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| 1 | Optimized Fuzzy Controller for MPPT of Grid-connected PV Systems in Rapidly Changing Atmospheric Conditions显示文摘Due to nonlinear behavior of power production of photovoltaic(PV)systems,it is necessary to apply the maximum power point tracking(MPPT)techniques to generate the maximum power.The conventional MPPT methods do not function properly in rapidly changing atmospheric conditions.In this study,a fuzzy logic controller(FLC)optimized by a combination of particle swarm optimization(PSO)and genetic algorithm(GA)is proposed to obtain the maximum power point(MPP).The proposed FLC uses the ratio of power variations to voltage variations and the derivative of power variations to voltage variations as inputs and uses the duty cycle as the output.The range of changes in fuzzy membership functions and fuzzy rules are proposed as an optimization problem optimized by the PSO-GA.The proposed design is validated for MPPT of a PV system using MATLAB/Simulink software.The results indicate a better performance of the proposed FLC compared to the common methods. | Majid Dehghani Mohammad Taghipour Gevork B.Gharehpetian Mehrdad Abedi | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，2： | 4 |
| 2 | On the Mechanism of Latex Particles Formation in Polymerization in Heterogeneous Monomer-Water System显示文摘 | Amos Arshaki Hovhannisyan Mishal Khaddazh Gayane Karlosi Grigoryan Narine Gevork Grigoryan | 2015 | Journal of Chemistry and Chemical Engineering2015，9，5： | 2 |
| 3 | Biosynthesis of RNA in the nuclear structure of wilted cotton plant leaves显示文摘 | PLEKHANOVA L S Gevork'ian A G Ashirova Z K | 1978 | Biokhimiia1978，43，3： | 1 |
| 4 | Strategic Bidding in Distribution Network Electricity Market Focusing on Competition Modeling and Uncertainties显示文摘Developing the electricity market at the distribution level can facilitate the energy transactions in distribution networks with a high penetration level of distributed energy resources(DERs)and microgrids(MGs).However,the lack of comprehensive information about the marginal production cost of competitors leads to uncertainties in the optimal bidding strategy of participants.The electricity demand within the network and the price in the wholesale electricity market are two other sources of the uncertainties.In this paper,a day-ahead-market-based framework for managing the energy transactions among MGs and other participants in distribution networks is introduced.A game-theory-based method is presented to model the competition and determine the optimal bidding strategy of participants in the market.Robust optimization technique is employed to capture the uncertainties in the marginal cost of competitors.Additionally,the uncertainties in demand are modeled using a scenario-based stochastic approach.The results ob-tained from case studies reveal the merit of considering competition modeling and uncertainties. | Mehrdad Mallaki Mehdi S.Naderi Mehrdad Abedi Saeed D.Manshadi Gevork B.Gharehpetian | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，3： | 1 |
| 5 | Short-term interaction between electric vehicles and microgrid in decentralized vehicle-to-grid control methods显示文摘In this paper,a particular standard MicroGrid(MG)is accurately simulated in the presence of the Electric Vehicles(EVs)participating in decentralized primary frequency control service.It examines effect of number of the participating EVs on the short-term dynamic behaviour.The simulation results confirm that frequency deviation will not definitely become zero even though an unlimited number of the EVs participate.The output power of each EV is determined according to the frequency deviation.On the other hand,the output power of each EV affects the value of the frequency deviation,especially in small-scale MGs and MGs with predominant inductance behaviour.Eventually,an equilibrium point is reached after a new EV is added that depends on the characteristics of the MG and the functions executed in the MG central controller during such a service.Additionally,effect of Reflex method,an advanced charging technique for EVs,on the frequency deviation is examined. | Mahdi Bayati Mehrdad Abedi Gevork B.Gharehpetian Maryam Farahmandrad | 2019 | Protection and Control of Modern Power Systems2019，4，1： | 1 |
| 6 | Book Review显示文摘 | Gevork Hartoonian Andrew Leach | 2006 | Architectural Theory Review2006，，2： | 1 |
| 7 | Non-isolated Step-up DC-DC Converter Based on Switched Capacitor Cells显示文摘A non-isolated high gain step-up DC-DC converter for low power applications is suggested in this study.In the designed transformerless converter,the main switch current and voltage stress is reduced while maintaining high voltage gain.For instance,with a duty cycle of 0.5 a voltage gain equal to 5 is achieved while the normalized switch voltage stress is 0.4.Also,it decreases power losses of active and passive elements.In the proposed converter design,the switched-capacitor(SC)technique is used to obtain maximum voltage transfer gain using only one switch.The three modes of operation,i.e.,continuous conduction mode(CCM),boundary conduction mode(BCM),and discontinuous conduction mode(DCM),are studied in detail.The small signal analysis(SSA)of the designed converter is investigated,and its steady-state model is examined under CCM.Performance of the proposed converter proposed in this study is assessed and tested using a prototype.Efficiency of the converter is recorded above 94%in a wide range of output powers.Overall,compared to the other converters,the results suggest satisfactory performance of the designed converter.An issue of the proposed converter is that its input current is not smooth due to using the switched-capacitor cell in its structure.This issue is alleviated by using input filters. | Farid Mohammadi Gevork B.Gharehpetian Hasan Rastegar Mohammad Farhadi-Kangarlu | 2023 | CSEE Journal of Power and Energy Systems2023，9，3： | 0 |
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