{"title":"The use of innovative tools in the medium voltage grid development, a case study of series voltage regulator","authors":"B. Tőzsér, I. Táczi, A. Torok","doi":"10.24084/repqj21.409","DOIUrl":"https://doi.org/10.24084/repqj21.409","url":null,"abstract":"The rapid technological improvements concerning the renewable energy sources and the energy policy of the European Union, and the National Energy Strategy are leading to a rapid increase in the number of intermittent renewable power plants. Thus, new challenges emerge in the operation of the distribution system. To operate the system efficiently, the use of innovative technologies must be considered, because conventional network development strategies cannot always provide an optimal solution for the problem. This paper analyses the effects of largescale wind power generation on a medium voltage system and a solution of the problems faced through a case study of a serial voltage regulator. The difference between the profiles of generation and loads causes the residential transformers at the end of the line to encounter large, more than 8% voltage fluctuation. To assess the site’s voltage profile, time series symmetrical load flow calculations were performed. After the thorough analysis of the circumstances a serial voltage regulator device was implemented at 3 different nodes of the system and a placement analysis was carried out with statistical tools. The results showed a 3% decrease in the voltage fluctuation at the end of the line even when the device was far from these nodes; and with an optimal placement, the device could halve the largest voltage fluctuation on the line.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82807066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Mokrani, Djamila Rekioua, N. Mebarki, A. Oubelaid, K. Kakouche, T. Rekioua
{"title":"Power management strategy for photovoltaic system with hybrid storage (Batteries/Supercapacitors)","authors":"Z. Mokrani, Djamila Rekioua, N. Mebarki, A. Oubelaid, K. Kakouche, T. Rekioua","doi":"10.24084/repqj21.343","DOIUrl":"https://doi.org/10.24084/repqj21.343","url":null,"abstract":"This paper is presented in regard to the interesting continuous interest attributed to photovoltaic energy systems (PESs). To this aim, a study of an isolated photovoltaic system with hybrid storage (HS) is presented. Supercapacitors (SCs) are typically used because of their high specific power density.. Combining batteries and supercapacitors is a solution to maximize their benefits. In this work, the HS is a combinaison of batteries and supercapacitors. The goal of this work is to build a new management algorithm. This aforementioned technique will ensure the control of energy flow between system power sources. Furthermore, it will regulate the charge/discharge cycles of the proposed HS by maintaining their state of charge (SOC) between a desired minimum and maximum values. The proposed method is simple, efficient and it is not computationally heavy. The obtained simulation results are satisfactory and show the interest and effectiveness of the proposed management strategy.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86153905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Andrada-Monrós, E. Peñalvo-López, I. Valencia-Salazar, J. Cárcel-Carrasco
{"title":"Review of the Energy transition assessment methods in touristic municipalities","authors":"C. Andrada-Monrós, E. Peñalvo-López, I. Valencia-Salazar, J. Cárcel-Carrasco","doi":"10.24084/repqj21.348","DOIUrl":"https://doi.org/10.24084/repqj21.348","url":null,"abstract":"Initiatives have been launched by the EU to address climate change, including those aimed at islands and municipalities. Analysing the impact of the energy transition through modelling is essential for the strategic decision-making process to move forward to the ET. The new energy model requires municipalities to be key drivers, although their needs are very specific and depend on external factors such as their own governance. In the case of municipalities located on tourist islands, the need for tools and support for the creation of energy and sustainable transition plans is even more evident. Currently, methods and models have been developed for energy planning or for the assessment of different energy scenarios, but there is no model that integrates a multidimensional approach at the municipal level, enhances the decisions of policymakers, integrates a knowledge base specifically focused on islands and monitors the progress of local measures through energy indicators. This paper reviews the state of existing decisionmaking models and energy tools, specifically those aimed at islands and policymakers, and identifies the gaps to generate added value to facilitate the path to ET for island tourist municipalities and monitor their progress.