Novel coordinated power sources switching strategy for transient performance enhancement of hybrid electric vehicles

Abstract

Purpose The purpose of this paper is the investigation of a new coordinated switching strategy to improve the transient performance of a fuel cell (FC)- supercapacitor (SC) electric vehicle. The proposed switching strategy protects FCs from large currents drawn during abrupt power variations. Furthermore, it compensates the poor FC transient response and suppresses the transient ripples occurring during power source switching instants. Design/methodology/approach Coordinated power source switching is achieved using three different transition functions. Vehicle model is fractioned into computational and console subsystems for its simulation using real time (RT) LAB simulator. Blocs containing coordination switching strategy, power sources models and their power electronics interface are placed in the computational subsystem that will be executed, in RT, on one of real time laboratory simulator central processing unit cores. Findings Coordination switching strategy resulted in reducing transient power ripples by 90% and direct current (DC) bus voltage fluctuations by 50%. Switching through transition functions compensated the difference between FC and SC transient responses responsible for transient power ripples. Among the three proposed transition functions, linear transition function resulted in the best transient performances. Originality/value The proposed coordinated switching strategy allows the control of the switching period duration. Furthermore, it enables the choice of adequate transition functions that fit the dynamics of power sources undergoing transition. Also, the proposed switching technique is simple and does not require the knowledge of system parameters or the complex control models.

Fuzzy-Energy-Management-Based Intelligent Direct Torque Control for a Battery—Supercapacitor Electric Vehicle

“…A magnification of the HEV power, speed, and torque during the period [0; 70 s] is provided in Figure 16. It can be seen that the DTC-SVM-based GA resulted in a narrow PMSM torque hysteresis band of 1 N•m, which represents almost one-tenth of the hysteresis band obtained with a two-level inverter in [22]. It can be seen that the battery and the supercapacitor-generated power is equal to the power developed by the PMSM for traction.…”

“…It can be seen that the battery and the supercapacitor-generated power is equal to the power developed by the PMSM for traction. Note that the power sources and motor ripples are very narrow compared with [22,23]. A magnification of the HEV power, speed, and torque during the period [0; 70 s] is provided in Figure 16.…”

“…This short simulation period does not allow for rating the effectiveness of the power management strategy, because the power sources' state of charge will not be affected in a short period. In [22], the performance and lifetime of a hybrid electric vehicle is studied. However, the vehicle in that work is controlled using field-oriented control, which is very sensitive to parameter variation.…”

Advanced Protection for the Smart Grid

“…This has been reflected by recent practical projects (Tang et al, 2015;Li et al, 2017). The system is also efficient in meeting the growing demands in electric vehicle charging Oubelaid et al, 2022b;Oubelaid et al, 2022c;Oubelaid et al, 2022d).…”

New coordinated drive mode switching strategy for distributed drive electric vehicles with energy storage system

“…Fuel economy 11 , vehicular communication systems 12 , intelligent vehicles 13 , 14 , unmanned transportation 15 , power management algorithms 16 , Power train architecture 17 , vehicle safety 18 , grid connected electric vehicles 19 , machine control 20 , 21 and power sources lifespan enhancement 22 , 23 are a prominent current trend in the realm of automotive engineering 24 .…”