Design of a Partially Grid-Connected Photovoltaic Microgrid Using IoT Technology

This study describes the design and control algorithms of an IoT-connected photovoltaic microgrid operating in a partially grid-connected mode. The proposed architecture and control design aim to connect or disconnect non-critical loads between the microgrid and utility grid. Different components of the microgrid, such as photovoltaic arrays, energy storage elements, inverters, solid-state transfer switches, smart-meters, and communication networks were modeled and simulated. The communication between smart meters and the microgrid controller is designed using LoRa communication protocol for the control and monitoring of loads in residential buildings. An IoT-enabled smart meter has been designed using ZigBee communication protocol to evaluate data transmission requirements in the microgrid. The loads were managed by a proposed under-voltage load-shedding algorithm that selects suitable loads to be disconnected from the microgrid and transferred to the utility grid. The simulation results showed that the duty cycle of LoRa and its bit rate can handle the communication requirements in the proposed PV microgrid architecture.

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Performance analyses of the communication networks of a modern supervision and control system of research reactors

Kerntechnik ◽

10.3139/124.110006 ◽

2009 ◽

Vol 74 (1-2) ◽

pp. 42-46

Author(s):

E. I. El-Madbouly ◽

M. K. Shaat ◽

A. M. Shokr ◽

G. H. Elrefaei

Keyword(s):

Control System ◽

Communication Networks ◽

Research Reactors ◽

Performance Analyses ◽

And Control

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Machine Learning Algorithms for Short-Term Load Forecast in Residential Buildings Using Smart Meters, Sensors and Big Data Solutions

IEEE Access ◽

10.1109/access.2019.2958383 ◽

2019 ◽

Vol 7 ◽

pp. 177874-177889 ◽

Cited By ~ 10

Author(s):

Simona-Vasilica Oprea ◽

Adela Bara

Keyword(s):

Machine Learning ◽

Big Data ◽

Residential Buildings ◽

Learning Algorithms ◽

Machine Learning Algorithms ◽

Short Term ◽

Smart Meters ◽

Load Forecast

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Polarization-transparent silicon photonic add-drop multiplexer with wideband hitless tuneability

Nature Communications ◽

10.1038/s41467-021-24640-5 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Francesco Morichetti ◽

Maziyar Milanizadeh ◽

Matteo Petrini ◽

Francesco Zanetto ◽

Giorgio Ferrari ◽

...

Keyword(s):

Optical Networks ◽

Communication Networks ◽

Bandwidth Allocation ◽

Core Networks ◽

Reconfigurable Devices ◽

Silicon Photonic ◽

Transmission Quality ◽

And Control ◽

Integrated Device ◽

Dynamic Bandwidth

AbstractFlexible optical networks require reconfigurable devices with operation on a wavelength range of several tens of nanometers, hitless tuneability (i.e. transparency to other channels during reconfiguration), and polarization independence. All these requirements have not been achieved yet in a single photonic integrated device and this is the reason why the potential of integrated photonics is still largely unexploited in the nodes of optical communication networks. Here we report on a fully-reconfigurable add-drop silicon photonic filter, which can be tuned well beyond the extended C-band (almost 100 nm) in a complete hitless (>35 dB channel isolation) and polarization transparent (1.2 dB polarization dependent loss) way. This achievement is the result of blended strategies applied to the design, calibration, tuning and control of the device. Transmission quality assessment on dual polarization 100 Gbit/s (QPSK) and 200 Gbit/s (16-QAM) signals demonstrates the suitability for dynamic bandwidth allocation in core networks, backhaul networks, intra- and inter-datacenter interconnects.

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Autonomous Underwater Vehicles and Field of View in Underwater Operations

Journal of Marine Science and Engineering ◽

10.3390/jmse9030277 ◽

2021 ◽

Vol 9 (3) ◽

pp. 277

Author(s):

Isaac Segovia Ramírez ◽

Pedro José Bernalte Sánchez ◽

Mayorkinos Papaelias ◽

Fausto Pedro García Márquez

Keyword(s):

Autonomous Underwater Vehicles ◽

Underwater Vehicles ◽

Field Of View ◽

Guidance System ◽

Control Algorithms ◽

Deep Waters ◽

Underwater Cameras ◽

Optimal Resolution ◽

Acquisition Processes ◽

And Control

Submarine inspections and surveys require underwater vehicles to operate in deep waters efficiently, safely and reliably. Autonomous Underwater Vehicles employing advanced navigation and control systems present several advantages. Robust control algorithms and novel improvements in positioning and navigation are needed to optimize underwater operations. This paper proposes a new general formulation of this problem together with a basic approach for the management of deep underwater operations. This approach considers the field of view and the operational requirements as a fundamental input in the development of the trajectory in the autonomous guidance system. The constraints and involved variables are also defined, providing more accurate modelling compared with traditional formulations of the positioning system. Different case studies are presented based on commercial underwater cameras/sonars, analysing the influence of the main variables in the measurement process to obtain optimal resolution results. The application of this approach in autonomous underwater operations ensures suitable data acquisition processes according to the payload installed onboard.

