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Aquaponics systems and technologies are growing primary industries in many countries, with high environmental and socio-economic advantages. Aquaponics is a closed-loop system that produces aquatic animals and plants in a new way using recirculated water and nutrients. With a growing world population expected to reach 9.7 billion by 2050, food production sustainability is a primary issue in today’s world agenda, and aquaponics and aquaculture systems can be potential contributors to the challenge. Observing the climate changes and global warming’s impact on the ecosystem, decreasing aqua animal stocks, and responding to increasing demand are turning points in the sustainability era. In the past 15 years, fish production has doubled, thus denoting that aquaponics transforms into commercial scales with a revolutionized production, high efficiency, and fewer resources’ utilization, thus requiring proper operation and management standards and practices. Therefore, this study aims to shape a new framework for sustainable aquaponics modeling and utilization as the all-in-one solution platform covering technical, managerial, socio-economic, institutional, and environmental measures within the suitability requirements. The proposed model in this study offers a systematic approach to the design and implementation of sustainability-efficient aquaponics and aquaculture systems. Through an exhaustive coverage of the topic, this research effort can be counted as a practical reference for researchers, scholars, experts, practitioners, and students in the context of aquaponics and aquaculture studies.
Mir Sayed Shah Danish; Tomonobu Senjyu; Najib Rahman Sabory; Mahdi Khosravy; Maria Luisa Grilli; Alexey Mikhaylov; Hemayatullah Majidi. A Forefront Framework for Sustainable Aquaponics Modeling and Design. Sustainability 2021, 13, 9313 .
AMA StyleMir Sayed Shah Danish, Tomonobu Senjyu, Najib Rahman Sabory, Mahdi Khosravy, Maria Luisa Grilli, Alexey Mikhaylov, Hemayatullah Majidi. A Forefront Framework for Sustainable Aquaponics Modeling and Design. Sustainability. 2021; 13 (16):9313.
Chicago/Turabian StyleMir Sayed Shah Danish; Tomonobu Senjyu; Najib Rahman Sabory; Mahdi Khosravy; Maria Luisa Grilli; Alexey Mikhaylov; Hemayatullah Majidi. 2021. "A Forefront Framework for Sustainable Aquaponics Modeling and Design." Sustainability 13, no. 16: 9313.
The consumer adoption of electric vehicles (EVs) has become most popular. Numerous studies are being carried out on the usage of EVs, the challenges of EVs, and their benefits. Based on these studies, factors such as battery charging time, charging infrastructure, battery cost, distance per charge, and the capital cost are considered factors in the adoption of electric vehicles and their interconnection with the grid. The large-scale development of electric vehicles has laid the path to Photovoltaic (PV) power for charging and grid support, as the PV panels can be placed at the top of the smart charging stations connected to a grid. By proper scheduling of PV and grid systems, the V2G connections can be made simple. For reliable operation of the grid, the ramifications associated with the PV interconnection must be properly addressed without any violations. To overcome the above issues, certain standards can be imposed on these systems. This paper mainly focuses on the various standards for EV, PV systems and their interconnection with grid-connected systems.
Suvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; Subashini Nallusamy; E. Randolph Collins; Tomonobu Senjyu. A Brief Survey on Important Interconnection Standards for Photovoltaic Systems and Electric Vehicles. World Electric Vehicle Journal 2021, 12, 117 .
AMA StyleSuvetha Poyyamani Sunddararaj, Shriram S. Rangarajan, Subashini Nallusamy, E. Randolph Collins, Tomonobu Senjyu. A Brief Survey on Important Interconnection Standards for Photovoltaic Systems and Electric Vehicles. World Electric Vehicle Journal. 2021; 12 (3):117.
Chicago/Turabian StyleSuvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; Subashini Nallusamy; E. Randolph Collins; Tomonobu Senjyu. 2021. "A Brief Survey on Important Interconnection Standards for Photovoltaic Systems and Electric Vehicles." World Electric Vehicle Journal 12, no. 3: 117.
Population growth and city expansion in developing countries require traditional urban planning practices to be transformed in order to tackle climate change and follow Sustainable Development Goals (SDGs) agendas. Almost every expert in the urban sector believes that future cities should be sustainable, smart, and environmentally friendly, where energy is one of the most critical factors to achieve these goals. They also agree that smart and sustainable energy provision for cities requires a comprehensive and responsive legal and policy framework to be in place at the national level. However, this research’s findings reveal a lack of such frameworks for this group of countries. Considering the challenges and unique nature of Low-Income-Developing (LID) countries, there should be a framework based on the realities in these countries. In this research, key challenges of urban and energy sectors of LID countries, specifically Afghanistan, are identified, and a framework for the integration of sustainable and smart energy in the urban planning processes for LID countries is proposed. To make it easily replicable and adaptable for LID countries, the proposed framework is studied and analyzed around Afghanistan’s urban and energy sectors. This is one of the few frameworks of its kind for LID economies to the best of the authors’ knowledge. This framework lays a solid foundation for sustainable and smart energy integration in the urban planning process of developing countries. This study highlights that sustainable and smart energy systems could ensure climate change mitigation and economic growth enhancement but require close cross-sectoral coordination and policy maker’s commitments and involvement. This research will help many existing and emerging cities in the LID countries’ worldwide use and benefit from the proposed framework in their urban planning processes. It also enables policymakers, urban planners and designers, municipalities leadership, and other stakeholders of the urban, energy, and environment sectors to work together and make smart and rational decisions for the future of their cities and lead them towards smart and sustainable cities.
