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Dear Colleagues,

The interconnection of renewable energy sources (RESs) with existing power systems requires advanced control, communication, and computation systems to ensure efficient, stable, and reliable operation. Therefore, control, operation, and planning of power systems are becoming increasingly complicated and require advanced simulation schemes to properly analyze, control, and optimize the impacts of transforming conventional power systems into smart grids, such as massive integration of RESs; the interconnection of new load types, such as plug-in hybrid electric vehicles (PHEVs), to power grids; the evolution of applications of artificial intelligence (AI), etc.

This Special Issue will investigate several key aspects of optimization and control of RESs in smart grids to enable enhanced solutions for intelligent and optimized electricity systems, including (1) modeling of power converters for renewable energy conversion, (2) optimization algorithms for energy management and intelligent control of RESs in smart grids, (3) impact analysis of RESs on power quality, (4) operation, planning, protection, dynamics, and reliability of RESs in smart grids, and (5) big data analysis.

Dr. Fazel Mohammadi
Guest Editor

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Keywords

smart grid
microgrids
renewable energy sources
renewable energy conversion
optimization algorithms
energy management systems
intelligent control
big data

Published Papers (3 papers)

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Research

Jump to: Review

18 pages, 8062 KiB

Open AccessArticle

Multi-Pulse Rectifier Based on an Optimal Pulse Doubling Technique

by Rohollah Abdollahi, Gevork B. Gharehpetian, Fazel Mohammadi and Saravana Prakash P

Energies 2022, 15(15), 5567; https://0-doi-org.brum.beds.ac.uk/10.3390/en15155567 - 31 Jul 2022

Cited by 4 | Viewed by 1465

Abstract

This paper presents pulse multiplication technology based on an optimal Pulse Doubling Technique (PDT) to upgrade a 28-Pulse Rectifier (28-PR) to a 56-PR. The optimal PDT comprises a Tapped Interphase Reactor (TIPR) with a low kVA-rating and two diodes. The number of pulses can be increased from 28 to 56 using the PDT so that the input current harmonics are reasonably mitigated. Additionally, the 14-phase Polygon-Connected Autotransformer (PCA) is designed in such a way that it can be used for retrofit applications. A detailed simulation analysis in the MATLAB/Simulink environment is carried out, and the results show that the improved quality indices of the final AC input and DC output power are equivalent to the IEEE 519-2014 standard and meet sensitive industrial application requirements with an input current Total Harmonic Distortion (THD) lower than 3%. Moreover, the power factor also maintained unity for a wide operating range. The optimal PDT scheme is affordable and easy to implement as only a small-capacity PDT (only 1% of the output power) is needed to double the pulse number. An experimental prototype is developed to verify the simulation results. Full article

(This article belongs to the Special Issue Optimization and Control of Renewable Energy Sources in Smart Grid)

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Review

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25 pages, 4936 KiB

Open AccessReview

Cleaning of Floating Photovoltaic Systems: A Critical Review on Approaches from Technical and Economic Perspectives

by Rafi Zahedi, Parisa Ranjbaran, Gevork B. Gharehpetian, Fazel Mohammadi and Roya Ahmadiahangar

Energies 2021, 14(7), 2018; https://0-doi-org.brum.beds.ac.uk/10.3390/en14072018 - 06 Apr 2021

Cited by 33 | Viewed by 6013

Abstract

There are some environmental factors, such as ambient temperature, dust, etc., which cause a reduction in the efficiency of Photovoltaic (PV) systems. Installation of PV panels on the water surface, commonly known as Floating Photovoltaic (FPV) systems, is one solution to employ PV panels in a cooler environment, achieve higher efficiency, and reduce water evaporation. FPV systems open up new opportunities for scaling up solar generating capacity, especially in countries with high population density and valuable lands, as well as countries with high evaporation rates and water resources deficiency. Since the FPV system is an almost new concept, its cleaning techniques have not been comprehensively studied. While FPV systems are located on the surface of water resources and reservoirs, the water quality can limit the application of different cleaning techniques. Therefore, this paper investigates different techniques of FPV systems cleaning and categorizes them into water-based and water-free approaches. In addition, their cleaning frequencies, as well as economic aspects, are presented and discussed to determine their merits and demerits for using them in FPV systems. Full article

(This article belongs to the Special Issue Optimization and Control of Renewable Energy Sources in Smart Grid)

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9 pages, 326 KiB

Open AccessReview

Emerging Challenges in Smart Grid Cybersecurity Enhancement: A Review

by Fazel Mohammadi

Energies 2021, 14(5), 1380; https://0-doi-org.brum.beds.ac.uk/10.3390/en14051380 - 03 Mar 2021

Cited by 43 | Viewed by 4369

Abstract

In this paper, a brief survey of measurable factors affecting the adoption of cybersecurity enhancement methods in the smart grid is provided. From a practical point of view, it is a key point to determine to what degree the cyber resilience of power systems can be improved using cost-effective resilience enhancement methods. Numerous attempts have been made to the vital resilience of the smart grid against cyber-attacks. The recently proposed cybersecurity methods are considered in this paper, and their accuracies, computational time, and robustness against external factors in detecting and identifying False Data Injection (FDI) attacks are evaluated. There is no all-inclusive solution to fit all power systems requirements. Therefore, the recently proposed cyber-attack detection and identification methods are quantitatively compared and discussed. Full article

(This article belongs to the Special Issue Optimization and Control of Renewable Energy Sources in Smart Grid)

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