2022
Autores
Amoura, Y; Pereira, AI; Lima, J; Ferreira, Â; Boukli Hacene, F;
Publicação
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Abstract
The use of several distributed generators as well as the energy storage system in a local microgrid require an energy management system to maximize system efficiency, by managing generation and loads. The main purpose of this work is to find the optimal set-points of distributed generators and storage devices of a microgrid, minimizing simultaneously the energy costs and the greenhouse gas emissions. A multi-objective approach called Pareto-search Algorithm based on direct multi-search is proposed to ensure optimal management of the microgrid. According to the non-dominated resulting points, several scenarios are proposed and compared. The effectiveness of the algorithm is validated, giving a compromised choice between two criteria: energy cost and GHG emissions.
2022
Autores
Silva, Adriano S.; Brito, Thadeu; Díaz de Tuesta, Jose Luis; Lima, José; Pereira, Ana I.; Silva, Adrián; Gomes, Helder;
Publicação
2nd Symposium of Applied Science for Young Researchers
Abstract
2022
Autores
Silva, William; Brito, Thadeu; Gambôa, Luis; Lima, José;
Publicação
2nd Symposium of Applied Science for Young Researchers
Abstract
It is known that electrical energy consumption is higher during the day than at
night.This is a challenge to balance the consumption levels because when the consumption is
high at night, it does not have energy production to supply and the tariff usage is cheaper. Aspiring to avoid the users consuming too much electrical energy and work on this usage control
during the night, the present work aims to develop smart plug modules that could self-manage
power in residence utilizing the minimum of grid energy. In this sense, the modules may use the
overproduction of energy coming from generator systems (such as photovoltaic panels), eliminating the necessity of battery usage. Sometimes, the power supply could provide different values of
current, consequently, the use of this electric energy needs to adapt according to the production.
Therefore, the final objective is to build an intelligent electrical management system that works
on energy efficiency.
2022
Autores
Dias, Paloma; Brito, Thadeu; Lopes, Luís; Lima, José;
Publicação
CIEEMAT 2022 VII Ibero-American Congress on Entrepreneurship, Energy, Environment and Technology
Abstract
In the current energy context, alternatives are sought that provide a more conscious use of energy and the development of technology aimed at efficiently meeting the needs of energy consumers and the utility company. In this scenario, smart systems for monitoring and controlling the energy consumption of residential loads stand out. In [1], the authors worked on a system from which the user could monitor their energy consumption in real time. Through a website, the consumer accessed their information using visualizations in graphics, for example. Consumption data was obtained by a smart plug. Furthermore, the option to remotely turn devices on and off has been included in the system so that the user has the ease of controlling their devices.
2022
Autores
Martins, Danilo M.D.; Silva, Felipe G.; Sena, Inês; Lima, Laíres A.; Fernandes, Florbela P.; Pacheco, Maria F.; Vaz, Clara B.; Lima, José; Pereira, Ana I.;
Publicação
2nd Symposium of Applied Science for Young Researchers
Abstract
Workplace accidents are a concern for companies nowadays and can occur due to internal and external factors of the company. Thereby, several strategies are developed to predict and minimize the hazards in this environment. Companies resort to intelligent solutions, such as predictive analytics, aiming to increase productivity while ensuring safety in the work environment. In terms of accident prediction analysis, different input data are needed to ensure the accuracy of a predictive model. Therefore, this study aims to automatic collect and pre-process data from holidays for subsequent implementation in an accident-oriented predictive model to demonstrate its relevance in predicting accidents in the workplace.
2022
Autores
Santos, MF; Honorio, LM; Moreira, APGM; Garcia, PAN; Silva, MF; Vidal, VF;
Publicação
ISA TRANSACTIONS
Abstract
Autonomous Robots with multiple directional thrusters are normally over-actuated systems that require nonlinear control allocation methods to map the forces that drive the robot's dynamics and act as virtual control variables to the actuators. This process demands computational efforts that, sometimes, are not available in small robotic platforms. The present paper introduces a new control allocation approach with fast convergence, high accuracy, and dealing with complex nonlinear problems, especially in embedded systems. The adopted approach divides the desired nonlinear system into coupled linear problems. For that purpose, the Real Actions (RAs) and Virtual Control Variables (VCVs) are broke in two or more sets each. While the RA subsets are designed to linearize the system according to different input subspaces, the VCV is designed to be partially coupled to overlap the output subspaces. This approach generates smaller linear systems with fast and robust convergence used sequentially to solve nonlinear allocation problems. This methodology is assessed in mathematical tutorial cases and over-actuated UAV simulations.
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