scholarly journals Partial Discharge and Internet of Things: A Switchgear Cell Maintenance Application Using Microclimate Sensors

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8372
Author(s):  
Radu Fechet ◽  
Adrian I. Petrariu ◽  
Adrian Graur
Keyword(s):  
Internet Of Things ◽  
Low Voltage ◽  
Low Cost ◽  
Time Interval ◽  
Efficient System ◽  
Climate Conditions ◽  
Medium Voltage ◽  
Iot Platform ◽  
Significant Damage ◽  
Microclimate Monitoring

This paper proposes a solution for the development of microclimate monitoring for Low Voltage/High Voltage switchgear using the PRTG Internet of Things (IoT) platform. This IoT-based real time monitoring system can enable predictive maintenance to reduce the risk of electrical station malfunctions due to unfavorable environmental conditions. The combination of humidity and dust can lead to unplanned electrical discharges along the isolators inside a low or medium voltage electric table. If no predictive measures are taken, the situation may deteriorate and lead to significant damage inside and outside the switchgear cell. Thus, the mentioned situation can lead to unprogrammed maintenance interventions that can conduct to the change of the entire affected switchgear cell. Using a low-cost and efficient system, the climate conditions inside and outside the switchgear are monitored and transmitted remotely to a monitoring center. From the results obtained using a 365-day time interval, we can conclude that the proposed system is integrated successfully in the switchgear maintaining process, having as result the reduction of maintenance costs.

scholarly journals Partial Discharge and Internet of Things: A Switchgear Cell Maintenance Application using Microclimate Sensors

2021 ◽  
Author(s):  
Radu Fechet ◽  
Adrian Ioan Petrariu ◽  
Adrian Graur
Keyword(s):  
Internet Of Things ◽  
Low Voltage ◽  
Low Cost ◽  
Time Interval ◽  
Efficient System ◽  
Climate Conditions ◽  
Medium Voltage ◽  
Iot Platform ◽  
Significant Damage ◽  
Microclimate Monitoring

This paper proposes a solution for the development of microclimate monitoring for Low Voltage / High Voltage switchgear using the PRTG Internet of Things (IoT) platform. This IoT-based real time monitoring system can enable predictive maintenance to reduce the risk of electrical station malfunctions due to unfavorable environmental conditions. The combination of humidity and dust can lead to unplanned electrical discharges along the isolators inside a low or medium voltage electric table. If no predictive measures are taken, the situation may deteriorate and lead to significant damage inside and outside the switchgear cell. Thus, the mentioned situation can lead to unprogrammed maintenance interventions that can conduct to the change of the entire affected switchgear cell. Using a low-cost and efficient system, the climate conditions inside and outside the switchgear is monitored and transmitted remotely to a monitoring center. From the results obtained using a 365-day time interval, we can conclude that the proposed system is integrated successfully in the switchgear maintaining process, having as result the reducing of maintenance costs.

scholarly journals IOTFlood: hardware and software platform using internet of things to monitor floods in real time

2021 ◽  
Vol 16 (4) ◽  
pp. 1
Author(s):  
Francisco Vital Da Silva Júnior ◽  
Mônica Ximenes Carneiro Da Cunha ◽  
Marcílio Ferreira De Souza Júnior
Keyword(s):  
Internet Of Things ◽  
Real Time ◽  
Monitoring System ◽  
Research Design ◽  
Open Source Software ◽  
Low Cost ◽  
Sensor Data ◽  
Software Platform ◽  
Web Interface ◽  
Iot Platform

Floods are responsible for a high number of human and material losses every year. Monitoring of river levels is usually performed with radar and pre-configured sensors. However, a major flood can occur quickly. This justifies the implementation of a real-time monitoring system. This work presents a hardware and software platform that uses Internet of Things (IoTFlood) to generate flood alerts to agencies responsible for monitoring by sending automatic messages about the situation of rivers. Research design involved laboratory and field scenarios, simulating floods using mockups, and later tested on the Mundaú River, state of Alagoas, Brazil, where flooding episodes have already occurred. As a result, a low-cost, modular and scalable IoT platform was achieved, where sensor data can be accessed through a web interface or smartphone, without the need for existing infrastructure at the site where the IOTFlood solution was installed using affordable hardware, open source software and free online services for the viewing of collected data.

scholarly journals Integrated Solution for Driving Series-Connected IGBTs and Its Natural Intrinsic Balancing

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2406
Author(s):  
Gustavo O. Fortes ◽  
Marcos A. S. Mendes ◽  
Porfírio C. Cortizo
Keyword(s):  
Low Voltage ◽  
Low Cost ◽  
Operating Conditions ◽  
Experimental Results ◽  
Commercial Products ◽  
Lower Power ◽  
Medium Voltage ◽  
A Current

The use of series connected IGBTs is still a current subject in literature, despite such a discussion having started in the 1990s. Though countless academic studies, there are currently no available commercial products on the market for medium voltage inverters (up to 4.16 kV) and lower power (up to 1 MW) using this technology. This is related to the difficulty of ensuring the dynamic and static voltage sharing between IGBTs, giving rise to relatively expensive and complex firing circuits, when compared to the components they intend to control. Therefore, this article aims to present a simple and low-cost alternative, still effective for driving low voltage series-connected IGBTs, specifically for the encapsulation TO-247 type. Experimental results are presented showing the behavior of the solution under several operating conditions.

