An Investigations into the Fast-and Slow–Scale Instabilities of an Energy Generation System with a Fuzzy Hysteretic Control


ABSTRACT This paper presents an investigation of the nonlinear phenomena in the current mode controlled boost converter. The boost converter is used into an energy generation system with a PEM-Fuel Cell as energy source and a battery stack as energy storage device. The bifurcation diagrams with the reference current as the variable parameter have been obtained. The simulation results show that the converter shifts between period one, period two, higher periods and chaos as the some parameter is varied. The bifurcation phenomena have been reported for a clocked hysteretic controller. Using a clocked fuzzy hysteretic controller, a comparison of the effects on the DC/DC Boost converter response in state space, under reference current variations, load variations, and different component variations is performed.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper studies the "intermittent" chaos and subharmonics observed in switching DC/DC converters using a simple circuit model that describes possible unintended coupling of some weak spurious signal to the converter. The study shows that the signal strength and frequency of the intruding signal are vital parameters that affect the type of intermittent behavior and the period of intermittency. Simulations and experimental results are presented.
    Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual; 07/2003
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper describes the bifurcation phenomena of a system of parallel-connected dc/dc buck converters. The results provide useful information for the design of stable current sharing in a master-slave configuration. Computer simulations are performed to capture the effects of variation of some chosen parameters on the qualitative behavior of the system. These are summarized in a series of bifurcation diagrams. In particular, it is found that while variation of the voltage feedback gains leads to standard period-doubling bifurcation, variation of the current sharing ratio leads to border collision bifurcation. Analysis is presented to establish the possibility of the bifurcation phenomena and to locate the current sharing ratio at which border collision occurs
    IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications 03/2001;
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Power electronics circuits are rich in nonlinear dynamics. Their operation is characterized by cyclic switching of circuit topologies, which gives rise to a variety of nonlinear behavior. This paper provides an overview of the chaotic dynamics and bifurcation scenarios observed in power converter circuits, emphasizing the salient features of the circuit operation and the modeling strategies. In particular, this paper surveys the key publications in this field, reviews the main modeling approaches, and discusses the salient bifurcation behaviors of power converters with particular emphasis on the disruption of standard bifurcation patterns by border collisions. Author name used in this publication: Chi K. Tse
    Proceedings of the IEEE 06/2002; · 6.91 Impact Factor

Full-text (2 Sources)

Available from
May 21, 2014