Fernando Jimenez

Los Andes University (Colombia) | UNIANDES · Department of Electric and Electronic Engeneering

This paper presents the building process of an interactive instrument called the Colombian Solar Atlas able to easily visualize meteorological data but also assess the current and future potentials of solar photovoltaic generation throughout the whole territory of Colombia, South America. This new tool is based on two different meteorological datab...

A lack of data collection on conscious mobility behaviors has been identified in current sustainable and smart mobility planning, development and implementation strategies. This leads to technocentric solutions that do not place people and their behavior at the center of new mobility solutions in urban centers around the globe. This paper introduce...

The purpose of this article is to demonstrate land-use changes from forest to agriculture in Ejido Salamanca in the southern state of Quintana Roo in Mexico. This transformation from forest to agriculture was caused by Mennonites-an ethnic group originally from Chortitza today southern Ukraine-, that arrived in Mexico in 1922 from Canada. This land...

A substantial reform of undergraduate engineering education is necessary due to the increasingly complex and technologically driven workplace, political, and social arenas of the 21st century. Apart from technical skills, engineering students should acquire a broader set of essential skills through different student-centred learning approaches wher...

IoT environments are continuously changing. Changes may come from the service, connectivity, or physical layers of the IoT architecture. Therefore, to function appropriately, the system needs to dynamically adapt to its environment. In previous work, we posited eight challenges to foster adaptation through all architecture layers of IoT systems. In...

Without a clear view about how long the Cov2 will continue affecting the humankind, governments are facing a multi striking menace with no precedents. The first big challenge was to define whether trying to block contamination or curing the sick. The question seemed to have two answers depending on the established medical capacity of each country....

In this paper is the development of a high granularity photovoltaic model that considers complex nonuniform shadow conditions and different cell temperatures. The model integrates the nonuniform shading characteristics such as different areas for each cell, different direct and indirect solar irradiations for each cell, and different temperatures....

This paper presents the modeling of a photovoltaic system under complex shading conditions. The approach integrates a complete PV array with each cell modeled separately including shadow coefficients depending on a percentage of the area impacted and the level of irradiance (named shaded opacity). A dedicated global maximum power point tracking alg...

A boost inverter is a versatile architecture able to supply DC or AC outputs from diverse alternative energy sources. The most relevant advantage of this multipurpose converter is to provide boosting and inversion in a single stage. The boost inverter has been studied from design and control perspectives with renewable energy sources. However, the...

This paper presents the study of a simplified approach to model and analyze the performance of partially shaded photovoltaic modules using the shading ratio. This approach integrates the characteristics of shaded area and shadow opacity into the photovoltaic cell model. The studied methodology is intended to improve the description of shaded photov...

Due to the increasing use of renewables into the grid connected through power converters, the rotational inertia in power systems has been reducing. Consequently the frequency response requires the activation of the so-called synthetic inertia control. The synthetic inertia control aims to inject an extra power component when the system experiences...

Due to the increasing use of renewables into the grid connected through power converters, the rotational inertia in power systems has been reducing. Consequently the frequency response requires the activation of the so-called synthetic inertia control. The synthetic inertia control aims to inject an extra power component when the system experiences...

Industrial plant safety involves integrated management of all the factors that may cause accidents. Process alarm management can be formulated as a pattern recognition problem in which temporal patterns are used to characterize different typical situations, particularly at startup and shutdown stages. In this paper we propose a new approach of alar...

Process alarm management can be approached as a pattern recognition problem in which temporal patterns are used to characterize different typical situations, particularly at startup and shutdown stages. This paper focuses on learning the temporal patterns, in the form of chronicles, by extending the previously proposed Heuristic Chronicle Discovery...

In this paper an Integrated Development Environment (IDE) is proposed for the FPGA Controller design for quadcopters (including specifications, design and implementation). This IDE was developed using the High Level Specification of Embedded Systems Rich Client Platform (HiLeS-RCP). The HiLeS-RCP is a framework for specialized “per product line” ID...

The transitions between operational modes (start up/shut down) in chemical processes generate alarm floods and cause critical alarm saturation. We propose in this paper an approach of alarm management based on a diagnosis process. This diagnosis step relies on situation recognition to provide to the operators relevant information on the failures in...