Najib Sabory; Tomonobu Senjyu; Mir Danish; Mikaeel Ahmadi; Hameedullah Zaheb; Mustafa Halim. A Framework for Integration of Smart and Sustainable Energy Systems in Urban Planning Processes of Low-Income Developing Countries: Afghanistan Case. Sustainability 2021, 13, 8428 .
AMA StyleNajib Sabory, Tomonobu Senjyu, Mir Danish, Mikaeel Ahmadi, Hameedullah Zaheb, Mustafa Halim. A Framework for Integration of Smart and Sustainable Energy Systems in Urban Planning Processes of Low-Income Developing Countries: Afghanistan Case. Sustainability. 2021; 13 (15):8428.
Chicago/Turabian StyleNajib Sabory; Tomonobu Senjyu; Mir Danish; Mikaeel Ahmadi; Hameedullah Zaheb; Mustafa Halim. 2021. "A Framework for Integration of Smart and Sustainable Energy Systems in Urban Planning Processes of Low-Income Developing Countries: Afghanistan Case." Sustainability 13, no. 15: 8428.
Buildings are one of the major consumers of energy and producers of greenhouse gases globally. Reducing energy consumption and greenhouse gas emissions from buildings helps decrease global warming and enhances the natural environment. This can only happen by transitioning from traditional to sustainable architecture and urban planning. For decades, sustainable architecture and urban planning have been applied in many countries’ building sectors, but others among the poor and least developed countries are left behind. Kabul, the capital of one of the least developed countries, Afghanistan, has experienced a remarkable growth rate in population and building since 2001. This rapid and uncontrolled growth of building construction caused problems from different perspectives, especially from the sustainability perspective. In this paper, the current state of the building industry in Kabul is evaluated from a sustainability perspective, especially those constructed after the year 2000. This assessment helps to rate and see how sustainable each type of building is. Analysis of the collected data clarifies that buildings’ sustainability level in Kabul city is significantly low. Based on the results, recommendations provide a better future for the building industry and ensure that existing and future buildings are sufficiently sustainable to protect the environment of Kabul city and of the globe.
Najib Sabory; Tomonobu Senjyu; Mir Danish; Sayed Maqbool Sayed; Arash Ahmadi; Edris Saeedi. Post-2000 Building Industry in Kabul City from Sustainability Perspective. Sustainability 2021, 13, 7833 .
AMA StyleNajib Sabory, Tomonobu Senjyu, Mir Danish, Sayed Maqbool Sayed, Arash Ahmadi, Edris Saeedi. Post-2000 Building Industry in Kabul City from Sustainability Perspective. Sustainability. 2021; 13 (14):7833.
Chicago/Turabian StyleNajib Sabory; Tomonobu Senjyu; Mir Danish; Sayed Maqbool Sayed; Arash Ahmadi; Edris Saeedi. 2021. "Post-2000 Building Industry in Kabul City from Sustainability Perspective." Sustainability 13, no. 14: 7833.
Grid interactive solar photovoltaic (PV) and electric vehicle (EV) systems are the emerging technologies nowadays, mainly due to energy cost reduction and minimization of emission levels. Various research surveys have presented the effect of grid integration of PVs and EVs in an isolated way. However, it is worth accepting that with the continuous emergence of PVs and EVs, the power grid is experiencing the combined effect of PV–EV integration. The distribution system network of EVs impacts the power quality of the grid. In this paper, shunt active power filter is modelled using neuro-fuzzy control technique for the mitigation of harmonics using MATLAB. The improvement in the system performance is analyzed and compared with the traditional compensation techniques.
Mujahid Irfan; Shriram S. Rangarajan; E. Collins; Tomonobu Senjyu. Enhancing the Power Quality of the Grid Interactive Solar Photovoltaic-Electric Vehicle System. World Electric Vehicle Journal 2021, 12, 98 .
AMA StyleMujahid Irfan, Shriram S. Rangarajan, E. Collins, Tomonobu Senjyu. Enhancing the Power Quality of the Grid Interactive Solar Photovoltaic-Electric Vehicle System. World Electric Vehicle Journal. 2021; 12 (3):98.
Chicago/Turabian StyleMujahid Irfan; Shriram S. Rangarajan; E. Collins; Tomonobu Senjyu. 2021. "Enhancing the Power Quality of the Grid Interactive Solar Photovoltaic-Electric Vehicle System." World Electric Vehicle Journal 12, no. 3: 98.
By providing a reliable and economical supply of energy, microgrids (MGs) may play a pivotal role in the case of large grid disruptions. However, the resilience benefits of microgrids in terms of outage survivability that often leads to economic paybacks are not well investigated in the existing literature. To address this concern, this paper optimizes and simulates a grid-connected MG placed at a hospital in the USA, consisting of a photovoltaic (PV) module and an energy storage unit that can adequately prevent a prolonged blackout. The impact of net energy metering (NEM) and diesel generator (DG) has further been examined for this hybrid system. Four different cases have been optimized and results show that the PV and battery work in tandem, both with and without considering the existing DG and NEM and meets all critical load demand during a grid outage. The findings also indicate that the proposed approach yields significant economic benefits for two cases relative to business as usual case
Hasan Masrur; Tomonobu Senjyu; Rabiul Islam; Abbas Z. Kouzani; M A Parvez Mahmud. Resilience-oriented Dispatch of Microgrids Considering Grid Interruptions. IEEE Transactions on Applied Superconductivity 2021, PP, 1 -1.
