Special Issue "Integration of Large-Scale Renewable Energy Sources into the Low-Inertia Power Grid"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "Smart Grids and Microgrids".

Deadline for manuscript submissions: 31 July 2020.

Special Issue Editor

Dr. Edris Pouresmaeil
E-Mail Website
Guest Editor
Department of Electrical Engineering and Automation, Aalto University, Office 3563, Maarintie 8, 02150 Espoo, Finland
Interests: integration of renewable energy sources into the power grid; power converters and applications of power converters in power systems; dynamic modeling and analysis of power electronic converters and systems; stability analysis of power converters in power system; microgrids operation and control; smart grid systems and technologies
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Special Issue Information

Dear Colleagues,

The role of renewable energy sources in the power system is growing fast due to its contributions to reducing the greenhouse gas emissions, promoting long-term energy security, and thr expansion of energy access to new energy consumers in the developing world. However, the high penetration of renewable energy sources remains a challenge in electricity networks. Their stochastic behavior and variable output impose real-time balancing challenges in the power system, which makes it necessary to increase the power reserves provided by conventional power stations. In addition, these energy sources used to be connected to the power grids by means of power electronics converters, which in contrast to synchronous generators do not inherently stabilize the power system. This Special Issue deals with the operation and control of interfaced converters between renewable energy resources and power grids to guarantee the stability of power grids under the high penetration of renewable energy resources.

Prof. Dr. Edris Pouresmaeil
Guest Editor

Manuscript Submission Information

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Keywords

  • renewable energy (RE) power systems 
  • distributed generation (DG) technologies 
  • modeling, design, analysis, and control of converters for renewable energy conversion and their interconnections 
  • grid support functions and ancillary services from renewable energies (REs) power plants, centralized, decentralized, and distributed algorithms 
  • microgrid modeling and stability analysis 
  • design and control of intelligent power plants for the future power grids 
  • smart control and innovative hardware solutions for large-scale grid integration of distributed generation and flexible loads
  • stability analysis of power grids under high penetration of renewable energy sources 
  • analysis and control of dc and hybrid ac/dc power networks

Published Papers (5 papers)

