Iran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Presenting a new structure for interlinking converter in hybrid AC-DC microgrids to improve voltage quality11110238510.22109/jemt.2020.201442.1197ENSeyed HosseinTabatabaeiFaculty of electrical and computer engineering, University of
Birjand, Birjand, Iran0000-0002-0621-3213Hamid RezaNajafiFaculty of electrical and computer engineering, University of
Birjand, Birjand, IranHussainEliasiFaculty of electrical and computer engineering, University of
Birjand, Birjand, IranAlirezaJalilianDepartment of Electrical Engineering, Center of Excellence for Power System Automation and Operation, University of Science and Technology, Tehran, IranJournal Article20190914In this paper, a new structure is presented for an interlinking converter (IC) to improve voltage in hybrid AC-DC microgrids. This structure consists of a series IC (SIC) and a parallel IC (PIC) parts. The PIC is responsible for ex-changing the power between sub-grids and decreasing voltage unbalance indices. Based on the free capacity of PIC, voltage unbalance compensation reference is calculated on the AC sub-grid side. In the series part of IC, any kind of voltage disturbance is compensated for the sensitive load. In order to increase the speed of dynamic response and to decrease the loss in SIC, the resistor of output filter is removed and then, fluctuations are damped in an active way in the control system. This is carried out by feeding back the current of the capacitor of the output filter and applying it to the control system and using the current mode control in the inner loop which improves the stability. Proportional-resonant and proportional-differential controllers are used in the control part of SIC. Therefore, proper tracking of the reference signal is guaranteed. Results obtained from the simulation of the case study system in MATLAB software verify the capabilities of the proposed approach.https://www.jemat.org/article_102385_cc3ba65c27ad209e2a2c431e7b1ed69e.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201New switched-capacitor multilevel converter with reduced elements122010316710.22109/jemt.2020.199538.1193ENAmirGallajDepartment of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, IranMojtabaBeiraghiDepartment of Electrical Engineering, Urmia Branch, Islamic Azad University, Urmia, IranJaberFallah ArdashirDepartment of Electrical Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran0000-0002-2286-899XRezaGhanizadehDepartment of electrical engineering, Urmia branch, Islamic Azad University, Urmia, Iran0000-0003-2093-0267Journal Article20190831This paper presents a new switched-capacitor multilevel converter (SCMC) which is able to produce any levels at output voltage waveform. This topology can increase the value of input dc voltage sources using the switched-capacitor units. In the proposed SCMC topology, as the numbers of switched-capacitor units increase, the voltage gain and the number of generated levels will be increased. In this paper, the main merit of proposed SCMC topology is inherent voltage balancing of capacitors which do not require complicated switching strategy. The proposed SCMC structure is compared with traditional multilevel converters. The comparison results verify that the presented SCMC structure needs lower dc voltages sources, switches, and capacitors. The mathematical analysis of standing voltage on switches and different kinds of power losses in the presented SCMC structure are provided. In order to verify the performance of presented SCMC topology, the experimental results for a typical 13-level converter is provided.https://www.jemat.org/article_103167_f3904a73094a38c26de78d122d639ab1.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Modeling and Investigation of Gas Turbines Heat Recovery in the Semnan Oil Pumping Station for Heating Gas-Oil to Reduce Energy Consumption of Pumping212710487710.22109/jemt.2020.211562.1214ENMohsenShahabiMSc in Energy Systems Engineering, Iran Petroleum Pipeline and Telecommunication Company, North East RegionHassan AliOzgoliDepartment of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran.AbbasAkbarniaAssociate Professor, Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, IranJournal Article20191224This paper proposed the effect of using a heat recovery system in the gas turbines of Semnan to shahroud oil pumping station in energy conservation point of view. Heating the transferred fluids is one of the common approaches to reduce fluids viscosity and energy consumption, respectively. Due to the low efficiency of station turbines compared to modern turbines, it is expected that the use of heat recovery