AMA StyleHasan Masrur, Tomonobu Senjyu, Rabiul Islam, Abbas Z. Kouzani, M A Parvez Mahmud. Resilience-oriented Dispatch of Microgrids Considering Grid Interruptions. IEEE Transactions on Applied Superconductivity. 2021; PP (99):1-1.
Chicago/Turabian StyleHasan Masrur; Tomonobu Senjyu; Rabiul Islam; Abbas Z. Kouzani; M A Parvez Mahmud. 2021. "Resilience-oriented Dispatch of Microgrids Considering Grid Interruptions." IEEE Transactions on Applied Superconductivity PP, no. 99: 1-1.
Urbanization and technology have proven to be detrimental to the environment. Buildings contribute a significant portion of this damage. This issue motivated governments, builders, engineers, and architects to seek ways to reduce buildings’ environmental footprints. Leadership in Energy and Environmental Design (LEED), developed by the U.S. Green Building Council (USGBC), is one of the most widely used strategies to ensure energy efficiency and a clean environment in buildings. In Afghanistan, where there are no active regulatory frameworks for energy saving and efficiency for the building sector, it is imperative to promote the transformation of the building industry and practices towards sustainability. In this regard, the role of the residential building sector is of utmost importance due to its major share in the country’s energy consumption and GHG emissions profile. Thus, this study assesses the energy efficiency and environmental impact of existing buildings in Kabul city concerning the LEED rating system. This research suggests practical steps to improve the sustainability of the residential building stock in Kabul city. Robust sets of data on existing residential buildings in Kabul are collected, classified, evaluated, and compared to LEED standards. This research reveals and concludes that most of the existing buildings in Kabul city are in poor conditions and do not meet the minimum requirements to be a candidate for LEED certification. A detailed analysis of the results has led to recommendations on how these buildings could improve to meet the LEED criteria. This is the first study of its kind conducted for Kabul city residential building. Considering the cross-sectoral nature of the building industry, the findings of this study will contribute to many other areas such as water, transportation, ICT, health, energy and the environment.
Najib Sabory; Tomonobo Senjyu; Adina Momand; Hadya Waqfi; Nilofar Saboor; Rabia Mobarez; Farida Razeqi. LEED Scores of Residential Buildings in Poor Cities: Kabul City Case. Sustainability 2021, 13, 6959 .
AMA StyleNajib Sabory, Tomonobo Senjyu, Adina Momand, Hadya Waqfi, Nilofar Saboor, Rabia Mobarez, Farida Razeqi. LEED Scores of Residential Buildings in Poor Cities: Kabul City Case. Sustainability. 2021; 13 (12):6959.
Chicago/Turabian StyleNajib Sabory; Tomonobo Senjyu; Adina Momand; Hadya Waqfi; Nilofar Saboor; Rabia Mobarez; Farida Razeqi. 2021. "LEED Scores of Residential Buildings in Poor Cities: Kabul City Case." Sustainability 13, no. 12: 6959.
Electric vehicle charging station have become an urgent need in many communities around the world, due to the increase of using electric vehicles over conventional vehicles. In addition, establishment of charging stations, and the grid impact of household photovoltaic power generation would reduce the feed-in tariff. These two factors are considered to propose setting up charging stations at convenience stores, which would enable the electric energy to be shared between locations. Charging stations could collect excess photovoltaic energy from homes and market it to electric vehicles. This article examines vehicle travel time, basic household energy demand, and the electricity consumption status of Okinawa city as a whole to model the operation of an electric vehicle charging station for a year. The entire program is optimized using MATLAB mixed integer linear programming (MILP) toolbox. The findings demonstrate that a profit could be achieved under the principle of ensuring the charging station’s stable service. Household photovoltaic power generation and electric vehicles are highly dependent on energy sharing between regions. The convenience store charging station service strategy suggested gives a solution to the future issues.
Yongyi Huang; Atsushi Yona; Hiroshi Takahashi; Ashraf Hemeida; Paras Mandal; Alexey Mikhaylov; Tomonobu Senjyu; Mohammed Lotfy. Energy Management System Optimization of Drug Store Electric Vehicles Charging Station Operation. Sustainability 2021, 13, 6163 .
AMA StyleYongyi Huang, Atsushi Yona, Hiroshi Takahashi, Ashraf Hemeida, Paras Mandal, Alexey Mikhaylov, Tomonobu Senjyu, Mohammed Lotfy. Energy Management System Optimization of Drug Store Electric Vehicles Charging Station Operation. Sustainability. 2021; 13 (11):6163.
Chicago/Turabian StyleYongyi Huang; Atsushi Yona; Hiroshi Takahashi; Ashraf Hemeida; Paras Mandal; Alexey Mikhaylov; Tomonobu Senjyu; Mohammed Lotfy. 2021. "Energy Management System Optimization of Drug Store Electric Vehicles Charging Station Operation." Sustainability 13, no. 11: 6163.
