بررسي، تحليل و شبيه سازي استفاده از ژنراتور القايي دو سو تغذيه در خودروي هيبريد سري

چكيده انگليسي :

Study Analysis and Simulation of Using the Doubly Fed Induction Generator in Series Hybrid Electric Vehicle Hadi Boosaeidi Oshtorjani h boosaeidyoshtorjani@ec iut ac ir boosaeidy@yahoo com Date of Submission June 2 2010 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Persian Supervisor Seyed Morteza Saghaian nezhad saghaian@cc iut ac ir Abstract Considering an extreme increase in both energy price and consumption in the recent years the researchers have focused their studies on fossil fuels consumption optimization as well as renewable energies Today fossil fuel sources are the first choise in transportation systems therefore energy consumption optimization is considered as a significant issue and hybrid electric vehicles HEV play an outstanding role in this regard which even could be considered as a long term solution in fuel consumption optimization There are two basic topologies for the HEVs are named Series and Parallel topology Each of them has its particular applications In this thesis features of Conventional Series Hybrid Electric Vehicle SHEV have been discussed in details first and then application of doubly fed generator has been analyzed in a SHEV to enhance the efficiency The opportunity obtained by use of doubly fed induction generator in a SHEV provides it to have torque and speed coupling separately and electrically In this structure the speed control of internal combustion engine is feasible independently of traction motor speed in a specific region by rotor power control of the machine through sleep control Here to achieve this aim a stator flux vector control has been applied to use doubly fed induction generator as a speed coupling unit Also the oscillation of traction motor torque can be compensated by inserting a DC to AC converter between AC bus and energy storage system to inject the appropriate current to AC bus This Converter is only used to inject the current in phase with the phase voltage and not to produce reactive power Utilization of doubly fed generator in a SHEV leads to loss reduction arisen by the power conversion and then to efficiency enhancement of whole system However an appropriate control method should be used considering the operation of all parts of system There are two basic methods used in a conventional SHEV to control the operation of the system that are ON OFF and Power Follower In this thesis first these two methods are applied to a SHEV benefiting from doubly fed induction generator The simulation results for the first control confirm the fact that because of low average load power the efficiency of the system does not improve In the second method the circulating power among some parts of the system makes the efficiency not to enhance dramatically To solve these problems in this thesis a new method so called Operating Point Follower is introduced for the SHEV benefiting from doubly fed induction generator in which the traction motor operating point is followed by Internal Combustion Engine ICE over the torque speed surface in a specific region Simulation results confirm the fact that by choosing the appropriate minimum and maximum of torque and speed in the torque speed surface of ICE the efficiency of the whole system can be improved significantly To verify the proposed control method simulation results using Advanced Vehicle Simulator ADVISOR 2002 are presented justifying the theoretical analysis Keywords 1 Hybrid Electric Vehicle HEV 2 Series Hybrid SHEV 3 Doubly Fed Induction Generator DFIG 4 Power Follower Control 5 Operating Point Follower Control

بوسعيدي اشترجاني، هادي

بررسي، تحليل و شبيه سازي استفاده از ژنراتور القايي دو سو تغذيه در خودروي هيبريد سري

HEV , DFIG , تعقيب توان , تعقيب نقطه كار