The Experts below are selected from a list of 8760 Experts worldwide ranked by ideXlab platform
Sathans Suhag - One of the best experts on this subject based on the ideXlab platform.
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grid independent pv system hybridization with fuel cell battery supercapacitor optimum sizing and comparative techno economic analysis
Sustainable Energy Technologies and Assessments, 2020Co-Authors: Om Krishan, Sathans SuhagAbstract:Abstract In this paper, a comparative techno-economic assessment of two different hybrid energy storage system configurations viz. fuel cell-battery energy storage system (FC-BESS) and fuel cell-supercapacitor energy storage system (FC-SCESS), incorporated in a grid-independent photovoltaic (PV) based Power system for a residential building is performed. Firstly, load for the residential building is calculated and accordingly optimum sizing of various constituents of the PV system is obtained using HOMER. Subsequently, the economic analysis for both configurations is performed in terms of cost of energy, net present cost, initial cost, and operating and maintenance cost. The simulation results of HOMER suggest that for grid-independent PV based Power system, FC-SCESS configuration is better from the economic point of view. As HOMER’s inability to perform detailed technical analysis, MATLAB/Simulink models of both configurations are built and comparative analysis is performed in terms of different technical aspects such as Active Power Balance, DC link voltage (VDC) regulation etc. From MATLAB results, it is observed that FC-SCESS configuration performs better by regulating the VDC more effectively and thereby helps maintain the Active Power Balance between various constituents of the Power system. Furthermore, feasibility of hardware implementation of each configuration is verified using hardware-in-loop real-time digital simulator.
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Techno-economic analysis of a hybrid renewable energy system for an energy poor rural community
Journal of energy storage, 2019Co-Authors: Om Krishan, Sathans SuhagAbstract:Abstract Grid-independent hybrid renewable energy systems (HRESs), being eco-friendly and cost effective, are turning out to be more effective option for the rural areas where grid Power availability is poor. This paper presents the techno-economic analysis and optimum design of a HRES, as proposed to meet out the residential and agricultural electric load requirements of an energy poor community of Yamunanagar district in the State of Haryana, India. Three different optimal configurations, viz. wind/battery, PV/battery and wind/PV/battery are compared in respect of net present cost (NPC) and cost of energy (COE) to determine most economically viable option. For economic analysis and optimum sizing, all the necessary modelling and simulation is carried out using HOMER (Hybrid Optimization Model for Electric Renewable) software. From the simulation results, it is established that wind/PV/battery based HRES is the most cost-effective configuration for the specific location this investigation is about and also the optimum sizes of the different components are obtained. Further, for technical analysis, a MATLAB/Simulink model of the optimized system is built and its effectiveness is demonstrated in terms of maintaining Active Power Balance between the different components of HRES as well as keeping DC link voltage (VDC) and output AC voltage constant, irrespective of variations in solar irradiance, wind speed and connected load. The novelty of this work lies in using both HOMER and MATLAB simulation tools sequentially to carry out techno-economic analysis of the proposed HRES and validate the proposition.
Om Krishan - One of the best experts on this subject based on the ideXlab platform.
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grid independent pv system hybridization with fuel cell battery supercapacitor optimum sizing and comparative techno economic analysis
Sustainable Energy Technologies and Assessments, 2020Co-Authors: Om Krishan, Sathans SuhagAbstract:Abstract In this paper, a comparative techno-economic assessment of two different hybrid energy storage system configurations viz. fuel cell-battery energy storage system (FC-BESS) and fuel cell-supercapacitor energy storage system (FC-SCESS), incorporated in a grid-independent photovoltaic (PV) based Power system for a residential building is performed. Firstly, load for the residential building is calculated and accordingly optimum sizing of various constituents of the PV system is obtained using HOMER. Subsequently, the economic analysis for both configurations is performed in terms of cost of energy, net present cost, initial cost, and operating and maintenance cost. The simulation results of HOMER suggest that for grid-independent PV based Power system, FC-SCESS configuration is better from the economic point of view. As HOMER’s inability to perform detailed technical analysis, MATLAB/Simulink models of both configurations are built and comparative analysis is performed in terms of different technical aspects such as Active Power Balance, DC link voltage (VDC) regulation etc. From MATLAB results, it is observed that FC-SCESS configuration performs better by regulating the VDC more effectively and thereby helps maintain the Active Power Balance between various constituents of the Power system. Furthermore, feasibility of hardware implementation of each configuration is verified using hardware-in-loop real-time digital simulator.
