Hybrid Approach for Detection and Diagnosis of Short-Circuit Faults in Power Transmission Lines

Funding Information: The APC was funded by the H2020 BD4NRG European Project and by the UNINOVA research institute (https://www.uninova.pt(accessed on 28 March 2024)). This work has been supported by H2020 BD4NRG European Project—GA872613, https://www.bd4nrg.eu/ (accessed on 18 March 2024), by Department of Electrical and Computer Engineering of NOVA School of Science and Technology (FCT NOVA), by CTS-UNINOVA and LASI research units, and by national funds through FCT-Fundação para a Ciência e a Tecnologia within the Research unit CTS—Centro de Tecnologia e Sistemas. The authors would like to thank all the institutions, and also thank the REN company and the R&D Nester ID center, for the simulation data made available and for the exchange of knowledge. Colleagues Pedro Maló, Rui Azevedo Antunes and Paulo Gil deserve thanks for their support in some phases of the H2020 BD4NRG European Project. Publisher Copyright: © 2024 by the author.In this article, the main problem under investigation is the detection and diagnosis of short-circuit faults in power transmission lines. The proposed fault detection (FDD) approach is mainly based on principal component analysis (PCA). The proposed fault diagnosis/identification (FAI) approach is mainly based on sliding-window versions of the discrete Fourier transform (DFT) and discrete Hilbert transform (DHT). The main contributions of this article are (a) a fault detection approach based on principal component analysis in the two-dimensional scores space; and (b) a rule-based fault identification approach based on human expert knowledge, combined with a probabilistic decision system, which detects variations in the amplitudes and frequencies of current and voltage signals, using DFT and DHT, respectively. Simulation results of power transmission lines in Portugal are presented in order to show the robust and high performance of the proposed FDD approach for different signal-to-noise ratios. The proposed FDD approach, implemented in Python, that can be executed online or offline, can be used to evaluate the stress to which circuit breakers (CBs) are subjected, providing information to supervision- and condition-based monitoring systems in order to improve predictive and preventive maintenance strategies, and it can be applied to high-/medium-voltage power transmission lines as well as to low-voltage electronic transmission systems.publishersversionpublishe

An open-source UFBGA µ-board for wearable devices

This paper presents the development of an open-source, low-sized, BGA microcontroller breakout board, that can be used for the development of wearable and cyber-physical prototypes. The board is based on the low power, 8-bit, ATtiny20-CCU Microchip AVR microcontroller. The ATtiny20-CCU can be programmed without bootloader, using the Atmel Tiny Programming Interface (TPI), instead of In-System Programming (ISP). The C code used to program the microcontroller can be written and compiled using the Microchip Studio freeware platform. The ATtiny20-CCU Ultra Fine-pitch Ball Grid Array (UFBGA) packaging technology allows the shrinkage of the conceived Electroless Nickel-Immersion Gold (ENIG) Printed Circuit Board (PCB) to a size of only 15.5 × 13 mm. Its low cost also makes it a viable option for developing many educational electronic projects, especially for Instrumentation and Assistive Technology. The contribution of this paper is mainly the hardware prototype design, the PCB manufacturing, building and test of a very low-sized open source µ-breakout PCB board, for wearable Instrumentation applications, towards the emergent Society/Industry 5.0.publishersversionpublishe

Switched Unfalsified Multicontroller

In this paper, we present a controller design strategy for the implementation of a multicontroller structure for single-input single-output (SISO) plants. The overall control system can be viewed as a feedback interconnection of a SISO plant, a set of candidate controllers and a switched selection scheme that supervises the switching process among the candidate controllers. The switching scheme is designed without explicit assumptions on the plant model, based on the unfalsified control concept introduced by Safonov [1,2]. A switched multicontroller structure is implemented and experimental results are presented.publishersversionpublishe

A Multi-agent System for Outliers Accommodation in Wireless Sensor Networks

This work has been partially supported by the European Commission under the contract FP7-ICT-224282 (GINSENG) and Project CENTRO-07-ST24-FEDER-002003 (iCIS-Intelligent Computing in the Internet of Services).In monitoring applications the accuracy of data is paramount. When considering wireless sensor networks the quality of readings taken from the environment may be hampered by outliers in raw data collected from transmitters attached to nodes' analogue-to-digital converter ports. To improve the data quality sent to the base-station, a real-time data analysis should be implemented at nodes' level, while taking into account their computing power and storage limitations. This paper deals with the problem of outliers detection and accommodation in raw data. The proposed approach relies on univariate statistics within an hierarchical multi-agent framework. Results from experiments on a real monitoring scenario, at a major oil refinery plant, show the relevance of the proposed approach.publishersversionpublishe

Fitts’ Evaluation of a Developed Human-in-the-Loop Assistive Device

In this work, a new human-computer assistive technology gadget designed for people with impairments is evaluated. The developed human-in-the-loop interface device has an embedded assistance controller and can replace the traditional mouse, gamepad and keyboard, enabling humancomputer hands-free full access. This work is concerned with the assistive device performance characterization aspects. Based on the experiments carried out, the human-computer performance improvement with the embedded controller is analysed in detail. Results show that adding the human-in-the-loop assistance controller improves human-computer hands-free skills, which is an innovative contribution for the replacement of computer interfaces that depend on the human hands.info:eu-repo/semantics/publishedVersio

UFBGA u-breakout board

An open-source UFBGA u-breakout board with the ATtiny20-CCU microcontrolle

Quaternion-based AHRS with MEMS Motion Sensor for Biomedical Applications

Trabalho apresentado em IEEE IBITeC2021 (International Biomedical Instrumentation and Technology Conference), 20-21 outubro 2021, onlineThis work presents relevant theoretical and practical aspects towards the design of a quaternion-based real-time Attitude and Heading Reference System (AHRS). The motion sensor used in this work is the TDK InvenSense MPU-9250 9-degree (gyro + accelerometer + compass) Microelectromechan ical system. Results show that the AHRS developed device is “gimbal lock” immune, given that the 3D rotations are per formed in quaternions. The tiny electronic device allows real-time transmission of the 3D orientation and can be used as an AHRS solution for medical, sports science, rehabilitation and assistive technology. The contribution of this paper is a theoretical methodology and a practical implementation of an AHRS device for Biomedical applications.info:eu-repo/semantics/publishedVersio

Special Focus: The Use of Emerging Technologies on the Internet of Everything

The Internet of Everything is an interdisciplinary concept that involves technology, applications and people in a framework where emerging technologies can give a relevant contribute in education and in different application areas, namely in the scope of the interactive mobile technologies. This Special Issue collects a set of contributions to this topic resulting from the works presented in the Experiment@ International Workshop 2016 “The Emerging Technologies on the Internet of Everything” – ETIoE’16, held at University of the Azores (Ponta Delgada, Azores, Portugal). These articles comprise different perspectives in this field from research work and application development to case studies

Special Focus: The Use of Emerging Technologies on the Internet of Everything

The Internet of Everything is an interdisciplinary concept that involves technology, applications and people in a framework where emerging technologies can give a relevant contribute in education and in different application areas, namely in the scope of the interactive mobile technologies. This Special Issue collects a set of contributions to this topic resulting from the works presented in the Experiment@ International Workshop 2016 “The Emerging Technologies on the Internet of Everything” – ETIoE’16, held at University of the Azores (Ponta Delgada, Azores, Portugal). These articles comprise different perspectives in this field from research work and application development to case studies