A robust controller design to obtain output voltage regulation in a quadratic boost converter with high dc gain is discussed this paper. The proposed has an inner loop based on sliding-mode control whose sliding surface defined for the input inductor current. current reference value of modified by proportional-integral compensator outer that operates over error. stability two-loop proved using Routh-Hurwitz criterion, which determines region K <sub...

A stability analysis for a maximum power point tracking (MPPT) scheme based on extremum-seeking control is developed photovoltaic (PV) array supplying dc-to-dc switching converter. The global of the algorithm demonstrated by means Lyapunov's approach. Subsequently, applied to an MPPT system "perturb and observe" method. steady-state behavior PV with characterized stable oscillation around point. leads coordinates increasing or decreasing linearly time voltage. Off-line measurements are not...

This paper proposes a fast-response sliding-mode controller for controlling boost-type converters requiring fast dynamical response over wide range of operating conditions. The various aspects the controller, which include method generating reference-current profile, choice sliding surface, existence and stability properties, selection control parameters, are discussed. Experimental results presented to validate theoretical design illustrate strength proposed controller. It is demonstrated...

Switching dc–dc converters are widely used to interface the dc output of renewable energy resources with power distribution systems in order facilitate use at customer side. In case residential photovoltaic (PV) applications, high conversion ratio is usually required, adapt low voltages PV modules a bus voltage, while dealing appropriate impedance matching. this paper, system connected panel consisting two cascaded boost under sliding-mode control and working as loss-free resistors studied....

A quadratic boost converter with high DC gain to step up the voltage of a standard photovoltaic panel 400 V is analysed. First all, comparative analysis among boost, and cubic reveals that exhibits best trade-off between duty ratio range efficiency. hysteretic comparator employed as modulator ensure operation values without risk modulation saturation. two-loop sliding-mode control used regulate output voltage. An internal loop controls cycle by input current whose reference established an...

A new family of low-ripple DC-to-DC switching converters based on a parallel connection N-identical boost with current-mode control (CMC) is presented. The CMC strategy ensures that all the operate at same duty cycle, sharing an equal amount input current and forcing output voltage to be integer multiple (N) voltage. As result, total ripples are extremely low. generation signals from inductor currents feedback without using external triangular or sawtooth another characteristic converter family.

This paper proposes a proton exchange membrane fuel cell control strategy to produce the power requested by an electrical load, minimizing consumption and also providing regulated DC bus voltage load. The system consists of hybrid cell/capacitor topology, objective is follow minimum points for given load profile. done controlling air pump regulating current through DC/DC switching converter. Moreover, design parameters output are discussed, calculations adjusted Ballard 1.2-kW Nexa module....

In this paper, a polymer-electrolyte-membrane fuel-cell (FC) model that is useful for simulation and control purposes presented. The uses both electrical-circuit components functional blocks to reproduce static dynamic FC behaviors. Its main feature in the reproduction of oxygen-excess-ratio behavior, but it also able interact with any electrical device connected at terminals, e.g., load or switching converter. Consequently, proposed can be used develop new strategies aimed avoiding...

Digital implementation of sliding-mode current control applied to dc–dc switching converters is analyzed and developed in this paper. It based on an interpolation predictive strategy that avoids problems associated continuous sampling process the controlled variable minimizes quasi-sliding effects. In addition inherent advantages digital implementation, as programmability, flexibility, complex calculation capability noise immunity, proposed maintains robustness has similar behavior than...

This study describes a digitally controlled power factor correction (PFC) system based on two interleaved boost converters operating with pulsewidth modulation (PWM). Both are independently by an inner control loop discrete-time sliding-mode (SM) approach that imposes loss-free resistor (LFR) behavior each cell. The switching surface implements average current-mode controller so the (PF) is high. SM-based digital designed to operate at constant frequency interleaving technique, which...

Switched power converters are used to interface the dc output in modern distributed generation systems, which usually aggregated main grid yield necessary using interconnected modules. Synthesis, modeling, and stability analysis of systems cascaded working under sliding-mode control considered this paper. A systematic procedure synthesize connection dc-dc boost is introduced. The approach based on making each module behave as a suitable canonical element for processing. Three different...

