by Walter Gil-González, Oscar Danilo Montoya, Carlos Restrepo, Jesus C. Hernández

“…Numerical simulations and experimental validations show that the PI passivity-based control allows voltage regulation with first-order behavior, while the classical PI controller produces oscillations in the controlled variable, significantly when the load varies.…”
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An IDA-PBC Design with Integral Action for Output Voltage Regulation in an Interleaved Boost Converter for DC Microgrid Applications by Oscar Danilo Montoya, Federico Martin Serra, Walter Gil-González, Eduardo Maximiliano Asensio, Jonathan Emmanuel Bosso

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On the Matricial Formulation of Iterative Sweep Power Flow for Radial and Meshed Distribution Networks with Guarantee of Convergence by Oscar Danilo Montoya, Walter Gil-González, Diego Armando Giral

“…This paper presents a general formulation of the classical iterative-sweep power flow, which is widely known as the backward–forward method. …”
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Optimal Placement and Sizing of D-STATCOM in Radial and Meshed Distribution Networks Using a Discrete-Continuous Version of the Genetic Algorithm by Cristian Mateo Castiblanco-Pérez, David Esteban Toro-Rodríguez, Oscar Danilo Montoya, Diego Armando Giral-Ramírez

“…This objective function is subject to the classical power balance constraints and devices’ capabilities. …”
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Genetic-Convex Model for Dynamic Reactive Power Compensation in Distribution Networks Using D-STATCOMs by Oscar Danilo Montoya, Harold R. Chamorro, Lazaro Alvarado-Barrios, Walter Gil-González, César Orozco-Henao

“…The optimal location of the D-STATCOMs is identified by implementing the classical and well-known Chu and Beasley genetic algorithm, which employs an integer codification to select the nodes where these will be installed. …”
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Relation between the Branch-to-Node Incidence and Triangular Matrices in Radial Distribution Networks by Oscar Danilo Montoya, Walter Gil-González, Alexander Molina-Cabrera

“…The power flow solution is a classical problem in electrical engineering that has been studied for more than 60 years [1]. …”
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Hybrid GA-SOCP Approach for Placement and Sizing of Distributed Generators in DC Networks by Oscar Danilo Montoya, Walter Gil-González, Luis Fernando Grisales-Noreña

“…The master stage applies to the classical Chu & Beasley genetic algorithm (GA), while the slave stage resolves a second-order cone programming reformulation of the optimal power flow problem for DC grids. …”
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An MI-SDP Model for Optimal Location and Sizing of Distributed Generators in DC Grids That Guarantees the Global Optimum by Walter Gil-González, Alexander Molina-Cabrera, Oscar Danilo Montoya, Luis Fernando Grisales-Noreña

“…This paper deals with a classical problem in power system analysis regarding the optimal location and sizing of distributed generators (DGs) in direct current (DC) distribution networks using the mathematical optimization. …”
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A Comparative Study on Power Flow Methods for Direct-Current Networks Considering Processing Time and Numerical Convergence Errors by Luis Fernando Grisales-Noreña, Oscar Danilo Montoya, Walter Julian Gil-González, Alberto-Jesus Perea-Moreno, Miguel-Angel Perea-Moreno

“…Three classical numerical methods were studied: Gauss–Jacobi, Gauss–Seidel, and Newton–Raphson. …”
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Optimal Selection of Conductors in Three-Phase Distribution Networks Using a Discrete Version of the Vortex Search Algorithm by John Fernando Martínez-Gil, Nicolas Alejandro Moyano-García, Oscar Danilo Montoya, Jorge Alexander Alarcon-Villamil

“…To evaluate the costs of the energy losses, a classical backward/forward three-phase power-flow method is implemented. …”
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Power flow methods used in AC distribution networks: An analysis of convergence and processing times in radial and meshed grid configurations by L.F. Grisales-Noreña, J.C. Morales-Duran, S. Velez-Garcia, Oscar Danilo Montoya, Walter Gil-González