This article proposes a plan to replace real-time power with constant power from the grid to reduce costs and reduce the impact of the micro-grid on the main grid at the same time. Most of the peak electricity consumption periods of universities or some enterprise institutions are during the daytime. If solar energy can be used reasonably at this time, it can provide a good guarantee of peak power. In this study, a grid-linked solar-plus-storage micro-grid was used to supply power to a university located in Okinawa, Japan. The non-dominated sorting genetic algorithm II (NSGA-II) was used to optimize the model size, and the loss of power supply probability (LPSP), life cycle cost (LCC), and waste of energy (WE) were taken as the optimization indicators. For this study, three scenarios were considered where the first scheme (Case 1) was a comparison scheme, which used a PV battery and real-time power from the infinity bus. Both the second and third cases used constant power. While Case 2 used constant power throughout the year, Case 3 used daily constant power. The optimal solutions for the power supply units were grouped into three cases where Case 1 was found to be the most expensive one. It was found that the costs of Cases 2 and 3 were 62.8% and 63.3% less than Case 1. As a result, the waste of energy was found to be more significant than Case 1: 70 times and 60 times, respectively. On the contrary, Case 1 had 15.2% and 16.7% less carbon emissions than Case 2 and Case 3, respectively. This article put forward the idea of constant power supply growth at the financial markets, which breaks the traditional way in which the power supply side follows the user’s consumption. While reducing costs, it reduces the impact on large-scale power grids and can also ensure the reliability of campus microgrids.
Yongyi Huang; Hasan Masrur; Ryuto Shigenobu; Ashraf Hemeida; Alexey Mikhaylov; Tomonobu Senjyu. A Comparative Design of a Campus Microgrid Considering a Multi-Scenario and Multi-Objective Approach. Energies 2021, 14, 2853 .
AMA StyleYongyi Huang, Hasan Masrur, Ryuto Shigenobu, Ashraf Hemeida, Alexey Mikhaylov, Tomonobu Senjyu. A Comparative Design of a Campus Microgrid Considering a Multi-Scenario and Multi-Objective Approach. Energies. 2021; 14 (11):2853.
Chicago/Turabian StyleYongyi Huang; Hasan Masrur; Ryuto Shigenobu; Ashraf Hemeida; Alexey Mikhaylov; Tomonobu Senjyu. 2021. "A Comparative Design of a Campus Microgrid Considering a Multi-Scenario and Multi-Objective Approach." Energies 14, no. 11: 2853.
Penetration of equipment such as photovoltaic power generations (PV), heat pump water heaters (HP), and electric vehicles (EV) introduces voltage unbalance issues in distribution systems. Controlling PV and energy storage system (ESS) outputs or coordinated EV charging are investigated for voltage unbalance compensation. However, some issues exist, such as dependency on installed capacity and fairness among consumers. Therefore, the ideal way to mitigate unbalanced voltages is to use grid-side equipment mainly. This paper proposes a voltage unbalance compensation based on optimal tap operation scheduling of three-phase individual controlled step voltage regulators (3ϕSVR) and load ratio control transformer (LRT). In the formulation of the optimization problem, multiple voltage unbalance metrics are comprehensively included. In addition, voltage deviations, network losses, and coordinated tap operations, which are typical issues in distribution systems, are considered. In order to investigate the mutual influence among voltage unbalance and other typical issues, various optimization problems are formulated, and then they are compared by numerical simulations. The results show that the proper operation of 3ϕSVRs and LRT effectively mitigates voltage unbalance. Furthermore, the results also show that voltage unbalances and other typical issues can be improved simultaneously with appropriate formulations.
Akito Nakadomari; Ryuto Shigenobu; Takeyoshi Kato; Narayanan Krishnan; Ashraf Hemeida; Hiroshi Takahashi; Tomonobu Senjyu. Unbalanced Voltage Compensation with Optimal Voltage Controlled Regulators and Load Ratio Control Transformer. Energies 2021, 14, 2997 .
AMA StyleAkito Nakadomari, Ryuto Shigenobu, Takeyoshi Kato, Narayanan Krishnan, Ashraf Hemeida, Hiroshi Takahashi, Tomonobu Senjyu. Unbalanced Voltage Compensation with Optimal Voltage Controlled Regulators and Load Ratio Control Transformer. Energies. 2021; 14 (11):2997.
Chicago/Turabian StyleAkito Nakadomari; Ryuto Shigenobu; Takeyoshi Kato; Narayanan Krishnan; Ashraf Hemeida; Hiroshi Takahashi; Tomonobu Senjyu. 2021. "Unbalanced Voltage Compensation with Optimal Voltage Controlled Regulators and Load Ratio Control Transformer." Energies 14, no. 11: 2997.