The cascade connection of two dc–dc switching converters for constant power supply is studied. source converter boost type while the load buck type. natural unstable behaviour both on and off states counteracted by a sliding-mode control strategy that combines trajectories to generate stable one regulated dynamics. Experimental results using an electronic emulate converter-based are in good agreement with theoretical predictions. A similar later obtained when dynamic close instantaneous...

Boost topologies in interleaved operation under sliding-mode control are analyzed this paper. First, the interleaving connection of two identical boost converters results a new step-up structure whose closed-loop dynamics asymptotically stable with good start-up and excellent load regulation when self-oscillating is applied to converter. For duty cycle 50%, regulator acts as small-ripple voltage doubler. Later, an extension doubler yields quadrupler similar dynamic characteristics. Simulated...

This paper presents a new integral control law for boost converter that ensures the stability of large-signal operation. The controller is derived in two steps by means passivity-based theory. First, static law, which global stability, obtained. Secondly, combination storage function this and positive semidefinite results law. proposed regulator satisfies usual transient specifications behaves robustly parameter uncertainty. Global guaranteed even if duty cycle saturation taken into account....

This paper presents the analysis and design of a sliding-mode control boost converter operating in continuous conduction mode that minimizes inrush current provides output voltage regulation front input perturbations load changes. The analytical expression is obtained, conditions to minimize peak are derived. resulting controller implemented analogically employs two switching surfaces. Namely, one surface combined with conventional auxiliary diode branch for start-up, while another used...

This paper presents a power adaptor device, referred to as smart panel allowing the connection of additional energy sources and storage elements domestic photovoltaic (PV) grid-connected system. The output port is designed behave source/sink, thus enabling its hot-swap parallel renewable without modifying their maximum point (MPP). Moreover, device features characteristic with single controllable MPP allows control injected within operating range dc-ac inverter. work design principles such...

This paper reports a single-stage grid-supplied boost converter with power factor correction for light-emitting diode (LED)-applications using Silicon-Carbide (SiC) and operating at the boundary between continuous discontinuous conduction modes to reduce switching losses. The is supplied by 230 VRMS grid voltage, attains 1200-V dc output port, where a-spot of 320 LEDs connected in series constant current. sliding-mode control theory employed analyze regulator dynamics, assuring system...

This paper presents the analysis and design of a very high-voltage-gain single-stage boost converter operating at boundary between continuous conduction mode (CCM) discontinuous (DCM). The is supplied by 12-V car battery attains 1200 V with voltage gain 100. use hysteretic comparator in control loop precludes risk modulator saturation facilitates operation mentioned boundary. Sliding-mode theory applied to analyze dynamic behavior switching regulator establish system stability conditions....

A cascade control strategy is employed in the boost inverter to generate a sinusoidal signal at grid frequency with very low distortion. The internal loop of employs switching surface based on difference inductor currents induce sliding motions power stage. outer turn establishes reference and ensures tracking an external 50 Hz. reported approach analytical equivalent method. root locus capacitor voltages equilibrium point inner obtained assuming constant value reference. In particular case...

This article presents a nonlinear control based on pulsewidth modulation (PWM) and an estimation mechanism of the output power to regulate voltage boost converter supplying constant load (CPL). The controller uses three parameters K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">p</sub> , xmlns:xlink="http://www.w3.org/1999/xlink">E</sub> xmlns:xlink="http://www.w3.org/1999/xlink">A</sub> lending regulator adaptive nature. behavior latter can...

The emergence of DC fast chargers for electric vehicle batteries (EVBs) has prompted the design ad-hoc microgrids (MGs), in which use a solid-state transformer (SST) instead low-frequency service can increase efficiency and reduce volume weight MG electrical architecture. Mimicking conventional gasoline station terms duration simultaneity to several customers led notion ultra-fast chargers, charging time is less than 10 min power higher 350 kW. This survey reviews state-of-the-art stations,...

A two-loop control method for a boost converter, which combines fuzzy and sliding-mode methodologies, is presented. An inner loop controls the inductor current through sliding surface whose reference signal given by slower outer loop. This employs logic mechanism to implement PI controller that guarantees output voltage regulation results in an excellent transient response during start-up. The implementation requires standard analogue devices inexpensive 8-bit microcontroller Experimental...