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Techno-economic analysis of a hybrid renewable energy system for an energy poor rural community
Journal of energy storage, 2019Co-Authors: Om Krishan, Sathans SuhagAbstract:Abstract Grid-independent hybrid renewable energy systems (HRESs), being eco-friendly and cost effective, are turning out to be more effective option for the rural areas where grid Power availability is poor. This paper presents the techno-economic analysis and optimum design of a HRES, as proposed to meet out the residential and agricultural electric load requirements of an energy poor community of Yamunanagar district in the State of Haryana, India. Three different optimal configurations, viz. wind/battery, PV/battery and wind/PV/battery are compared in respect of net present cost (NPC) and cost of energy (COE) to determine most economically viable option. For economic analysis and optimum sizing, all the necessary modelling and simulation is carried out using HOMER (Hybrid Optimization Model for Electric Renewable) software. From the simulation results, it is established that wind/PV/battery based HRES is the most cost-effective configuration for the specific location this investigation is about and also the optimum sizes of the different components are obtained. Further, for technical analysis, a MATLAB/Simulink model of the optimized system is built and its effectiveness is demonstrated in terms of maintaining Active Power Balance between the different components of HRES as well as keeping DC link voltage (VDC) and output AC voltage constant, irrespective of variations in solar irradiance, wind speed and connected load. The novelty of this work lies in using both HOMER and MATLAB simulation tools sequentially to carry out techno-economic analysis of the proposed HRES and validate the proposition.
Seungil Moon - One of the best experts on this subject based on the ideXlab platform.
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decentralised Active Power control strategy for real time Power Balance in an isolated microgrid with an energy storage system and diesel generators
Energies, 2019Co-Authors: Hyeonjin Moon, Youngjin Kim, Jaewon Chang, Seungil MoonAbstract:Remote microgrids with battery energy storage systems (BESSs), diesel generators, and renewable energy sources (RESs) have recently received significant attention because of their improved Power quality and remarkable capability of continuous Power supply to loads. In this paper, a new proportional control method is proposed using frequency-bus-signaling to achieve real-time Power Balance continuously under an abnormal condition of short-term Power shortage in a remote microgrid. Specifically, in the proposed method, the frequency generated by the grid-forming BESS is used as a global signal and, based on the signal, a diesel generator is then controlled indirectly. The frequency is controlled to be proportional to the AC voltage deviation of the grid-forming BESS to detect sudden Power shortages and share Active Power with other generators. Unlike a conventional constant-voltage constant-frequency (CVCF) control method, the proposed method can be widely applied to optimise the use of distributed energy resources (DERs), while maintaining microgrid voltages within an allowable range, particularly when Active Power Balance cannot be achieved only using CVCF control. For case studies, a comprehensive model of an isolated microgrid is developed using real data. Simulation results are obtained using MATLAB/Simulink to verify the effectiveness of the proposed method in improving primary Active Power control in the microgrid.
Miguel Montilladjesus - One of the best experts on this subject based on the ideXlab platform.
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modeling and control of lcc rectifiers for offshore wind farms connected by hvdc links
IEEE Transactions on Energy Conversion, 2017Co-Authors: Miguel Angel Cardielalvarez, Jose Luis Rodriguezamenedo, Santiago Arnaltes, Miguel MontilladjesusAbstract:This paper presents a voltage and frequency control (VFC) and an average-value model (AVM) of a line-commutated converter for a rectifier station in an offshore wind farm (OWF) connected by a high-voltage direct current link. A capacitor bank is placed at the AC terminals of the rectifier station to perform VFC within the OWF. The proposed model uses the Active and reActive Power generated by the OWF as inputs, while the state variables are the voltage magnitude and phase angle at the capacitor bank bus. The proposed VFC is based on the orientation of the voltage vector at the capacitor bank bus toward a synchronous reference axis. It is then demonstrated that frequency control is achieved by regulating the reActive Power Balance at the capacitor bank bus, while voltage control is carried out by regulating the Active Power Balance. Moreover, it is demonstrated that in a diode rectifier, although voltage cannot be controlled as in a thyristor rectifier, it is bounded within acceptable limits. In addition, small-signal study is performed to facilitate controller design and system stability analysis. VFC and the accuracy of the proposed AVM are validated by simulation, using both the proposed AVM and a detailed switching model.
Xibo Yuan - One of the best experts on this subject based on the ideXlab platform.
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control of variable pitch and variable speed direct drive wind turbines in weak grid systems with Active Power Balance
Iet Renewable Power Generation, 2014Co-Authors: Xibo YuanAbstract:In the case of operating in a weak grid system, when wind Power becomes a significant portion of the Power system or even the sole energy source, the wind Power generators and converters are expected to help maintain the grid voltage. The grid-side converter needs to work as a voltage source to help regulate the terminal (grid) voltage amplitude and frequency by adjusting the reActive Power and Active Power flow, respectively. For a direct-drive permanent magnet synchronous generator with a full Power converter, the Active Power must be provided by the captured wind Power. The Active Power flow between the source (captured wind Power) and the grid (load) must be Balanced by Actively controlling the generator speed and wind turbine pitch angle. In the study, the coordinated control of generator speed and blade pitch angle is proposed together with a dc-link voltage controller. A model of the grid-side converter operating as a voltage source has been built and the strategy regarding voltage and frequency regulation is presented. Simulation is carried out with different wind and load profile. The results show the wind energy can help support the weak grid and Power the local grid in stand-alone mode as well.