The need for inexpensive and sustainable electricity has become an exciting adventure due to the recent rise in the local population and the number of visitors visiting the Banana Islands. Banana Islands is a grid-isolated environment with abundant renewable energy, establishing a hybrid renewable energy-based power system may be a viable solution to the high cost of diesel fuel. This paper describes a dual-flow optimization method for electrifying the Banana Islands, a remote island in Sierra Leone. The study weighs the pros and cons of maintaining the current diesel-based power setup versus introducing a hybrid renewable energy system that takes backup component analysis into account. Hybrid Optimization of Multiple Energy Resources (HOMER) software is used in the first optimization to optimally design the various system configurations based on techno-economic and environmental characteristics. A Multi-Attribute Decision-Making (MADM) Model that takes into account in the second optimization, the Combinative Distance-based Assessment System (CODAS) algorithm, and various methods of assigning weights to the attributes is used to rank the best configuration. The results show that the hybrid renewable energy system is a better option for electrifying the Banana Islands than the current stand-alone system. The Analytical Hierarchy Process (AHP) method of weight assignment was found to be superior to the Entropy method. Biogas generator-assisted hybrid configurations outperformed diesel generator-assisted hybrid configurations. With an optimum design of 101 kW PV, 1 wind turbine, 50 kW biogas, 86 batteries, and a 37.8 kW converter, the PV-wind-biogas-battery system is rated as the best configuration. It has a net present cost (NPC) of $487,247, a cost of energy (COE) of $0.211/kWh, and CO2 emission of 17.5 kg/year. Sensitivity analyses reveal that changes in the rate of inflation and the cost of storage have a significant effect on the overall cost of the configuration.
Keifa Konneh; Hasan Masrur; Mohammad Othman; Hiroshi Takahashi; Narayanan Krishna; Tomonobu Senjyu. Multi-Attribute Decision-Making Approach for a Cost-Effective and Sustainable Energy System Considering Weight Assignment Analysis. Sustainability 2021, 13, 5615 .
AMA StyleKeifa Konneh, Hasan Masrur, Mohammad Othman, Hiroshi Takahashi, Narayanan Krishna, Tomonobu Senjyu. Multi-Attribute Decision-Making Approach for a Cost-Effective and Sustainable Energy System Considering Weight Assignment Analysis. Sustainability. 2021; 13 (10):5615.
Chicago/Turabian StyleKeifa Konneh; Hasan Masrur; Mohammad Othman; Hiroshi Takahashi; Narayanan Krishna; Tomonobu Senjyu. 2021. "Multi-Attribute Decision-Making Approach for a Cost-Effective and Sustainable Energy System Considering Weight Assignment Analysis." Sustainability 13, no. 10: 5615.
This paper proposes a new and surge-less solid-state direct current (DC) circuit breaker in a high-voltage direct current (HVDC) transmission system to clear the short-circuit fault. The main purpose is the fast interruption and surge-voltage and over-current suppression capability analysis of the breaker during the fault. The breaker is equipped with series insulated-gate bipolar transistor (IGBT) switches to mitigate the stress of high voltage on the switches. Instead of conventional metal oxide varistor (MOV), the resistance–capacitance freewheeling diodes branch is used to bypass the high fault current and repress the over-voltage across the circuit breaker. The topology and different operation modes of the proposed breaker are discussed. In addition, to verify the effectiveness of the proposed circuit breaker, it is compared with two other types of surge-less solid-state DC circuit breakers in terms of surge-voltage and over-current suppression. For this purpose, MATLAB Simulink simulation software is used. The system is designed for the transmission of 20 MW power over a 120 km distance where the voltage of the transmission line is 220 kV. The results show that the fault current is interrupted in a very short time and the surge-voltage and over-current across the proposed breaker are considerably reduced compared to other topologies.
Gul Ludin; Mohammad Amin; Hidehito Matayoshi; Shriram Rangarajan; Ashraf Hemeida; Hiroshi Takahashi; Tomonobu Senjyu. Solid-State DC Circuit Breakers and Their Comparison in Modular Multilevel Converter Based-HVDC Transmission System. Electronics 2021, 10, 1204 .
AMA StyleGul Ludin, Mohammad Amin, Hidehito Matayoshi, Shriram Rangarajan, Ashraf Hemeida, Hiroshi Takahashi, Tomonobu Senjyu. Solid-State DC Circuit Breakers and Their Comparison in Modular Multilevel Converter Based-HVDC Transmission System. Electronics. 2021; 10 (10):1204.
Chicago/Turabian StyleGul Ludin; Mohammad Amin; Hidehito Matayoshi; Shriram Rangarajan; Ashraf Hemeida; Hiroshi Takahashi; Tomonobu Senjyu. 2021. "Solid-State DC Circuit Breakers and Their Comparison in Modular Multilevel Converter Based-HVDC Transmission System." Electronics 10, no. 10: 1204.
The concept of introducing hybrid off-grid systems has made electricity accessible to areas that are far or have no access to grid network. This paper evaluates the techno-economic and environmental characteristics of a hybrid renewable energy system considering three different scheduling approaches, four different solar tracking systems, two different PV modules and eight scheduling scenarios to supply sustainable electricity to a rural community in Sierra Leone. Each scenario consists of a solar tracking system, a specific type of PV module and a scheduling approach. The aim is to find the most efficient and cost-effective scenario that meets the electrical demands of the village. Results revealed that the ‘Two axis tracking system’ generated the highest PV power, 28.8% additional power compared to the ‘No tracking system’ confirming the superiority of using a tracking system though it comes with initial cost repercussions. Also, systems that employed the use of Canadiasolar Dymond CS6K-285M-FG PV module tend to be more efficient and cost-effective than those that employed Sharp ND-250QCS PV module even with the same solar tracking technology and scheduling approach. From the best scheduling approach (third scheduling), Scenario 7 (SC#7) gives the lowest net present cost (NPC) of $ \$ $ 1.53M with $ \$ $ 0.173/kWh cost of energy (COE) and CO 2 emission of 8.54 kg/yr making it the optimum scenario. A daily operation of the optimum scenario on both a sunny and rainy day confirms that the system is capable of supplying the required electricity for both rainy and dry seasons. Sensitivity analyses explain the high reliance of the system cost on the erratic inflation rate, discount rate and PV derating factor. Maintaining a healthy and sustainable environment depends on the minimum load ratio of both the biogas and diesel generators.
