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...

A study of a DC–DC boost converter fed by photovoltaic (PV) generator and supplying constant voltage load is presented. The input port the controlled using fixed frequency pulse width modulation (PWM) based on loss-free resistor (LFR) concept whose parameter selected with aim to force PV work at its maximum power point. Under this control strategy, it shown that system can exhibit complex nonlinear behaviors for certain ranges values. First, models source, dynamics are explored in terms some...

An efficiency comparison between a boost converter implemented with silicon (Si) devices and the same in other three cases, that is, employing two combinations of carbide (SiC) mixture Si SiC elements is presented. The has been designed for high-voltage low-power applications required by light-emitting diode (LED) lighting. performed on an equal basis discusses influence semiconductor power passive components. experiments are carried out single-stage prototype delivering maximum output...

The recent emergence of plug-in electric vehicles in a global market can offer big challenges and opportunities for both basic applied research. Although the electrical architecture Electric Vehicle (EV) or an Hybrid (HEV) be considered standardized, development its different building blocks is open problem whose solution could contribute to improve significantly performance vehicle. This paper details design control bidirectional DC/DC converter particularity chosen topology by means...

In this paper, a combined analytical-numerical methodology is developed for detecting subharmonic oscillation in H-bridge inverters with an LC filter and under double edge modulation. The prediction of phenomenon accomplished accurately by combining analytical expressions computational procedures to determine the switching instants corresponding periodic orbits. Different approximate closed-form stability boundary are derived revealing effect parameters system on its dynamical behavior...

In this work, we present an electronic system that simplify the incorporation of additional sources to a previously existent small PV system. Particularly, investigate how proceed with low voltage, high-current PEM fuel-cell. The proposed is developed from concept loss-free resistor, and can be easily adapted any type energy source storage elements. Among advantages system, array keeps its maximum power point (MPP), independence delivered by new source. addition, allows also particular MPPT...

Hysteretic comparators are often used to implement sliding‐mode controllers or other type of discontinuous regulators for power switching converters. Their design is usually performed analogically yielding robust and fast that can even allow converter operation with high values duty cycle. A new analogue implementation based on a low‐cost microcontroller described in this study showing the mentioned advantages plus flexibility programmable digital system. The proposed comparator employs some...

Hybrid Distributed systems include many sources, storage elements, and various local loads, connected to a common distribution bus. In this work, different matching methods adapt 3-phase wind alternator variable DC-bus are reviewed, finally modular solution based on single-phase Boost-based PFC's is proposed. Nevertheless, Boost modules must be adapted operate with non-isolated like 3-4 wire, generators. Magnetic coupling introduced here enhance the isolation among phases, reducing also...

Car industries are especially interested on decreasing the power rating of electrical sub-system to reduce wire weight and fuel consumption. Using LED devices, a typical 50W halogen-based car spot-light, could be replaced by array 8-12W. To improve life-time simplify light dimming, all devices series-connected high-voltage current-source driver. This driver, based single-stage boost converter has very high voltage gain. Supplied from 12 V car-battery, limited only commercially-available...

An analysis and design of an asymmetrical full-bridge multilevel converter in sliding-mode operation for inverter applications small power systems are presented. A five-level sinusoidal current source is proposed with the lowest number controllable devices simplest control electronics. The nature achieved by means a loop forcing output to track reference. theoretical predictions have been verified experiments 1 kW prototype both stand-alone grid connection operations.

Small grid-connected PV-systems are quite usual in domestic roofs, but urban integration is still an open issue for wind systems. Similarly to grid PV systems, direct injection a system requires two stages, PFC boost rectifier and grid-tie inverter. Nevertheless, although buck inverter common choice many this topology imposing minimum DC-Link voltage complicates the stage design, because variation range of alternator, greater than margin PV-array, would be absorbed only by first converter....

This paper reports a single-stage grid-supplied boost converter with power factor correction (PFC) for LED-applications using Silicon-Carbide (SiC) and operating at the boundary between continuous discontinuous conduction modes (CCM-DCM) to reduce switching losses. The is supplied by 230 V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rms</inf> grid voltage, attains 1200 DC output port, where a-spot of 320 LEDs connected in series constant...

A major issue in grid connected PV-based renewable energy systems is the addition of new generators without production interruption, avoiding electrical architecture changes. In this work we propose a solution to problem based on sliding mode control. We have tested our with some fuel-cells and wind generator.

Urban integration of wind generators demands direct injection the energy produced to grid. Battery-based electrical storage is usually expensive in terms cost, space, and maintenance. Direct grid-injection implies AC-AC conversion where input source, a synchronous alternator, has variable output voltage frequency. This realized with two converters. The first stage accomplish power factor corrected rectification, whereas second one implements DC-to-AC conversion. Different converter...

A battery-supplied, DC-HID lamp ballast, inspired on the Loss Free Resistor (LFR) concept is presented here. It consists of two stages. The first one, a boost converter, behaves like constant power source. second switched capacitor converter ignitor circuit. cascade connection both converters results in transformerless ballast able to reach voltage 6 kV from 12 V batteries. Among advantages we find: no light flickering, warm-up time reduction, aging effects power, easy dimming control, and...

Multilevel Conversion systems have certain advantages that can be applied in renewable energy systems. To verify we are developing a re-configurable 1 kW prototype. Among the experiments considered, sliding mode control law force this converter to behave like an AC Current Source. We model our set of Tibuck converters operating sequentially. Some experimental results given.