Lyapunov based control of hybrid energy storage system in electric vehicles

Abstract

Abstract-This paper deals with a Lyapunov based control principle in a hybrid energy storage system for electric vehicle. The storage system consists on fuel cell (FC) as a main power source and a supercapacitor (SC) as an auxiliary power source. The power stage of energy conversion consists on a boost converter connected with the main source and a buck-boost converter connected with the auxiliary source. The converters share the same dc bus which is connected to the traction motor through an inverter. The aim is controlling power converters in order to satisfy the following requirements: i) tight dc bus voltage regulations, ii) perfect tracking of SC current to its reference, and iii) asymptotic stability of the closed loop system. It is clearly shown, using formal analysis and simulations that the designed controller meets all the objectives.

Control of Cascaded DC–DC Converter-Based Hybrid Battery Energy Storage Systems—Part II: Lyapunov Approach

“…Some generalised studies looked into the application of Lyapunov method in analysing the stability of power converters [18] - [21] using the full switching model of the converter. Lyapunov based control method was also used in hybrid energy storage systems in electric vehicles but using parallel converters [22] - [23].…”

Modeling and nonlinear control of electric power stage in hybrid electric vehicle

“…From Fig.1 applying Kirchhoff laws one gets the following bilinear switching model of the subsystem consisting of a fuel cell source, a supercapacitor and two dcdc power converters [4].…”

“…In order to deal with the two first control objectives, the following errors are introduced To stabilize the dc-dc power converters with the state vector ( 1 e , 2 e , 3 e ), the following control laws are proposed [4]:…”

“…One of the most popular control strategies of the induction motor is the field-oriented control. Many works have studied the control of isolated FC-SC DC sources [4], [12] whereas numerous researchers have analyzed control strategies for the association inverterinduction motor [5], [6], [13]- [15].…”

Nonlinear Control and Observation of a Boost Converter Associated with a Fuel-Cell Source in Presence of Model Uncertainty

“…However the voltage regulation performances fail when the boost converter feeds an unknown load R. In (El Fadil 2007) a backstepping design approach is used in orde,to estimate the load resistance, and to regulate the output voltage.) A Lyapunov based control principle in a hybrid energy storage system associating a FC and a supercapacitor is dealt with in (El Fadil et al 2012. In (El Fadil et al 2011 adaptive output feedback control of interleaved parallel boost converters is used based on Lyapunov stability tools.…”