has a positive effect on improving station performance. By analyzing the combustion products of the gas turbine at the station, the heat extracted from the exhaust gas flow has been calculated which is consumed in the recovery boiler. The pipeline application process including recovery boiler and main equipment of Semnan and Shahroud pumping stations have been modeled. By applying the model, it found that the amount of energy savings by gas-oil heating using a heat exchanger equals to 395311 m3 natural gas in annually. Therefore, optimal points of using combustion heat in the gas turbine output were obtained. In addition, the reduction of power consumption in the presented station has been calculated. Economic calculations were carried out for different countries including Iran, Scandinavian countries, China and the Europian Union average, based on their energy prices and bank interest rates.https://www.jemat.org/article_104877_a92681601cab16f674bb6e35b9fb27ca.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Non-Contact AC Current Measurement Using Vibration Analysis of a MEMS Piezoelectric Cantilever Beam283510258610.22109/jemt.2020.194283.1188ENEasaAliAbbasiMechatronics Engineering Department, University of Tabriz, Tabriz, IranAkbarAllahverdizadehMechatronics Engineering Department, University of Tabriz, Tabriz, IranBehnamDadashzadehMechatronics Engineering Department, University of Tabriz, Tabriz, IranRezaJahangiriDepartment of Mechanical Engineering, Islamic Azad University, Salmas, IranJournal Article20190714This paper presents a non-contact system to measure electrical current crossing a wire. To do so, design and simulation of a piezoelectric cantilever beam with a tip mass is presented using mathematical modeling. The sandwich cantilever beam is composed of two piezoelectric layers and a mid-layer made up of steel. For mathematical modeling, the governing differential equation of the beam is extracted and solved by Galerkin method. Then the output voltage is calculated for different values of external forces. The force applied to the tip mass from the magnetic field of wire is used as external excitation force of the beam. According to the response of the output voltage, the current crossing the wire is calculated. Validation of the model is demonstrated compared to other references. In results section, frequency response behavior and influence of the geometric parameters on output voltage are analyzed. Appropriate values of these parameters should be used in design process of this non-contact sensor to have an observable applied force from the current carrying wire.https://www.jemat.org/article_102586_970ffd48baa47fef0955d09e4f08a1fb.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201The impacts of the novel corona virus on the oil and electricity demand in Iran and China364810582310.22109/jemt.2020.222593.1232ENNimaNorouziEnergy engineering, Amirkabir university, Tehran, IranMaryamFaniEnergy, Amirkabir university of tech., tehran, iranJournal Article20200306Despite significant medical advances in the past centuries, infectious diseases such as the flu or malaria are still a severe threat to society. While some do not have specific geographic areas, others can spread and become epidemic or pandemics. While the first and foremost aspect of an epidemic is the loss of human life and will always remain, the outbreak can also have significant consequences for national or regional economies. The evidence reported in various studies suggests that the epidemic is affecting the country's economy through various aspects, including health, transportation, agriculture, and tourism. At the same time, markets and economic trade with other countries may also be affected, while the convergence of modern economies means that an epidemic can also encompass international supply chains. All these facts state that Coronavirus, as the first major pandemic in the last century, is one of the most critical issues to be studied. These facts, as well as the fast urbanization, increased international travel, and changing conditions are causing a global outbreak, not just a local phenomenon, imply that measures are needed for all countries to tackle this threat. In this paper, the impacts of the Coronavirus on the economic status and Energy demand (mainly oil and electricity) are being studied to determine the vulnerability of the economic and energy security in the time of severing epidemics or pandemicshttps://www.jemat.org/article_105823_763a42da6c38cd64adb4ffcbebfa4292.