Intelligent Power Allocation with Load Disturbance Compensator in Fuel Cell/Supercapacitor System for Vehicle Applications
Paper i proceeding, 2020

A fuel cell-based hybrid power system with a supercapacitor can downsize the fuel cell power rating and shows good dynamic characteristics. However, power distribution between fuel cell and supercapacitor is challenging, and inappropriate power allocation strategy will easily cause over-charge or overdischarge of supercapacitor. Also, the DC bus voltage fluctuation is always encountered during the acceleration and deceleration of the vehicle. This paper proposes an intelligent power allocation method based on a low-pass filter. The adaptive cut-off frequency is applied to avoid over-charging and over-discharging the supercapacitor, and the cut-off frequency is calculated by cutting the load spectrum with allocation ratio changing with the state of charge (SoC) of the supercapacitor. A load disturbance compensator is also proposed to suppress the DC bus voltage fluctuation when the load variation occurs. According to the hybrid system model developed with commercially available devices, the feasibility of the strategy is verified by MATLAB/Simulink. The simulation results show that the SoC of the supercapacitor is effectively controlled and the DC bus voltage fluctuation is significantly reduced.

voltage fluctuation

fuel cell

supercapacitor

power allocation

cut-off frequency

load disturbance compensator

Författare

Qian Xun

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Yujing Liu

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Xiaoliang Huang

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo

2020 IEEE Transportation Electrification Conference & Expo (ITEC)
Chicago, IL, USA,

Bränslecellsdrivsystem med svävande spänning

Energimyndigheten, 2018-01-01 -- 2018-08-31.

Cost-effective drivetrains for fuel cell powered EVs

Kompetenscentrum för forskning och utveckling av el- och hybridfordon (SHC), 2017-01-01 -- 2019-06-30.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Ämneskategorier

Kommunikationssystem

Farkostteknik

Annan elektroteknik och elektronik

DOI

10.1109/ITEC48692.2020.9161756

Mer information

Skapat

2020-11-05