Keifa Vamba Konneh; Hasan Masrur; Mohammad Lutfi Othman; Noor Izzri Abdul Wahab; Hashim Hizam; Syed Zahurul Islam; Peter Crossley; Tomonobu Senjyu. Optimal Design and Performance Analysis of a Hybrid Off-Grid Renewable Power System Considering Different Component Scheduling, PV Modules, and Solar Tracking Systems. IEEE Access 2021, 9, 64393 -64413.
AMA StyleKeifa Vamba Konneh, Hasan Masrur, Mohammad Lutfi Othman, Noor Izzri Abdul Wahab, Hashim Hizam, Syed Zahurul Islam, Peter Crossley, Tomonobu Senjyu. Optimal Design and Performance Analysis of a Hybrid Off-Grid Renewable Power System Considering Different Component Scheduling, PV Modules, and Solar Tracking Systems. IEEE Access. 2021; 9 ():64393-64413.
Chicago/Turabian StyleKeifa Vamba Konneh; Hasan Masrur; Mohammad Lutfi Othman; Noor Izzri Abdul Wahab; Hashim Hizam; Syed Zahurul Islam; Peter Crossley; Tomonobu Senjyu. 2021. "Optimal Design and Performance Analysis of a Hybrid Off-Grid Renewable Power System Considering Different Component Scheduling, PV Modules, and Solar Tracking Systems." IEEE Access 9, no. : 64393-64413.
A Stable and highly reliable DC link voltage represents an important factor for efficient power transfer in high voltage direct current (HVDC) networks. In this framework, this paper investigates the control and stability analysis of voltage source converter (VSC) for DC link voltage regulation. To separately achieve the independent active and reactive power control, the system voltages and currents are represented in the synchronous reference frame. In order to optimally design the parameters of proportional-integral (PI) controller, the inner and outer loops’ transfer functions are thoroughly derived/developed. In addition,/moreover, in order to attain satisfactory/certain system performance, modulus optimum, symmetrical optimum pole placement control approaches are studied and implemented for the purpose of tuning the voltage/current controller gain parameters. In particular for the symmetrical optimum control method, the gain parameters of the DC-bus voltage are determined under different values of network impedance. Furthermore, the impact/influence of changing gain parameters on the DC-link voltage and poles/zeros movement are investigated. MATLAB/Simulink model is built and simulation studies are carried out to verify the introduced concepts.
Dalia Rabie; Tomonobu Senjyu; Salem Alkhalaf; Yahia S. Mohamed; E.G. Shehata. Study and analysis of voltage source converter control stability for HVDC system using different control techniques. Ain Shams Engineering Journal 2021, 1 .
AMA StyleDalia Rabie, Tomonobu Senjyu, Salem Alkhalaf, Yahia S. Mohamed, E.G. Shehata. Study and analysis of voltage source converter control stability for HVDC system using different control techniques. Ain Shams Engineering Journal. 2021; ():1.
Chicago/Turabian StyleDalia Rabie; Tomonobu Senjyu; Salem Alkhalaf; Yahia S. Mohamed; E.G. Shehata. 2021. "Study and analysis of voltage source converter control stability for HVDC system using different control techniques." Ain Shams Engineering Journal , no. : 1.
Stochastic nature of load demand has a great impact on the performance of electrical power system. As a result, planning of electrical power system considering load uncertainties became inevitable. This paper presents Monte Carlo simulation based different bio-inspired algorithms, grey wolf optimization (GWO), manta ray foraging optimization (MRFO), satin bower bird optimization (SBO) and whale optimization (WOA) to optimize locations of three DG units under load uncertainties considering 500 scenarios. Each scenario includes 50 iterations which means that for each run we have 25,000 iterations and 500 characteristics for different load value. Two objectives are achieved. Firstly, statistically finding the optimal probabilistic location of three DG units under load uncertainties in IEEE 33-bus and IEEE 69-bus radial distribution system based on Monte Carlo simulation integrated with different bio-inspired algorithms. Secondly, comparing between the performances of four different bio-inspired algorithms. Three objective functions are considered, minimizing active power loss, minimizing voltage deviation and maximizing voltage stability index. The active and reactive power demand are normally distributed using normal distribution function. The optimal probabilistic location is investigated considering two cases under load uncertainties, optimizing location of three DG units generally and optimizing location of one DG unit assuming two optimum locations for the other two units extracted from case I. The obtained results (after placing DG units) are compared to the base case (DG units are not connected) and compared to each other according to the optimization technique. The results show that, SBO algorithm superiors other algorithms almost in all cases. Comes next GWO which provide good results generally. However, the good performance obtained by MRFO, it consumes twice the time of other algorithms. WOA however fast convergence, it provides results worse than other algorithms. The system is applied to the well-known IEEE 33-bus and IEEE 69-bus radial distribution system.
