An Alternative Internet-of-Things Solution Based on LoRa for PV Power Plants: Data Monitoring and Management

Paredes-Parra, José Miguel; García-Sánchez, Antonio-Javier; Mateo-Aroca, Antonio; Molina‐García, Ángel

doi:10.3390/en12050881

Cited by 54 publications

(36 citation statements)

References 88 publications

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“…Raspberry Pi was used as the onboard computer with the purpose of performing data logging and Internet communication. Because of its low power consumption and its potential to control and operate remotely, Arduino has been used for the Internet of Things (IoT) application in real-time data monitoring and management, e.g., the photovoltaic (PV) systems monitoring, as described in [20,21].…”

Section: Methodsmentioning

confidence: 99%

A Remotely Controlled Sea Level Compensation System for Wave Energy Converters

Ayob

Castellucci²,

Abrahamsson³

et al. 2019

Energies

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The working principle of the wave energy converter (WEC) developed at Uppsala University (UU) is based on a heaving point absorber with a linear generator. The generator is placed on the seafloor and is connected via a steel wire to a buoy floating on the surface of the sea. The generator produces optimal power when the translator's oscillations are centered with respect to the stator. However, due to the tides or other changes in sea level, the translator's oscillations may shift towards the upper or lower limit of the generator's stroke length, resulting in a limited stroke and a consequent reduction in power production. A compensator has been designed and developed in order to keep the generator's translator centered, thus compensating for sea level variations. This paper presents experimental tests of the compensator in a lab environment. The wire adjustments are based on online sea level data obtained from the Swedish Meteorological and Hydrological Institute (SMHI). The objective of the study was to evaluate and optimize the control and communication system of the device. As the device will be self-powered with solar and wave energy, the paper also includes estimations of the power consumption and a control strategy to minimize the energy requirements of the whole system. The application of the device in a location with high tides, such as Wave Hub, was analyzed based on offline tidal data. The results show that the compensator can minimize the negative effects of sea level variations on the power production at the WEC. Although the wave energy concept of UU is used in this study, the developed system is also applicable to other WECs for which the line length between seabed and surface needs to be adjusted.

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Section: Methodsmentioning

confidence: 99%

A Remotely Controlled Sea Level Compensation System for Wave Energy Converters

Ayob

Castellucci²,

Abrahamsson³

et al. 2019

Energies

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“…Other technologies have various limitations in terms of research. For example NB-IoT must be setup within a cellular network [18], Sigfox is a non-licensed technology that operates on the basis of subscription; therefore, to connect devices to the Sigfox network, the usage of application programming interfaces (APIs) of the Sigfox cloud platform is required. Other advantages of LoRa are that it is supported by many worldwide technology leaders, it has two model services, i.e., a provider network service and a private network, and the number of messages that can be sent in the LPWAN infrastructure is not limited (whereas Sigfox only allows 140 messages per day and per device) [19].…”

Section: Iot Technologies For Smart Citiesmentioning

confidence: 99%

“…Other important characteristics of LoRa are: (1) LoRa presents robustness against multi-path fading or Doppler effect; (2) LoRa also uses a proprietary chirp spread spectrum (CSS) modulation to archive distances greater than 700 km, and the CSS modulation provides robustness against interference and a very low signal-to-noise ratio (SNR) that allows the receiver to demodulate the signal; (3) LoRa is suitable for applications that require a very long battery lifetime and has a reduced installation cost; (4) LoRa allows tuning several physical transmission properties, such as bandwidth (BW), central frequency, coding rate (CR), spreading factor (SF), and transmission power [18]; (5) LoRa uses a long-range start architecture (see Figure 4) in which gateways are used to relay messages between end nodes; (6) LoRa uses an adaptive data rate (ADR) algorithm to estimate the CR and SF parameters under a specific channel.…”

Section: Iot Technologies For Smart Citiesmentioning

confidence: 99%

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A Comprehensive Study of the Use of LoRa in the Development of Smart Cities

Andrade

Yoo

2019

Applied Sciences

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The New Urban Agenda (Agenda 2030) adopted at the United Nations Conference related to Sustainable Urban Development (Habitat III) in the year 2016 has the goal of prompting cities to achieve the identified Sustainable Development Goals by the year 2030. In this context, cities can experiment strategies of circular economy for the optimization of resources, waste reduction, reuse, and recycling. The data generated by the components of an Internet of Things (IoT) ecosystem can contribute in two relevant ways to a smart city model: (1) by the generation of a circular economy and (2) by the creation of intelligence to improve the decision-making processes by citizens or city managers. In this context, it is in our interest to understand the most relevant axes of the research related to IoT, particularly those based on the LoRa technology. LoRa has attracted the interest of researchers because it is an open standard and contributes to the development of sustainable smart cities, since they are linked to the concepts of a circular economy. Additionally, the intention of this work is to identify the technological or practical barriers that hamper the development of solutions, find possible future trends that could exist in the context of smart cities and IoT, and understand how they could be exploited by the industry and academy.

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“…Also, [38] presented the development of relays that communicate with each other using LoRa, which allows for the combination of the cost-effectiveness and ease of wireless networks installation with long range coverage and reliability. In this way, [39] proposed a wireless low-cost solution based on LoRa technology able to communicate with remote PV power plants, covering long distances with minimum power consumption and maintenance.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the Efficiency and Conditions of Induction Motor Operations by Smart Meter Prototype Based on a LoRa Wireless Network

Caño

Sánchez-Sutil

2019

Electronics

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The installation of smart meters in the industry to monitor induction motors (IMs) provides easy access to the measurements of the electrical and mechanical variables, which improves the installation process. Using smart meters in industry requires temporary high-resolution data to improve the energy efficiency (EE) and power factor (PF) of IMs. For these purposes, Long Range (LoRa) is an ideal wireless protocol for the usage in industries due to its low energy consumption. In addition, it provides secure communications and long range indoors and outdoors. LoRa avoids the need to install antennas or routers to extend coverage, as each gateway can service 300 LoRa devices with distances of up to 10 km. For this purpose, this research successfully developed a new prototype for a low-cost IM Efficiency Monitoring System using LoRa (IMEMSL). IMEMSL is based on the Arduino open-source electronic platform. It sends the acquired data through the LoRa low-power wide-area-network (LPWAN) and cloud access gateway. This document describes the hardware and software design and implementation. The experimental results are presented and discussed. Received Signal Strength Indicator (RSSI) and time on air measured endorse the use of LoRa for this type of meters. The approximate cost of the prototype was €72 and €93 for the versions without and with Global Positioning System (GPS), respectively.

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An Alternative Internet-of-Things Solution Based on LoRa for PV Power Plants: Data Monitoring and Management

Cited by 54 publications

References 88 publications

A Remotely Controlled Sea Level Compensation System for Wave Energy Converters

A Remotely Controlled Sea Level Compensation System for Wave Energy Converters

A Comprehensive Study of the Use of LoRa in the Development of Smart Cities

Monitoring of the Efficiency and Conditions of Induction Motor Operations by Smart Meter Prototype Based on a LoRa Wireless Network

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