scholarly journals Low-Cost, Open Source IoT-Based SCADA System Design Using Thinger.IO and ESP32 Thing

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 822 ◽  
Author(s):  
Lawrence Oriaghe Aghenta ◽  
Mohammad Tariq Iqbal
Keyword(s):  
Internet Of Things ◽  
Open Source ◽  
Supervisory Control ◽  
Low Cost ◽  
Raspberry Pi ◽  
Voltage Sensors ◽  
Scada System ◽  
Iot Platform ◽  
Field Instrumentation ◽  
Distributed Processes

Supervisory Control and Data Acquisition (SCADA) is a technology for monitoring and controlling distributed processes. SCADA provides real-time data exchange between a control/monitoring centre and field devices connected to the distributed processes. A SCADA system performs these functions using its four basic elements: Field Instrumentation Devices (FIDs) such as sensors and actuators which are connected to the distributed process plants being managed, Remote Terminal Units (RTUs) such as single board computers for receiving, processing and sending the remote data from the field instrumentation devices, Master Terminal Units (MTUs) for handling data processing and human machine interactions, and lastly SCADA Communication Channels for connecting the RTUs to the MTUs, and for parsing the acquired data. Generally, there are two classes of SCADA hardware and software; Proprietary (Commercial) and Open Source. In this paper, we present the design and implementation of a low-cost, Open Source SCADA system by using Thinger.IO local server IoT platform as the MTU and ESP32 Thing micro-controller as the RTU. SCADA architectures have evolved over the years from monolithic (stand-alone) through distributed and networked architectures to the latest Internet of Things (IoT) architecture. The SCADA system proposed in this work is based on the Internet of Things SCADA architecture which incorporates web services with the conventional (traditional) SCADA for a more robust supervisory control and monitoring. It comprises of analog Current and Voltage Sensors, the low-power ESP32 Thing micro-controller, a Raspberry Pi micro-controller, and a local Wi-Fi Router. In its implementation, the current and voltage sensors acquire the desired data from the process plant, the ESP32 micro-controller receives, processes and sends the acquired sensor data via a Wi-Fi network to the Thinger.IO local server IoT platform for data storage, real-time monitoring and remote control. The Thinger.IO server is locally hosted by the Raspberry Pi micro-controller, while the Wi-Fi network which forms the SCADA communication channel is created using the Wi-Fi Router. In order to test the proposed SCADA system solution, the designed hardware was set up to remotely monitor the Photovoltaic (PV) voltage, current, and power, as well as the storage battery voltage of a 260 W, 12 V Solar PV System. Some of the created Human Machine Interfaces (HMIs) on Thinger.IO Server where an operator can remotely monitor the data in the cloud, as well as initiate supervisory control activities if the acquired data are not in the expected range, using both a computer connected to the network, and Thinger.IO Mobile Apps are presented in the paper.

scholarly journals A compact, modular and low-cost Internet of Things (IoT) platform for air quality monitoring in urban areas

2020 ◽  
Vol 1710 ◽  
pp. 012004
Author(s):  
Christos Spandonidis ◽  
Stefanos Tsantilas ◽  
Elias Sedikos ◽  
Nektarios Galiatsatos ◽  
Fotios Giannopoulos ◽  
...  
Keyword(s):  
Air Quality ◽  
Internet Of Things ◽  
Urban Areas ◽  
Low Cost ◽  
Quality Monitoring ◽  
Air Quality Monitoring ◽  
Iot Platform

scholarly journals Large-Scale Internet of Things Multi-Sensor Measurement Node for Smart Grid Enhancement

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8093
Author(s):  
Adrian I. Petrariu ◽  
Eugen Coca ◽  
Alexandru Lavric
Keyword(s):  
Internet Of Things ◽  
Smart Grid ◽  
Energy Demand ◽  
Large Scale ◽  
Low Voltage ◽  
Wireless Sensor Node ◽  
Medium Voltage ◽  
New Directions ◽  
Sensor Measurement ◽  
The Internet Of Things

Electric power infrastructure has revolutionized our world and our way of living has completely changed. The necessary amount of energy is increasing faster than we realize. In these conditions, the grid is forced to run against its limitations, resulting in more frequent blackouts. Thus, urgent solutions need to be found to meet this greater and greater energy demand. By using the internet of things infrastructure, we can remotely manage distribution points, receiving data that can predict any future failure points on the grid. In this work, we present the design of a fully reconfigurable wireless sensor node that can sense the smart grid environment. The proposed prototype uses a modular developed hardware platform that can be easily integrated into the smart grid concept in a scalable manner and collects data using the LoRaWAN communication protocol. The designed architecture was tested for a period of 6 months, revealing the feasibility and scalability of the system, and opening new directions in the remote failure prediction of low voltage/medium voltage switchgears on the electric grid.

scholarly journals Adapting Internet of Things to Arduino-based Devices for Low-Cost Remote Sensing in School Science Learning Environments