Embedded systems (ES) based on field programmable gate arrays (FPGAs) enhance the overall computational capability and relieve computational load. The lack on design and implementation methods for specific control functions in hardware limits the application of complex control techniques. Therefore, a design methodology approach is showed in the cu...

This paper outlines a methodology for modeling photovoltaic systems in embedded hardware. This methodology uses the HiLeS platform to transform SysML models in Petri nets and generate VHDL code. The proposed methodology is intended for Hardware-in-the-Loop simulations of power converters and PV panels in microgrids. In addition, this methodology al...

Nowadays, power electronics applications in microgrids have increased their complexity. This rising of complexity implies new strategies for real time simulation and control systems design. Therefore, high performance devices are required to implement Hardware-in-the-Loop models of microgrids for real time simulations. Furthermore, control system a...

This paper presents the application of HiLeS (High Level Specification of Embedded Systems) formalism to design a supervisory controller based on FPGA for interleaved boost converters. This controller is intended to increase the versatility and efficiency of interleaved boost converters. Furthermore, the proposed supervisory controller uses Petri n...

This paper outlines the application of the HiLeS-RCP (High Level Specification of Embedded Systems - Rich Client Platform) to model and design controllers of interleaved boost converters using the Systems Modelling Language (SysML). HiLeS-RCP allows the transformation from SysML models to Petri nets for implementation in embedded hardware. As a res...

Current applications of Hardware-in-the-Loop to model physical systems implementing differential equations in FPGA have shown an important increase due to their versatility and real-time response. However, code generation to implement differential equations into embedded hardware requires of designers high level of knowledge and time. This paper pr...

This paper presents Tucan, an approach to automatically create a virtual prototype (VP) and to support the analysis of VP testing results to validate time constraint requirements in real-time embedded systems. Virtual prototyping is a fast and reliable solution to facilitate system testing and time constraint validation. However, analyzing simulati...

The use of reconfigurable platforms for embedded system design leverages product line engineering (PLE), in which the development of products starts from a set of core assets (the platform) rather than the development of individual products from zero. Two major activities of PLE are domain engineering (i.e., platform development) and product engine...

Verification of functional and non-functional requirements throughout the design process is a cost-effective solution when compared to a build-test validation process. By using a model based design process and by describing system behavior with a formal model, model checking becomes a viable solution to perform requirement verification at early sta...

Hierarchical coordinated control architectures applied to Microgrids (MG) are a requirement in order to monitor and supervise the power stages involved and to provide some autonomous and smartness behaviour to the grid. In this document, a hierarchical controller based on a Petri Nets methodology to low voltage MG with wind energy is applied. The c...

Smart Microgrid (MG) systems require the development of new control strategies in order to provide of autonomous operability in their processes and self-diagnosis in case of different operation ranges. The integration and deep penetration of Distributed Generation (DG) and the suddenly changes in the load during the transition's system generates di...

The concept of system level, introduced in Electronic System Level(ESL), offers a system-model representation before thinking about the partition between software and hardware. One ESL initiative is model-based systems engineering (MBSE), whose objective is to reduce ambiguity of specification interpretation, to verify specification in early design...

Embedded system virtual prototyping allows exploration of solutions in system architecture and hardware specification, prior to real prototype construction, resulting in higher quality products, shorter time to market and cost reduction. Virtual prototypes allow simulation of the system so designers can analyze and evaluate their design decisions a...

Verification is one of the most important tasks into the process of systems design. This time-consuming task guarantees the correct functionality of the system. We propose to use HiLeS Designer tool to model and to verify heterogeneous systems in order to reduce functionality risks and time. This tool allows verifying in two ways: formal verificati...

System design methodology becomes a strategic activity in the industrial competition. Obtaining substantial reduction of time to market for complex and reliable products is one of the priorities for the manufacturers. Top down design, automated generation of architecture, co-design, virtual prototyping, etc. are already identified as research topic...

The improvement of micro-technologies in the microelectronics world has allowed the creation of ultra miniaturised devices, which are called MEMS-micro electro mechanical systems or microsystems. A major problem concerns the design of these heterogeneous circuits because it associates disciplines such as electronics, mechanics, chemistry, etc. This...