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Agriculture fertilizer-based media for cultivation of marine microalgae destined for biodiesel production495610527910.22109/jemt.2020.196949.1190ENNohmanJbariGreen Biotechnology laboratoryMAScIR (Moroccan Foundation for Advanced Science, Innovation & Research), Madinat Al Irfane, Rabat, Morocco.AdilElbaouchiICARDA (International Center for Agriculture Research in the Dry Area) Rabat MoroccoRedouaneBenhimaGreen Biotechnology laboratoryMAScIR (Moroccan Foundation for Advanced Science, Innovation & Research), Madinat Al Irfane, Rabat, Morocco.ImanBennisGreen Biotechnology laboratoryMAScIR (Moroccan Foundation for Advanced Science, Innovation & Research), Madinat Al Irfane, Rabat, Morocco.RachidBoulifCBS Programm. UM6P University Benguerir MoroccoYoussefZeroualAgBS programm UM6P university jorf lasfar MoroccoHichamEL ArroussiGreen Biotechnology laboratoryMAScIR (Moroccan Foundation for Advanced Science, Innovation & Research), Madinat Al Irfane, Rabat, Morocco.Journal Article20190808In recent years, biodiesel from microalgae has received large interest around the world, as sustainable energy for biofuel production. Mineral fertilizers can be a promising source for the development of low cost culture media. We investigate the influence of fertilizer-based media: MAP, TSP, Phosphoric acid and Ammonitrate on cell viability, nutrients uptake, biomass, lipids production and lipids profile of 3 microalgae strains. The best biomass production was 2.105 g L-1, 1.95g.L-1 and 1.75g.L-1 for D. tertiolecta, Isochrysis sp.and Tetraselmis sp cultured in TSP, MAP and H3PO4(54%)based-media respectively, compared to control medium (1.85, 1.76 and 1.71 g L-1 respectively). Lipid content of all strains in fertilizer-based media was similar to control. The lipid profile showed that FAMEs of all microalgae underwent a significant reduction in PUFAs for fertilizers based-media, which improves the quality of biodiesel. Mineral fertilizers are a promising source that can be a low-cost microalgae production base at the industrial level.https://www.jemat.org/article_105279_c6afa8ec5adb139f55d50550e0d9f03f.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Wind farm incorporation in reliability assessment of power systems from the viewpoint of reactive power management576710494110.22109/jemt.2020.203040.1199ENAliHeshmatiDepartment of Power Engineering, Faculty of Engineering, University of
Birjand, Birjand, IranHamid RezaNajafiFaculty of electrical and computer engineering, University of
Birjand, Birjand, IranJournal Article20191023The development and utilization of wind power to meet the electrical demand has recently received significant consideration. Additionally, one of the substantial roles of transmission system operators is to balance reactive power within a network in the sense that with the development of wind energy, wind turbines are expected to contribute towards reactive power generation. So far, there is not a wide range of attention being paid to reactive power in reliability evaluation including wind farms contribution. In this article, wind farms with several identical wind turbines are incorporated in reliability assessment while considering reactive power shortage. Fuzzy C-Means clustering method is used for the output power of wind turbines for analyzing power system reliability with wind farms integration. The application of this concept has been also utilized in developing multistep load levels in the illustrated load buses. Reactive power deficiency and the relevant voltage violations caused by the failure of reactive power generations are studied in this article. Load shedding and power injection techniques are employed to determine possible reactive power shortage required for alleviating network violations with and without wind power integration. Composite system reliability analysis in the existence of wind farms is implemented to assess indices affiliated with curtailed energy at various load points. The RBTS 6-bus system has been proportionally modified and studied to demonstrate the procedure. The results indicate the importance of wind power integration in improving both active and reactive reliability indices which in turn provide system planners with long-range planning for system development.https://www.jemat.org/article_104941_e1f7e57c011a510e5bea4f5f283a8501.