Tham khảo tài liệu 'electric machines and drives part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Swarm Intelligence Based Controller for Electric Machines and Hybrid Electric Vehicles Applications 189 NEDC FIP7S Driliaj Cycle c The mass of the FC SC components d The mass of the FC SC components Fig. 19. The Comparative of the optimal design between different methods for FC SC HEV Optimal Power Control OPC The second goal of the PSO is to minimize the vehicle fuel hydrogen consumption while maintaining the supercapacitor state of charge. As a hybrid powertrain is under consideration a power management strategy is required to define what both the FC and SC powers are. The global optimization algorithms such as GA and dynamic programming DP achieve an optimal power control for FC SC hybrid electric vehicle which leads to the lowest hydrogen consumption and maintains the supercapacitor SOC Sinoquet et. al 2009 Sundstrom Stefanopoulou 2006 . In this study the optimal power control can be achieved by using PSO and GA for a given driving cycle. Suppose that the degree of hybridization of the fuel cell is Kfc at time t and Ksoc Proportional controller gain which used to adapt the SOC during charging from the FC. A balance equation can naturally be established since the sum of power from both sources has to be equal to the required power at all times 190 Electric Machines and Drives P t pfc t Psc t ĩeq 70 Kfc t Pfc t P. t req 71 The net energy consumed from the FC at time t can be computed as follows t Efc t 0 Pfc t n Pfc t dt 72 The cost function can be expressed as follows 1 N pfcovti k 73 F_ x ỷ yOpy. ET 2 Elow Kz 0n PfcOptI k The Optimal fuel cell power output PfcOpti is calculated based on the SOC of the supercapacitor and power demand Preq as follows pfcopi k Kfc k Preq k Ksoc k pcmax - pfcmn SOCref - SOC k SOC -SOC 2 v max min 74 Fig. 20. The block diagram of the Optimal power Control Where N T AT is number of samples during the driving cycle and AT 1s is the sampling time. The block diagram of the optimal power control based on optimization algorithm is .