“…In the specialized literature, multiple classical and modern methods seek to improve the solutions achieved in terms of convergence and processing times. …”
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Application of the Vortex Search Algorithm to the Phase-Balancing Problem in Distribution Systems by Brandon Cortés-Caicedo, Laura Sofía Avellaneda-Gómez, Oscar Danilo Montoya, Lazaro Alvarado-Barrios, Harold R. Chamorro

“…The numerical results of simulations performed in IEEE 8-, 25-, and 37-node test systems demonstrate the applicability of the proposed methodology when compared with the classical Cuh & Beasley genetic algorithm. In addition, the computation times required by the algorithm to find the optimal solution are in the order of seconds, which makes the proposed DVSA a robust, reliable, and efficient tool. …”
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Reduction of Losses and Operating Costs in Distribution Networks Using a Genetic Algorithm and Mathematical Optimization by Fabio Edison Riaño, Jonathan Felipe Cruz, Oscar Danilo Montoya, Harold R. Chamorro, Lazaro Alvarado-Barrios

“…While this algorithm is a classical method for resolving this type of optimization problem, the solutions found using this approach are better than those reported in the literature using metaheuristic techniques and the General Algebraic Modeling System (GAMS). …”
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A Mixed-Integer Quadratic Formulation of the Phase-Balancing Problem in Residential Microgrids by Alejandro Garces, Walter Gil-González, Oscar Danilo Montoya, Harold R. Chamorro, Lazaro Alvarado-Barrios

“…Phase balancing is a classical optimization problem in power distribution grids that involve phase swapping of the loads and generators to reduce power loss. …”
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The Equivalence between Successive Approximations and Matricial Load Flow Formulations by María Camila Herrera-Briñez, Oscar Danilo Montoya, Lazaro Alvarado-Barrios, Harold R. Chamorro

“…This paper shows the equivalence of the matricial form of the classical backward/forward load flow formulation for distribution networks with the recently developed successive approximations (SA) load flow approach. …”
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Optimal Location-Reallocation of Battery Energy Storage Systems in DC Microgrids by Oscar Danilo Montoya, Walter Gil-González, Edwin Rivas-Trujillo

“…Both the models are constrained by classical nonlinear power flow equations, distributed generation capabilities, and voltage regulation, among others. …”
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A Comparative Study on Power Flow Methods Applied to AC Distribution Networks with Single-Phase Representation by Oscar Danilo Montoya, Alexander Molina-Cabrera, Jesus C. Hernández

“…The numerical comparison involves three main aspects: the convergence rate, processing time, and the number of iterations calculated using the classical Newton–Raphson method as the reference case. …”
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An Improved Crow Search Algorithm Applied to the Phase Swapping Problem in Asymmetric Distribution Systems by Brandon Cortés-Caicedo, Laura Sofía Avellaneda-Gómez, Oscar Danilo Montoya, Lázaro Alvarado-Barrios, César Álvarez-Arroyo

“…Numerical results on the 8-, 25-, and 37-node test systems show the efficiency of the proposed approach when compared to the classical version of the crow search algorithm, the Chu and Beasley genetic algorithm, and the vortex search algorithm. …”
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Optimal Selection and Location of Fixed-Step Capacitor Banks in Distribution Networks Using a Discrete Version of the Vortex Search Algorithm by Walter Gil-González, Oscar Danilo Montoya, Arul Rajagopalan, Luis Fernando Grisales-Noreña, Jesus C. Hernández

“…The main advantage of combining the exponential function with the Gaussian distribution is the correct balance between the exploration and exploitation of the solution space, which allows reaching the global optimal solution of the optimization problem with a low standard deviation, i.e., guaranteeing repeatability at each simulation. Two classical distribution networks composed of 33 and 69 nodes were used to validate the proposed DVSA algorithm. …”
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