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Research

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Open AccessArticle
A Modified Partial Power structure for Quasi Z-Source Converter to Improve Voltage Gain and Power Rating
Energies 2019, 12(11), 2139; https://doi.org/10.3390/en12112139 - 04 Jun 2019
Abstract
Employing partial power processing (PPP) technique for quasi Z-source converter (QZSC) a new structure of the converter is presented. Using PPP technique although eliminates electrical insolation, but permits reducing voltage and current stress at the semiconductors, if compared with full power proposals. In [...] Read more.
Employing partial power processing (PPP) technique for quasi Z-source converter (QZSC) a new structure of the converter is presented. Using PPP technique although eliminates electrical insolation, but permits reducing voltage and current stress at the semiconductors, if compared with full power proposals. In this work, two PPP structures are discussed: A first one, similar to the basic topology, where the output voltage of the power converter is in series with the input voltage; and a second one, where the output is in series with the capacitor of the QZSC. This minor modification, which requires no extra elements, improves the power rating, voltage gain, and requires a lower transformation ratio. An experimental prototype of the proposed converter has been tested and the results are compared with other implementations, permitting to validate the theoretical analysis as well as the advantages that this proposal provides. Full article
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Open AccessArticle
A New Modular Multilevel Inverter Based on Step-Up Switched-Capacitor Modules
Energies 2019, 12(3), 524; https://doi.org/10.3390/en12030524 - 07 Feb 2019
Cited by 4
Abstract
A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one [...] Read more.
A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one DC voltage source. The proposed topology generates a sinusoidal output waveform with a magnitude several times greater than the input one. Higher output staircase AC voltage is obtained by applying a nearest level control (NLC) modulation technique. The most significant features of this configuration can be mentioned as: fewer semiconductor devices, remarkably low total harmonic distortion (THD), desirable operating under high/low frequency, high efficiency, inherent bipolar voltage production, easy circuit expansion, ease of control and size reduction of the circuit thanks to utilizing neither bulky transformer nor inductor. Moreover, the proposed SCMLI is comprehensively surveyed through theoretical investigation and a comparison of its effectiveness to recent topologies. Eventually, the operating principle of a 25-level prototype of the suggested SCMLI is validated by simulation in the MATLAB SIMULINK environment and experimental results. Full article
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Open AccessArticle
Design and Implementation of a New Algorithm for Enhancing MPPT Performance in Solar Cells
Energies 2019, 12(3), 519; https://doi.org/10.3390/en12030519 - 06 Feb 2019
Cited by 3
Abstract
This paper presents a new algorithm for improving the maximum power point tracking method in solar cells. The perturb and observe and the constant voltage algorithms are combined intelligently in order to have a fast response and a high power efficiency. Furthermore, a [...] Read more.
This paper presents a new algorithm for improving the maximum power point tracking method in solar cells. The perturb and observe and the constant voltage algorithms are combined intelligently in order to have a fast response and a high power efficiency. Furthermore, a two-phase interleaved boost converter with a coupled inductor is used with the proposed algorithm. The input capacitor and inductor of this converter are much smaller than those of the conventional types of converters. Therefore, its inherent delay is too short. Computer simulations carried out in PowerSIM and experimental results using a 100 W prototype verify the superior performance of the proposed algorithm and converter. The operating principle and comparisons with the conventional algorithms and other methods are presented in this paper. Moreover, a cost function is presented to compare the new algorithm with the others. The experimental results show that the presented system tracks any changes in power in less than 10 ms, and a quick response to the maximum power point is achieved. Full article
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Open AccessArticle
An Innovative Dual-Boost Nine-Level Inverter with Low-Voltage Rating Switches
Energies 2019, 12(2), 207; https://doi.org/10.3390/en12020207 - 09 Jan 2019
Cited by 2
Abstract
This article presents an innovative switched-capacitor based nine-level inverter employing single DC input for renewable and sustainable energy applications. The proposed configuration generates a step-up bipolar output voltage without end-side H-bridge, and the employed capacitors are charged in a self-balancing form. Applying low-voltage [...] Read more.
This article presents an innovative switched-capacitor based nine-level inverter employing single DC input for renewable and sustainable energy applications. The proposed configuration generates a step-up bipolar output voltage without end-side H-bridge, and the employed capacitors are charged in a self-balancing form. Applying low-voltage rated switches is another merit of the proposed inverter, which leads to extensive reduction in total standing voltage. Thereby, switching losses as well as inverter cost are reduced proportionally. Furthermore, the comparative analysis against other state-of-the-art inverters depicts that the number of required power electronic devices and implementation cost is reduced in the proposed structure. The working principle of the proposed circuit along with its efficiency calculations and thermal modeling are elaborated in detail. In the end, simulations and experimental tests are conducted to validate the flawless performance of the proposed nine-level topology in power systems. Full article
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Review

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Open AccessReview
Integration of Large Scale PV-Based Generation into Power Systems: A Survey
Energies 2019, 12(8), 1425; https://doi.org/10.3390/en12081425 - 13 Apr 2019
Cited by 6
Abstract
This paper reports a general overview of current research on analysis and control of the power grid with grid scale PV-based power generations as well as of various consequences of grid scale integration of PV generation units into the power systems. Moreover, the [...] Read more.
This paper reports a general overview of current research on analysis and control of the power grid with grid scale PV-based power generations as well as of various consequences of grid scale integration of PV generation units into the power systems. Moreover, the history of PV renewable growth, deregulation of power system and issues related to grid-connected PV systems considering its contribution to various responsibilities like frequency control, virtual inertia capabilities and voltage regulation are discussed. Moreover, various outcomes of the high-penetrated grid with PV power plants such as power quality, active and reactive power control, protection, balancing and reliability under various loading conditions are reviewed and discussed. Full article
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