On the Robust Control of DC-DC Converters: Application to a Hybrid Power Generation System

Abstract

in 4th IFAC Symposium on system, structure and controlInternational audienceIn this paper a complete robust control synthesis is performed for a hybrid power generation structure composed by a Fuel Cell and a Supercapacitor. The control strategies are applied to the DC-DC boost power converters associated to each power source. Multivariable PI control with H∞ performance, H∞ full and reduced order controllers are designed and compared. The multivariable PI controller is designed through an optimization procedure based on solving some Linear Matrix Inequalities. A μ-analysis and frequency/time response performances results shows the advantages of the different proposed control strategies

Design and experimental validation of a robust control method for a hybrid Fuel Cell power generation system

“…Despite this, a better regulation is obtained with the proposed strategy when compared to the simulation result obtained with the classic control ( Figure 13). In the time domain simulation a faster disturbance rejection is obtained with the classic PI control, however a better robustness for the proposed methodology has already been proven in [7]. Furthermore, within the proposed methodology shown in figure 6, the use of the Hoc framework aims toward a systematic control approach.…”

“…For this reason the second structure is retsined for implementation on the real-time testbench. An important advantage of the proposed methodology is the improvement in the control system robustness, as it was already proved using a complete l'-anaIysis for the saroe type of system in [7].…”

“…Following the procedure in [14] the complete formulation for the iLMI algorithm can be found, a simplified algorithm for the MIMO PI controller is presented in [7]. To solve the optimization problem, the Yalmip [17] code under Matlab© was used for the LMI formulation, and SeDuMi 1 is used as a solver.…”

“…For the design of multivariable PI controllers that takes into account certain robustness performance criteria, the use of Static Output Feedback (SOF) and Linear Matrix Inequalities (LMI) methods are proposed, as in [7]. This paper enhaoces some of the preliminary results presented in [7]. In particular, a new control structure is proposed (using a different measurement selection) that improves the closed loop performances.…”

Adaptive Interpolated PI Gain Scheduling for Voltage Regulator in Solar Charge Controller Applications

“…There are some techniques that can be used to control the output voltage level of a DC/DC converter with fast dynamic response over input and load change condition. Among those existing techniques, we can mention some of them such as fuzzy logic control or combined fuzzy PID technique, fuzzyneural PI control method [6], Multivariable robust H-Infinity PI control [7], Robust decentralized control [8], sliding mode control technique [9], gain scheduling technique [10], [11], etc. We propose also a gain scheduling technique with a special contribution to a simple guide to self-tune the PI control gain or parameter.…”