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Design and Research on Power Systems and Algorithms for Controlling Electric Underground Mining Machines Powered by Batteries

Energies ◽

10.3390/en14134060 ◽

2021 ◽

Vol 14 (13) ◽

pp. 4060

Author(s):

Artur Kozłowski ◽

Łukasz Bołoz

Keyword(s):

Power Systems ◽

Power Supply ◽

Internal Combustion Engines ◽

Underground Mining ◽

Test Stand ◽

Research Network ◽

Control Algorithms ◽

Systems And Control ◽

And Control ◽

Supply Systems

This article discusses the work that resulted in the development of two battery-powered self-propelled electric mining machines intended for operation in the conditions of a Polish copper ore mine. Currently, the global mining industry is seeing a growing interest in battery-powered electric machines, which are replacing solutions powered by internal combustion engines. The cooperation of Mine Master, Łukasiewicz Research Network—Institute of Innovative Technologies EMAG and AGH University of Science and Technology allowed carrying out a number of works that resulted in the production of two completely new machines. In order to develop the requirements and assumptions for the designed battery-powered propulsion systems, underground tests of the existing combustion machines were carried out. Based on the results of these tests, power supply systems and control algorithms were developed and verified in a virtual environment. Next, a laboratory test stand for validating power supply systems and control algorithms was developed and constructed. The tests were aimed at checking all possible situations in which the battery gets discharged as a result of the machine’s ride or operation and when it is charged from the mine’s mains or with energy recovered during braking. Simulations of undesirable situations, such as fluctuations in the supply voltage or charging power limitation, were also carried out at the test stand. Positive test results were obtained. Finally, the power supply systems along with control algorithms were implemented and tested in the produced battery-powered machines during operational trials. The power systems and control algorithms are universal enough to be implemented in two different types of machines. Both machines were specially designed to substitute diesel machines in the conditions of a Polish ore mine. They are the lowest underground battery-powered drilling and bolting rigs with onboard chargers. The machines can also be charged by external fast battery chargers.

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Daylighting Strategies in Iranian Vernacular Residential Buildings in Hot and Dry Climate

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.747.329 ◽

2015 ◽

Vol 747 ◽

pp. 329-332

Author(s):

Elham Maghsoudi Nia ◽

Titi Hajihasani ◽

Mohd Yazid Mohd Yunos ◽

Nordin Abdul Rahman

Keyword(s):

Energy Efficiency ◽

Significant Role ◽

Residential Buildings ◽

Design Phase ◽

Review Of Literature ◽

Shading Devices ◽

And Control

Daylighting strategies and control of it, plays a significant role in energy efficiency and provision of visual comforts in buildings. This study conducted a review of literature and observation in a hot and dry region of Iran in order to investigate daylighting strategies and control of it by shading devices in the vernacular residential buildings. The results show thatdaylight in vernacular rooms was provided through door, window, Rozan, Moshabak, and Goljam. These components were equipped with thevertical and horizontalshading devices such as Orsi, Sarsayeh, Tabeshband and Kharakpoushto control the sunlight. The vernacular lighting strategy was in response to the energy efficiency and provided visual comfort.The vernacular concepts and schemes still can be adopted and reused by architects and developers. The study recommends appropriate daylight schemes and shading devices in design phase to achieve energy efficiency in new residential buildings.

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Design and Simulation of Pedal Simulator in Brake by Wire System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.556-562.1358 ◽

2014 ◽

Vol 556-562 ◽

pp. 1358-1361 ◽

Cited By ~ 1

Author(s):

Wen Bo Zhu ◽

Fen Zhu Ji ◽

Xiao Xu Zhou

Keyword(s):

Simulation Models ◽

Control Algorithms ◽

Brake Pedal ◽

Braking System ◽

Pedal Force ◽

Performance Requirements ◽

System A ◽

Pedal Feel ◽

And Control ◽

Wire System

Wire of the brake pedal is not directly connected to the hydraulic environment in the braking By-wire system so the driver has no direct pedal feel. Then pedal simulator is an important part in the brake-by-wire system. A pedal force simulator was designed based on the traditional brake pedal curve of pedal force and pedal travel, AMESim and Matlab / Simulink were used as a platform to build simulation models and control algorithms. The simulation results show that the pedal stroke simulator and the control strategy meet the performance requirements of traditional braking system. It can be used in brake by wire system.

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Comparative studies of the set up of two-dimensional pneumatic arm systems by muscle and rotational actuators

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1243/09596518jsce413 ◽

2007 ◽

Vol 221 (5) ◽

pp. 743-748 ◽

Cited By ~ 1

Author(s):

Y-T Wang ◽

R-H Wong ◽

J-T Lu

Keyword(s):

Control Systems ◽

Fuzzy Controller ◽

Control Algorithms ◽

Two Dimensional ◽

Pneumatic Control ◽

Learning Mechanism ◽

Set Up ◽

And Control ◽

Self Learning ◽

System Characteristics

As opposed to traditional pneumatic linear actuators, muscle and rotational actuators are newly developed actuators in rotational and specified applications. In the current paper, these actuators are used to set up two-dimensional pneumatic arms, which are used mainly to simulate the excavator's motion. Fuzzy control algorithms are typically applied in pneumatic control systems owing to their non-linearities and ill-defined mathematical model. The self-organizing fuzzy controller, which includes a self-learning mechanism to modify fuzzy rules, is applied in these two-dimensional pneumatic arm control systems. Via a variety of trajectory tracking experiments, the present paper provides comparisons of system characteristics and control performances.

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