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"211 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80661010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Output voltage control of the OVT inverter","authors":"J. Iwaszkiewicz, A. Muc","doi":"10.24084/repqj21.456","DOIUrl":"https://doi.org/10.24084/repqj21.456","url":null,"abstract":"The paper presents the possibility of the output voltage control of an OVT inverter. The idea of the OVT inverter construction is based on the orthogonal space vectors theory. The OVT inverter is built of two components two-level three-phase inverters: the main inverter (MI) and the auxiliary one (AI). The output voltage of the OVT inverter takes the shape of a stepped voltage analogous to the voltage generated by multilevel inverters. The paper demonstrates possible control methods of the output voltage frequency and amplitude. The results obtained during simulation studies prove that the output voltage essential parameters may be a function of the DC voltage and the control circuitry permits easy defining a selection of voltage/frequency characteristics.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83284299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pablo Horrillo-Quintero, Pablo García-Triviño, Raúl Sarrias-Mena, C. García-Vázquez, Luis M. Fernández‐Ramírez
{"title":"Power Sharing Control for a Microgrid with PV Power Plants, Batteries and Quasi-Z-source Cascaded H-bridge Multilevel Inverter","authors":"Pablo Horrillo-Quintero, Pablo García-Triviño, Raúl Sarrias-Mena, C. García-Vázquez, Luis M. Fernández‐Ramírez","doi":"10.24084/repqj21.457","DOIUrl":"https://doi.org/10.24084/repqj21.457","url":null,"abstract":"In recent years, Quasi-Z-source cascaded H-bridge multilevel inverters (qZS-CHBMLIs) have become an interesting solution for integrating renewable energy into the utility grid. The possibility of performing power conversion in a single stage, without an additional DC/DC converter, and a higher voltage gain, are their main advantages over traditional inverters. In addition, individual control of the maximum power point tracking (MPPT) can be achieved for each PV plant. Owing to the intermittent nature of PV power plants, battery energy storage systems (BESS) are commonly used to smooth out PV power fluctuations. This paper presents a control system for the active and reactive power delivered to the grid according to the system operator references and an EMS for an ES-qZS-CHBMLI. The BESS is coordinated through an energy management system (EMS) based on the state of charge (SOC) The system is evaluated under two different operation modes. One of them, where the PV power plants operate according to their MPP and the other in which the MPPT faults and thus, the PV power is decreased. A MATLAB-Simulink simulation is used to validate the proposed control system for a grid-connected single-phase configuration based on a qZSCHBMLI with three cascade qZSI, each connected to a 4.8 kW PV power plant and a BESS.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90901584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Benchmark and Validation Guide for the Hungarian Implementation of the Common European Requirements for Electricity Generators","authors":"I. Vokony","doi":"10.24084/repqj21.288","DOIUrl":"https://doi.org/10.24084/repqj21.288","url":null,"abstract":"In the Hungarian electricity system, as well as in other European countries, the share of renewable based production is increasing. These power generating modules do not contain rotating masses like those of traditional synchronous power generating modules which creates new challenges on the electric grid with respect to system stability and frequency control. The distribution system operators (DSOs) of the different countries need to cope with this problem and set frequency, voltage thresholds and robustness requirements for the electricity generating power plants. This project aims to create specific requirements for the Hungarian generators considering the former implementations of other countries (UK, Germany, Denmark and Finland). The different requirements of these foreign areas are introduced in a benchmark study, which is the first essential part of the whole project. Such implementations are only partially defined for Hungary; therefore, in some cases it is necessary to use the implementations of other foreign countries which have similar grid characteristics and are dealing with the same control and operation challenges. Another important milestone of this work besides the benchmark study is to present a validation guide for the Hungarian transmission system operator (TSO) that can be sent directly to the operators of electric power generating modules with six different types. These guides contain compliance tests for the power plants to examine whether they meet the requirements of grid connection or not.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"95 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83928484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hussein K. Mohammad, S. Jali, Arz Qwam Alden, V. Kilchyk, B. Shrestha