Mahmoud G Hemeida; Salem Alkhalaf; Tomonobu Senjyu; Abdalla Ibrahim; Mahrous Ahmed; Ayman M. Bahaa-Eldin. Optimal probabilistic location of DGs using Monte Carlo simulation based different bio-inspired algorithms. Ain Shams Engineering Journal 2021, 1 .
AMA StyleMahmoud G Hemeida, Salem Alkhalaf, Tomonobu Senjyu, Abdalla Ibrahim, Mahrous Ahmed, Ayman M. Bahaa-Eldin. Optimal probabilistic location of DGs using Monte Carlo simulation based different bio-inspired algorithms. Ain Shams Engineering Journal. 2021; ():1.
Chicago/Turabian StyleMahmoud G Hemeida; Salem Alkhalaf; Tomonobu Senjyu; Abdalla Ibrahim; Mahrous Ahmed; Ayman M. Bahaa-Eldin. 2021. "Optimal probabilistic location of DGs using Monte Carlo simulation based different bio-inspired algorithms." Ain Shams Engineering Journal , no. : 1.
This study was conducted to evaluate the implementation of an open innovation cryptocurrency financial system using a statistical approach. The data array reflects the actual speed of the cryptocurrency system, expressed in transactions per second (TPS), taken as the average annual speed. The article offers a comprehensive approach for choosing the optimal cryptocurrency financial system. The final analysis shows that the reasons for the adoption of the cryptocurrency financial system are practicality and convenience, as well as efficient transaction time, faster payment, and simplicity of the payment process. The impact of social factors, expected efforts, and conditions of assistance on the attitude to the cryptocurrency financial system were evaluated. In addition, social factors that have a significant impact on the implementation of the cryptocurrency financial system were identified.
Valery Titov; Mafura Uandykova; Oleg Litvishko; Tatyana Kalmykova; Sergey Prosekov; Tomonobu Senjyu. Cryptocurrency Open Innovation Payment System: Comparative Analysis of Existing Cryptocurrencies. Journal of Open Innovation: Technology, Market, and Complexity 2021, 7, 102 .
AMA StyleValery Titov, Mafura Uandykova, Oleg Litvishko, Tatyana Kalmykova, Sergey Prosekov, Tomonobu Senjyu. Cryptocurrency Open Innovation Payment System: Comparative Analysis of Existing Cryptocurrencies. Journal of Open Innovation: Technology, Market, and Complexity. 2021; 7 (1):102.
Chicago/Turabian StyleValery Titov; Mafura Uandykova; Oleg Litvishko; Tatyana Kalmykova; Sergey Prosekov; Tomonobu Senjyu. 2021. "Cryptocurrency Open Innovation Payment System: Comparative Analysis of Existing Cryptocurrencies." Journal of Open Innovation: Technology, Market, and Complexity 7, no. 1: 102.
Photovoltaic (PV) systems encounter substantial losses throughout their lifespan due to the different derating factors of PV modules. Those factors mainly vary according to the geographical location and PV panel characteristics. However, the available literature does not explicitly concentrate on the technical and economic impact of the derating factors within the PV system. Owing to that necessity, this study performs a comprehensive analysis of various PV loss parameters followed by a techno-economic assessment of derating factors using the average value on a grid-connected and optimally tilted PV system located in Hatiya, Bangladesh. Some criteria linked to the derating factors such as PV degradation and ambient temperature are further explored to analyze their impact on the aforementioned power system. Simulation results show that PV power generation would vary around 12% annually, subject to a 10% variation in the derating factor. Again, a 10% difference in the derating factor changes the net present cost (NPC) by around 3% to 4%. The system provides the best technical performance concerning annual PV production, power trade with the grid, and the renewable fraction at a higher value of the derating factor since it represents a lower impact of the loss parameters. Similarly, the financial performance in terms of the NPC, levelized cost of energy (LCOE), and grid power exchange cost is found to be lower when the derating factor value is higher.
Hasan Masrur; Keifa Konneh; Mikaeel Ahmadi; Kaisar Khan; Mohammad Othman; Tomonobu Senjyu. Assessing the Techno-Economic Impact of Derating Factors on Optimally Tilted Grid-Tied Photovoltaic Systems. Energies 2021, 14, 1044 .
AMA StyleHasan Masrur, Keifa Konneh, Mikaeel Ahmadi, Kaisar Khan, Mohammad Othman, Tomonobu Senjyu. Assessing the Techno-Economic Impact of Derating Factors on Optimally Tilted Grid-Tied Photovoltaic Systems. Energies. 2021; 14 (4):1044.
Chicago/Turabian StyleHasan Masrur; Keifa Konneh; Mikaeel Ahmadi; Kaisar Khan; Mohammad Othman; Tomonobu Senjyu. 2021. "Assessing the Techno-Economic Impact of Derating Factors on Optimally Tilted Grid-Tied Photovoltaic Systems." Energies 14, no. 4: 1044.