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Assessment of risks and developing their handling options for hydraulic fracturing in Iranian oil and gas reservoirs687510689110.22109/jemt.2020.209222.1208ENMohammad AliHatefiPetroleum University of Technology (PUT)Seyed RezaShadizadehPetroleum University of Technology (PUT)MajidZendedel Siuki-Mohammad AliAhmadiIOR Research Institute (under the NIOC company)Journal Article20191127Hydraulic Fracturing (HF) is the most applicable technique for increasing productivity in reservoirs with medium to high permeability. Iranian oil and gas reservoirs with such permeability can benefit from this technology. Nowadays, this is not a very common technique in Iran. Because of various risks and related factors in Iran, the HF operation elements (e.g., designing, execution, evaluation, management and etc.) have not had considerable success and expansion. Correspondingly, an appropriate risk assessment and management can help the National Iranian Oil Company (NIOC) for developing this technology in their reservoirs. The aim of this work is to assess the HF risks and to determine an effective handling plan for this operation in Iran. The proposed methodology includes literature review, face-to-face interview with the respected experts, and evaluation of the gathered data. We hope the advised handling options are properly applied as a guideline for a successful HF in Iran.https://www.jemat.org/article_106891_8a044de5146cc0d2ec91b0ba6aa4bcfe.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Optimal multi-objective integration of photovoltaic, wind turbine, and battery energy storage in distribution networks768310689210.22109/jemt.2020.217725.1227ENMohammad RasolJannesarDepartment of Electrical engineering, Yazd University, Yazd, IranAlirezaSedighiDepartment of Electrical engineering, Yazd University, Yazd, IranMehdiSavaghebithe Electrical Engineering Section, The Mads Clausen Institute, University of Southern Denmark, Odense, DenmarkAmjadAnvari-MoghadamDepartment of Energy Technology, Aalborg University, Aalborg, DenmarkJosep M.GuerreroDepartment of Energy Technology, Aalborg University, Aalborg, DenmarkJournal Article20200129In recent years, grid integration of renewable energy sources (RES) and battery energy storage systems (BESS) has been rising rapidly. Many economic, technical, and environmental benefits can be gained with the integration of RES and BESS into the distribution network. Optimal decisions must be considered the trade-offs between two or more conflicting objectives, therefore, in this paper, these benefits are associated with a multi-objective function that consists of energy price arbitrage, transmission access fee, energy losses, power quality (voltage regulation), and environmental emissions. In this paper, it is assumed that the distribution system operator (DSO) has got the ownership of RES and BES. The placement, sizing, and operation of RES and BESS are optimized by the combination of a genetic multi-objective solver (GMOS) with linear programming. The simulation results using IEEE 33-bus distribution test system show that by using the proposed method, the net benefit is appropriate, energy losses are reduced, voltage magnitude is pushed within the limit, and environmental emissions are decreased.https://www.jemat.org/article_106892_954f041b61e9d5e11fb2cd26bc5a6ef4.pdfIran Energy Association (IEA)Journal of Energy Management and Technology2588-33724420201201Stochastic reliability evaluation of the stand-alone photovoltaic systems849310779610.22109/jemt.2020.212911.1218ENSinaGhaemiAzarbaijan Shahid Madani UniversitySeyyed MahdiMosavi BadjaniElectrical engineering faculty, Malek Ashtar UniversityJavadSalehiAzarbaijan Shahid Madani UniversityJournal Article20191224Move to the installation of the stand-alone photovoltaic (PV) systems for the remote and critical areas has been increased due to the technical advantages of them alongside the low investment cost. However, accurate reliability calculation of the stand-alone PV system is essential to verify its suitability for being a sustainable energy system. This paper proposes a new method for calculation of the stand-alone PV system's reliability without any assumption. In order to consider the uncertainty of the global solar irradiation on the output power of the system, stochastic modeling was hypothesized in this paper. Fast forward scenario reduction approach is used to reduce the number of the scenario so as to increase the execution time. Moreover, an effect of the ambient conditions such as temperature and humidity on the failure rate of the components, and the aging issue of the PV modules are taken into account to evaluate the reliability metrics precisely. The proposed reliability calculation has been implemented in the case study to assess its reliability metrics. The calculated results manifested that the optimal stand-alone PV system can be utilized as a reliable system; however, the ambient conditions would reduce its availability.https://www.jemat.org/article_107796_19e8f8739390eab55804b0463de5a663.pdf