{"title":"Experimental and Numerical Investigation of Channeling Effects on Noise and Aerodynamic Performance of NACA 0012 Aerofoil in Wind Turbine Applications","authors":"Hussein K. Mohammad, S. Jali, Arz Qwam Alden, V. Kilchyk, B. Shrestha","doi":"10.24084/repqj21.328","DOIUrl":"https://doi.org/10.24084/repqj21.328","url":null,"abstract":"Wind power is considered one of the main sources of renewable energy in the market today. In this study, different sizes and directions of channels were created inside the NACA 0012 aerofoil, and the effect of these channels were investigated on aerodynamic noise and aerodynamic performance, experimentally and numerically. The results have shown several factors that could affect the aerodynamic noise such as flow velocity, angle of attack, and trailing edge blowing injection. The study also concluded an increase in drag coefficients and a decrease in lift coefficients for all channeled samples compared to the regular aerofoil. In contrast to the studies that showed improvements in the aerodynamic performance of supersonic channeled aerofoils, this study done under subsonic flow showed an increase in drag and decrease in lift.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77027801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Fernández-Leal, L. Castro-Santos, P. Rubial-Yáñez, I. Lamas-Galdo, D. Cordal Iglesias, A. Alcayde, F. G. Montoya, A. Filgueira-Vizoso
{"title":"A tool to select offshore renewable energy facilities. The case of study of shipyards and ports in Spain","authors":"F. Fernández-Leal, L. Castro-Santos, P. Rubial-Yáñez, I. Lamas-Galdo, D. Cordal Iglesias, A. Alcayde, F. G. Montoya, A. Filgueira-Vizoso","doi":"10.24084/repqj21.215","DOIUrl":"https://doi.org/10.24084/repqj21.215","url":null,"abstract":"The objective of this work is to create a tool that serves to know the possibilities of manufacturing, storage, assembly, and maintenance of floating marine structures trying to take advantage of the ports and shipyards of Spain. This would help reduce costs and could make this type of energy more profitable. To this end, all the Spanish ports and shipyards have been analyzed, considering the characteristics and possibilities of each of them. In the study, those that did not meet certain essential conditions for the manufacture, storage, assembly, and maintenance of power generation equipment have been discarded.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80222214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Verification of the uninterrupted transition from grid parallel to island grid operation of the Virtual Synchronous Machine in a microgrid","authors":"Steven Reineke, D. Turschner, I. Hauer, H. Beck","doi":"10.24084/repqj21.236","DOIUrl":"https://doi.org/10.24084/repqj21.236","url":null,"abstract":"The classic energy supply system is mainly based on the stabilising properties of electromechanical synchronous generators. The structural change of the electrical energy supply system towards a decentralised grid structure means that ancillary services must now also be provided at the distribution grid level. The Virtual Synchronous Machine (VISMA) was developed at the Institute of Electrical Power Engineering at the Clausthal University of Technology with the aim of making a decentralised generation unit in the grid behave like a real synchronous machine and thus actively provide relevant ancillary services. The VISMA is based on a three-phase inverter that can comply with grid requirements by adding an energy storage device in the DC link and using a special control algorithm. The focus of the investigations shown here is on the uninterrupted transition from grid-parallel operation of the VISMA to island grid operation and the subsequent stable continued operation of this island grid. A controller changeover, as most feed-in inverters would require in order to change the operating mode, is not necessary here. It is shown that the transients have subsided after 5 ms, which means that the VISMA has completely taken over the","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90205896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
W. Hamanah, Abdullah Baraean, A. Hussein, M. A. Abido
{"title":"Stabilizing multimachine power systems with fuzzy logic using artificial bee colonies","authors":"W. Hamanah, Abdullah Baraean, A. Hussein, M. A. Abido","doi":"10.24084/repqj21.258","DOIUrl":"https://doi.org/10.24084/repqj21.258","url":null,"abstract":"Over the past few years, fuzzy logic systems have gained popularity due to their superiority over classical controllers when it comes to enhancing the transient stability of power systems. In this paper, a Fuzzy Logic Power System Stabilizer (FLPSS) is designed to damp local and inter-area oscillations following disturbances through the use of an Artificial Bee Colony Optimization Algorithm (ABC). The designed FLPSS is expected to significantly increase the robustness of power systems and ultimately improve the quality of power supply to end-users. This test system consists of two areas with four machines and eleven buses, with the purpose of evaluating the performance of the ABC-FLPSS under a variety of disturbances and loads. In order to optimize the scaling factors of FLPSSs, the Integral Squared Error (ISE) of rotor speed deviation is formulated as an objective function. Evaluation of the proposed controller involves simulating the test system under different conditions. These conditions range from small perturbations, such as changes in one of the system parameters, to large changes, such as removing a main transmission line, to determine its effectiveness. A comparison of ABC-FLPSS with FLPSS and Conventional Power System Stabilizer (CPSS) shows that the ABC-FLPSS controller is superior to FLPSS and CPSS.","PeriodicalId":21076,"journal":{"name":"Renewable Energy and Power Quality Journal","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78849050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}