The invention of multilevel converters has set forth many advantages in power electronics field. The design of those converters with reduced losses and high efficient topologies attracts many researchers who work in the field of power electronics. In this work, a novel configuration of T-Type multilevel inverter for grid-connected systems is proposed. It is the combination of an H-bridge configuration along with an asymmetrical circuit made up of bidirectional switches. Both the configurations operate at different switching frequencies which lead to a hybrid switching technique. The T-Type MLI is designed in such a way to produce an output of 3 level& 5 levels, and the comparison on THD levels is made. The overall performance of the newly designed inverter is analyzed with the help of simulation. The simulation of the newly designed topology is done using MATLAB and the results are obtained.
Suvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; N. Subashini; Umashankar Subramaniam; E. Randolph Collins; Tomonobu Senjyu. A novel T-Type Multilevel Inverter for Electric Vehicle and Grid-connected applications. 2021 7th International Conference on Electrical Energy Systems (ICEES) 2021, 166 -170.
AMA StyleSuvetha Poyyamani Sunddararaj, Shriram S. Rangarajan, N. Subashini, Umashankar Subramaniam, E. Randolph Collins, Tomonobu Senjyu. A novel T-Type Multilevel Inverter for Electric Vehicle and Grid-connected applications. 2021 7th International Conference on Electrical Energy Systems (ICEES). 2021; ():166-170.
Chicago/Turabian StyleSuvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; N. Subashini; Umashankar Subramaniam; E. Randolph Collins; Tomonobu Senjyu. 2021. "A novel T-Type Multilevel Inverter for Electric Vehicle and Grid-connected applications." 2021 7th International Conference on Electrical Energy Systems (ICEES) , no. : 166-170.
This article discusses the circuit design and the performance of a coupled inductor bidirectional DC-DC converter. The proposed design is used to increase the voltage of the converter at the output end by reducing the switching voltage stress. This is achieved by the series connection of two switch bridges. Here, the coupled inductor operates as the filter inductor for non-isolated part of the converter and as a transformer for the isolated converter topology. The operation and features of the proposedbidirectional chopper circuit is discussed in detail. The control of the given system is done using Proportional-Integral-Controller and the performance is also compared with few other controllers through simulation in MATLAB/Simulink environment. The proposed converter design is useful for EV applications in smart grid.
Suvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; Umashankar Subramaniam; E. Randolp Collins; Tomonobu Senjyu. Performance of P/PI/PID Based controller in DC-DC Converter for PV applications and Smart Grid Technology. 2021 7th International Conference on Electrical Energy Systems (ICEES) 2021, 171 -176.
AMA StyleSuvetha Poyyamani Sunddararaj, Shriram S. Rangarajan, Umashankar Subramaniam, E. Randolp Collins, Tomonobu Senjyu. Performance of P/PI/PID Based controller in DC-DC Converter for PV applications and Smart Grid Technology. 2021 7th International Conference on Electrical Energy Systems (ICEES). 2021; ():171-176.
Chicago/Turabian StyleSuvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; Umashankar Subramaniam; E. Randolp Collins; Tomonobu Senjyu. 2021. "Performance of P/PI/PID Based controller in DC-DC Converter for PV applications and Smart Grid Technology." 2021 7th International Conference on Electrical Energy Systems (ICEES) , no. : 171-176.
As the growth of battery powered electric vehicles is increasing, a high boost in the DC voltage is essential before interfacing the high gain converter to the grid through an inverter. Apart from this, the role choppers in PV systems and energy storage purposes also serves good. The input current among inductors can be shared by paralleling the converters, making the power electronic systems to be highly reliable and efficient. This paper discusses the circuit model and performance of a bidirectional chopper with coupled inductor for electric vehicle applications. The coupled inductor operates as the filter inductor for non-isolated part of the converter and as a transformer for the isolated converter topology. The reduction of switching voltage stress across the power semiconductor devices is achieved by series connection of two switch bridges. This converter is further tested with a nine level inverter. The bidirectional converter designed for electric vehicles is further interfaced with a multilevel inverter (nine level). The implementation of the converter design is simulated using MATLAB/SIMULINK
Suvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; Umashankar Subramaniam; E. Randolph Collins; Tomonobu Senjyu. A new topology of DC-DC Converter with Bidirectional Power Flow Capability Coupled with a Nine Multilevel Inverter for EV Applications. 2021 7th International Conference on Electrical Energy Systems (ICEES) 2021, 177 -182.
AMA StyleSuvetha Poyyamani Sunddararaj, Shriram S. Rangarajan, Umashankar Subramaniam, E. Randolph Collins, Tomonobu Senjyu. A new topology of DC-DC Converter with Bidirectional Power Flow Capability Coupled with a Nine Multilevel Inverter for EV Applications. 2021 7th International Conference on Electrical Energy Systems (ICEES). 2021; ():177-182.
Chicago/Turabian StyleSuvetha Poyyamani Sunddararaj; Shriram S. Rangarajan; Umashankar Subramaniam; E. Randolph Collins; Tomonobu Senjyu. 2021. "A new topology of DC-DC Converter with Bidirectional Power Flow Capability Coupled with a Nine Multilevel Inverter for EV Applications." 2021 7th International Conference on Electrical Energy Systems (ICEES) , no. : 177-182.