2021 ◽  
Vol 17 (02) ◽  
pp. 4
Author(s):  
Seok Hyun Ga ◽  
Hyun-Jung Cha ◽  
Chan-Jong Kim
Keyword(s):  
Internet Of Things ◽  
Low Cost ◽  
School Science ◽  
Raspberry Pi ◽  
Physical Computing ◽  
Technical Problems ◽  
Measuring Devices ◽  
Iot Platform ◽  
Internet Of Things Technology ◽  
The Internet Of Things

<p class="0abstract"><span lang="EN-US">We examine the major technical problems that students experience in authentic scientific inquiry and propose an Arduino-based device, adapting the Internet of Things technology, which is designed for the school science in order to solve those technical problems. Three major technical problems as follows: First, it is difficult to have a variety of measuring tools which may satisfy the needs of students. Second, it is hard to equip students with tools befitting the complex inquiry procedures which students develop on their own. Lastly, there exists a problem in which a particular group(s) of students take advantage of their competence in technology and have a monopoly in the process of data analysis. Physical computing and the IoT technology can provide solutions to these problems. Development boards like Arduino and Raspberry Pi can be purchased at affordable prices, which allows for measuring devices to be made at low cost by connecting sensors to those boards. Utilizing these development boards may also lead to the possibility to optimize measuring methods or procedures for inquiries of each student. By transmitting the measured data to the IoT Platform, students can have an equal access to the data and analyze it easily. We also investigate technologies used in IoT-applied physical computing including development boards, IoT platforms, and telecommunications technologies. Lastly, as an example of inquiry that adapts physical computing and IoT, we introduce the case of transferring data, measured by a temperature/humidity sensor connected to a development board, to the IoT Platform and visualizing them.</span></p><div id="dicLayer" style="display: none;"> </div><div id="dicRawData" style="display: none;"> </div><div id="dicLayerLoader"> </div>

scholarly journals Compact Medium Voltage DC/DC Converter Using Series-Connected Power Devices

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1024
Author(s):  
Shaoduo Zheng ◽  
Feng Lyu
Keyword(s):  
Simple Structure ◽  
Low Voltage ◽  
High Reliability ◽  
Low Cost ◽  
Power Devices ◽  
Medium Voltage ◽  
Dc Power ◽  
Driver Circuit ◽  
Converter Design ◽  
Medium Voltage Dc

Medium voltage (MV) DC/DC converters are key equipment for interconnection between DC power lines with different voltage levels in MVDC grids. The Input-series-output-parallel (ISOP) modular MV DC/DC converter is feasible to realize MV to low voltage (LV) conversion. However, a large number of LV modules in the converter may reduce the reliability and increase the complexity. This letter proposes a phase-shifted full-bridge MV DC/DC converter using series-connected power devices as switching modules. The converter is of low cost, simple structure, compact volume, and high reliability because these switching modules require only one external isolated driver circuit and very few components to achieve voltage sharing among series-connected power devices. The operation principle of the switching modules is analyzed, and the simulation and experimental results validate the feasibility of the converter design.

scholarly journals A Development of Low Cost Wi-Fi Robot for Teaching Aid

2020 ◽  
Vol 12 (2) ◽  
pp. 60-66
Author(s):  
Nur Uddin
Keyword(s):  
Internet Of Things ◽  
Communication System ◽  
Low Cost ◽  
Type A ◽  
The Internet ◽  
Mechanical Structure ◽  
Iot Platform ◽  
Teaching Aid ◽  
Wheeled Robot ◽  
The Cost

A low-cost Wi-Fi robot as a teaching equipment is developed. The robot can be used to teach students in the subjects related to robotics system and internet of things (IoT). A Wi-Fi robot is a robot equipped with a Wi-Fi communication system for connecting to the internet. Integrating the robot with an IoT platform makes the robot able to communicate with other devices. The developed Wi-Fi robot in this study is a three-wheeled robot type. A NodeMCU ESP-12, which is a microcontroller equipped with Wi-Fi module, is applied in the robot. The robot is connected to the Blynk IoT platform and paired to a smartphone. It results in communication between the robot and the smartphone through the internet. The communication is demonstrated by remotely operating the robot using the smartphone. Mechanical structure and electronic wiring of the robot are simple such that the robot is easily built. Moreover, the cost of required components for building the robot is quite cheap as less than USD 20.

Bringing Security to The Smallest Embedded Systems

2017 ◽  
Author(s):  
JOSEPH YIU
Keyword(s):  
Internet Of Things ◽  
Embedded Systems ◽  
Low Cost ◽  
Security Requirements ◽  
The Internet ◽  
Security Measures ◽  
Significant Challenge ◽  
Iot Devices

The increasing need for security in microcontrollers Security has long been a significant challenge in microcontroller applications(MCUs). Traditionally, many microcontroller systems did not have strong security measures against remote attacks as most of them are not connected to the Internet, and many microcontrollers are deemed to be cheap and simple. With the growth of IoT (Internet of Things), security in low cost microcontrollers moved toward the spotlight and the security requirements of these IoT devices are now just as critical as high-end systems due to:

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