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Constant frequency operation of parallel resonant converter for constant-current constant-voltage battery charger applications

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Journal of Modern Power Systems and Clean Energy 2019年第1期7卷 186-199页

作者： Taha Nurettin GüCIN Muhammet BIBEROGLU Bekir FINCAN Energy Systems Engineering Department University of Yalova Electrical Engineering Department Istanbul Technical University

This paper proposes a design and control approach to parallel resonant converter(PRC) based battery *** proposed approach is particularly suitable for the constant-current constant-voltage(CC-CV)charging method, which is the most commonly utilized *** the PRC is operated at two different frequencies for each CC and CV charging modes, this approach eliminates the need for complicated control techniques such as the frequency-control and *** proposed method not only simplifies the design and implementation processes of the converter unit but also simplifies the design of output filter configuration and decreases the number of the required components for the control of the *** proposed method is confirmed by two experimental *** results show that the designed charger circuit ensured a very stable constant current in CC charging phase, where the charging current is fixed to 1.75 *** a voltage increase in CV phase is observed, the charger circuit is able to decrease the charging current to 0.5 A in CV phase, as depicted in battery *** efficiency of the charger is figured out to be in the range of 86%-93% in the first setup, while it is found to be in the range of 78%-88% in the second setup,where a high frequency transformer is employed.

关键词： Resonant converter Parallel resonant converter battery charger Constant-current constant-voltage(CC-CV)charging

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Short-term interaction between electric vehicles and microgrid in decentralized vehicle-to-grid control methods

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Protection and Control of Modern Power Systems 2019年第1期4卷 42-52页

作者： Mahdi Bayati Mehrdad Abedi Gevork B.Gharehpetian Maryam Farahmandrad Amirkabir University of Technology No.39511th FloorEntrance 2Block 2Phase 2Ekbatan TownTehran***Iran Bu-Ali Sina University HamedanIran

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 *** examines effect of number of the participating EVs on the short-term dynamic *** simulation results confirm that frequency deviation will not definitely become zero even though an unlimited number of the EVs *** output power of each EV is determined according to the frequency *** 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 ***,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 ***,effect of Reflex method,an advanced charging technique for EVs,on the frequency deviation is examined.

关键词： battery charger Charging station Electric vehicle(EV) Primary frequency control Reflex method Vehicle-to-grid(V2G)

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