An adaptive power split strategy with a load disturbance compensator for fuel cell/supercapacitor powertrains
Artikel i vetenskaplig tidskrift, 2021

Electric vehicles powered by fuel cell and supercapacitor hybrid power sources are of great interest. However, the power allocation between each power source is challenging and the DC bus voltage fluctuation is relatively significant in cascaded PI control schemes. This paper develops a power control strategy with an adjustable cut-off frequency, using an artificial potential field, to adaptively split the load current between the fuel cell and the supercapacitor under various load conditions. The adaptive cut-off frequency is calculated by cutting the load frequency spectrum with an allocation ratio that changes with the supercapacitor state of charge. Therefore, the relatively lower frequency portion of the load current is provided by the fuel cell and the supercapacitor handles the higher frequency portion. To enhance the control performance of the DC bus voltage regulation against the load disturbance, a load disturbance compensator is introduced to suppress the DC bus voltage fluctuation when the load variation occurs, which is implemented by a feed-forward controller that can compensate the load current variation in advance. The effectiveness of the proposed strategy is validated by extensive experiments.

Supercapacitor

Power allocation

Load disturbance compensator

Cut-off frequency

Fuel cell

Författare

Qian Xun

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Vicente Roda

Consejo Nacional de Investigaciones Cientificas y Tecnicas

Yujing Liu

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Xiaoliang Huang

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Ramon Costa-Castello

Consejo Nacional de Investigaciones Cientificas y Tecnicas

Journal of Energy Storage

2352-152X (eISSN)

Vol. 44 103341

Ämneskategorier

Annan kemiteknik

Kommunikationssystem

Annan elektroteknik och elektronik

DOI

10.1016/j.est.2021.103341

Mer information

Senast uppdaterat

2021-11-23