Performance investigation of linear and nonlinear controls for a fuel cell/supercapacitor hybrid power plant

Research output: Contribution to journalArticlepeer-review


Colleges, School and Institutes

External organisations

  • School of Electronic, Electrical and Computer Engineering
  • Renewable Energy Research Centre
  • Department of Teacher Training in Electrical Engineering
  • King Mongkut's University of Technology North Bangkok
  • Groupe de Recherche en Electrotechnique et Electronique de Nancy
  • Université De Lorraine


In this paper, linear proportional–integral (PI) and nonlinear flatness-based controllers for dc link stabilization for fuel cell/supercapacitor hybrid power plants are compared. For high power applications, 4-phase parallel boost converters are implemented with a switching interleaving technique for a fuel cell (FC) converter, and 4-phase parallel bidirectional converters are implemented with a switching interleaving technique for a supercapacitor converter in the laboratory. As controls, mathematical models (reduced-order models) of the FC converter and the supercapacitor converter are given. The prototype small-scale power plant studied is composed of a PEMFC system (the Nexa Ballard FC power generator: 1.2 kW, 46 A) and a supercapacitor module (100 F, 32 V, based on Maxwell Technologies Company). Simulation (by Matlab/Simulink) and experimental results demonstrate that the nonlinear differential flatness-based control provides improved dc bus stabilization relative to a classical linear PI control method.


Original languageEnglish
Pages (from-to)454-464
Number of pages11
JournalInternational Journal of Electrical Power and Energy Systems
Publication statusPublished - 1 Jan 2014


  • Converters, Fuel cells, Nonlinear control, Supercapacitor, Voltage control