Abstract
To address the power distribution problem that occurs in hybrid energy storage systems (HESSs) in electric vehicles, a fuzzy control distribution method is proposed in this paper, taking the vehicle demand power; supercapacitor power, PSC;; and lithium battery power, Pbat, as the inputs and the power distribution factor of the supercapacitor as the output to control the power distribution of the composite energy storage system, in addition to dividing the whole working condition into three time scales, namely, long, medium and short. In this study, we conducted a comprehensive analysis and comparison with typical control methods regarding the energy storage element output power, battery state of charge (SOC) change, energy flow diagram and power frequency. The simulation experiment results show that the proposed strategy is more effective in reducing the peak output power of the power battery, improving the effective power utilization rate of HESS and the effective energy utilization rate. In order to further verify the effectiveness of the control strategy, a pure electric bus power system test bench was built based on similar principles, and a representative time period under the driving conditions of the China city bus (CHTC-B) was selected, involving an acceleration process from 30 to 48 s (process 1), a uniform speed process from 636 to 671 s (process 2) and a regenerative braking process from 1290 to 1304 s (process 3), further verifying the effectiveness and feasibility of the proposed control strategy.
Highlights
The development of the automobile industry has provided convenience to people, it has had adverse effects, such as environmental pollution and greenhouse effects, on the world
In [7], a permanent magnet synchronous motor (PMSM) is used to simulate the traction components of electric vehicles, a new type of fuzzy logic energy management strategy is proposed for a battery–supercapacitor hybrid energy storage system, and its feasibility is verified through experiments
The output of the hybrid energy storage system is mainly related to the required power, Preq ; super-capacitor power, PSC ; and lithium battery power, Pbat, of pure electric buses, and the power of super-capacitors and lithium batteries is closely related to their state of charge
Summary
The development of the automobile industry has provided convenience to people, it has had adverse effects, such as environmental pollution and greenhouse effects, on the world. Effective solutions are urgently required to alleviate this problem. In [1,2,3,4], the authors proposed four energy management strategies to achieve the optimal allocation of required power to reduce consumption. In [6], hybrid energy storage systems are used to effectively solve the above problems, showing that the need for related theories and technological breakthroughs is becoming urgent. In [7], a permanent magnet synchronous motor (PMSM) is used to simulate the traction components of electric vehicles, a new type of fuzzy logic energy management strategy is proposed for a battery–supercapacitor hybrid energy storage system, and its feasibility is verified through experiments. Formulating an optimal control method to optimize vehicle behavior can effectively solve this problem
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
