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Special Issue "Emerging Challenges in Hosting Capacity Enhancement due to High Penetration of Renewable Energy Resources"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "Energy Economics and Policy".

Deadline for manuscript submissions: 31 August 2019

Special Issue Editors

Guest Editor
Dr. Ahmed Zobaa

Electronic and Computer Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge UB8 3PH, Middlesex, UK
Website | E-Mail
Interests: power quality, (marine) renewable energy, smart grids, energy efficiency, and lighting applications
Guest Editor
Dr. Shady H.E. Abdel Aleem

15th of May Higher Institute of Engineering, Mathematical, Physical and Engineering Sciences Department, Cairo, Egypt.
Website | E-Mail
Interests: power quality, renewable energy, smart grids

Special Issue Information

Dear Colleagues,

Nowadays, there is an unprecedented deployment of large-scale integration of renewable energy sources (RES) in electrical power systems in response to technical, economic, and environmental developments, as well as political and social initiatives. If not properly assessed, excessive RES penetration may lead to various operational problems such as overvoltage, thermal overloading, power-quality problems, and system-protection problems. These problems occur when the system exceeds its hosting capacity (HC) limit. HC research is a key enabler for affordable, reliable, and renewable energy sources, so it is possible to transition away from traditional high-carbon energy sources. Therefore, it is imperative that novel solutions be sought to enable networks to cope with future developments to realize resilient distribution networks that can host the massive RES penetration while ensuring a safe and reliable electrical operation. Uncertainty in the assessment of HC calculations may arise due to many factors such as unknown RES locations and ratings, the intermittent nature of the RES output powers, and the alteration of loads. Accordingly, the HC should be calculated in a probabilistic manner, whereby account accuracy and uncertainty levels are considered. Using an HC approach to drive network requirements could steer DG toward areas of the network where it could have the greatest positive impact on network reliability and win-win benefits with RES owners. Finally, smarter RES integration into future electrical systems can be met if utilities have a clear forecast of their potential network HC. In this Special Issue, we are calling for original contributions that cover emerging challenges in HC studies due to large-scale integration of renewable energy sources. This includes problem descriptions, the application of new optimization methodologies in HC enhancement, uncertainty/sensitivity calculations, case studies, applications, and enhancement technologies.

For more information, check the following link: 

https://www.mdpi.com/journal/energies/special_issues/Hosting_Capacity_Enhancement

Dr. Ahmed F. Zobaa
Dr. Shady H.E. Abdel Aleem
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hosting capacity 
  • renewable energy integration 
  • power quality 
  • smart grids 
  • probabilistic hosting capacity 
  • uncertainty 
  • optimization 
  • decision making 
  • distributed generation 
  • electricity markets

Published Papers (2 papers)

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Research

Open AccessArticle
Comparison of Local Volt/var Control Strategies for PV Hosting Capacity Enhancement of Low Voltage Feeders
Energies 2019, 12(8), 1560; https://doi.org/10.3390/en12081560
Received: 18 March 2019 / Revised: 15 April 2019 / Accepted: 19 April 2019 / Published: 24 April 2019
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Abstract
The PV hosting capacity of low voltage feeders is restricted by voltage and current limits, and in many cases, voltage limit violations are the limiting factor for photovoltaic integration. To control the voltage, local Volt/var control strategies absorb or inject reactive power, provoking [...] Read more.
The PV hosting capacity of low voltage feeders is restricted by voltage and current limits, and in many cases, voltage limit violations are the limiting factor for photovoltaic integration. To control the voltage, local Volt/var control strategies absorb or inject reactive power, provoking an additional current. This study analyzes the hosting capacity increase potential and the associated additional grid losses of local cosφ(P)- and Q(U)-control of photovoltaic inverters, and of local L(U)-control of inductive devices and its combination with Q-Autarkic prosumers. Therefore, four theoretical and one real low voltage test-feeders with distinct structures are considered: long overhead line, short overhead line, long cable, short cable and branched cable. While the theoretical test-feeders host homogeneously distributed PV-plants, the real one hosts heterogeneously distributed PV-plants. Each test-feeder is used to conduct load flow simulations in the presence of no-control and the different control strategies separately, while gradually increasing the PV-penetration. The minimum PV-penetration that provokes voltage or current limit violations is compared for the different control strategies and test-feeders. Simulation results of the theoretical test-feeders show that the hosting capacity increase potential of all local Volt/var control strategies is higher for the overhead line feeders than for the cable ones. Local L(U)-control, especially its combination with Q-Autarkic prosumers, increases the hosting capacity of all low voltage test-feeders significantly. The PV-inverter-based local Volt/var control strategies, i.e., Q(U)- and cosφ(P)-control, enable lower hosting capacity increases; in particular, cosφ(P)-control causes high additional currents, allowing the feeder to host only a relatively small PV-module rating per prosumer. Q(U)- and cosφ(P)-control are not sufficient to increase the hosting capacity of the long cable feeder significantly; they provoke high additional grid losses for the overhead line test-feeders. Meanwhile, L(U)-control, especially its combination with Q-Autarkic prosumers, increases the hosting capacity of the long cable feeder significantly, causing high additional grid losses during peak production of PV-plants. Regarding the real test-feeder with heterogeneously distributed PV-plants, on the one hand, the same trend concerning the HC increase prevails for the real branched cable test-feeder as for the theoretical short cable one. On the other hand, higher losses occur for the branched feeder in the case of L(U)-control and its combination with Q-Autarkic prosumers, due to the lower voltage set-points that have to be used for the inductive devices. All in all, the use of local L(U)-control, whether combined with Q-Autarkic prosumers or not, enables the effective and complete utilization of the existing radial low voltage feeders. Full article
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Open AccessArticle
Probabilistic Hosting Capacity Enhancement in Non-Sinusoidal Power Distribution Systems Using a Hybrid PSOGSA Optimization Algorithm
Energies 2019, 12(6), 1018; https://doi.org/10.3390/en12061018
Received: 25 January 2019 / Revised: 10 March 2019 / Accepted: 11 March 2019 / Published: 15 March 2019
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Abstract
The high penetration of distributed generation (DG) units with their power-electronic interfaces may lead to various power quality problems, such as excessive harmonic distortions and increased non-sinusoidal power losses. In this paper, the probabilistic hosting capacity (PHC) due to the high penetration of [...] Read more.
The high penetration of distributed generation (DG) units with their power-electronic interfaces may lead to various power quality problems, such as excessive harmonic distortions and increased non-sinusoidal power losses. In this paper, the probabilistic hosting capacity (PHC) due to the high penetration of photovoltaic units in a non-sinusoidal power distribution system is investigated. A C-type harmonic filter is proposed, to maximize the harmonic-constrained PHC. An optimization problem is formulated by using a Monte Carlo simulation, taking into account various uncertain parameters, such as the intermittent output power of the DGs, background voltage harmonics, load alteration, and the filter parameters’ variations. In addition, different operational constraints have been considered, such as the bus voltage, line thermal capacity, power factor, and individual and total harmonic distortion limits. A swarm-based, meta-heuristic optimization algorithm known as the hybrid particle swarm optimization and gravitational search algorithm (PSOGSA) has been examined for the optimal design of the proposed filter. Besides, other optimization algorithms were examined for validation of the solution. The PHC results obtained are compared with the conventional deterministic HC (DHC) results, and it is found that the PHC levels are higher than those obtained by conservative HC procedures, practical rules of thumb, and the DHC approaches. Full article
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