Reduced-order LPV controller for coordination of power sources within multi-source energy systems. Issue 14 (2015)

• Record Type: Journal Article
• Authors: Nwesaty, W.; Bratcu, A.I.; Sename, O.
• Is Part Of: IFAC-PapersOnLine. Volume 48:Issue 14(2015)
• Page Start: 132
• Page End: 137
• Publication Date: 2015
• Subjects: H∞ control -- LPV systems -- power source coordination -- frequency separation -- electric vehicle; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2015.09.446
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: In this paper an order-reduction approach for multi-variable LPV/H∞ controller is presented and applied to design a power source coordination strategy within a multi-source energy system. The energy system has three different kinds of power sources - fuel cell, battery and supercapacitor - which compose the power supply system of an electric vehicle. All sources are paralleled together with their associated DC-DC converters on a common DC- link coupled to vehicle's electrical motor and its converter. DC-link voltage must be regulated in spite of load power variations corresponding the driving cycle. A reduced LPV controller is obtained using the ISTIA algorithm. It shows to have a special form consistent with the physical properties of the studied system. The MIMO LPV reduced controller is proved to ensure quadratic stability of the closed-loop system. Besides, this controller could be implemented with smaller computational burden. The nonlinear multi-source system is simulated in MATLAB®/Simulink® using the Normalized European Driving Cycle (NEDC) as load profile. Simulation shows good performance of the reduced-order LPV/H∞ controller to be used in power sharing strategy.