A buck pulsewidth modulated zero-current switching quasi-resonant converter (buck PWM ZCS QRC) operating at constant frequency is discussed. Operating principle and design-oriented analysis are presented with normalized design curves, procedure, example, simulations, experimental results. The new topology, which can be considered as a particular one, compared the well-established frequency-modulated FM proposed by Fred C. Lee (1988).< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...

High step-up conversion is an indispensable feature for the power processing of low voltage renewable sources in grid-connected systems. Motivated by this necessity, paper presents a study on non-isolated dc-dc converters based conventional Boost converter that can provide such with high efficiency. By topological variation and gain cell concepts, it demonstrated these be treated as unique generalized converter, called Converter Gain Cell (BCGC). The operating principle, key waveforms...

Due to the plethora of non-isolated high gain step-up dc-dc converters presented in literature, it has become important comprehensively review and classify them, as well derive methods generalize usage commonly employed techniques. Motivated by this need, paper not only proposes a new family step up converter, but generalized methodology them from any classical topology applying coupled inductor voltage multiplier cells. For illustrating methodology, based on basic topologies (Buck, Boost,...

In maximum power point (MPP) applications the DC-DC tracker converter is as important MPP tracking algorithm. this paper, Buck, Boost, Buck-Boost, Cu¿k, Sepic and Zeta converters are analyzed in order to determine which one more proper be applied Maximum Power Point Tracker (MPPT). The proposed analysis take into account radiation temperature conditions, besides load connected at photovoltaic module. comparison among related based in, both, analytical simulation results.

This paper presents a temperature-based Maximum Power Point Tracker (MPPT) algorithm applied to photovoltaic (PV) systems. The proposed MPPT method (MPPT-temp) employs LM35 temperature sensor in order obtain sample of the module surface and, from it, calculate optimal voltage be imposed across device. Unlike Hill Climbing methods, which employ and current sensors estimate MPP, MPPT-temp is substituted by one, implying some advantages as cost reduction, accomplishment MPP even during sudden...

Photovoltaic maximum power point tracker (MPPT) systems are commonly employed to maximize the photovoltaic output power, since it is strongly affected in accordance incident solar radiation, surface temperature and load-type changes. Basically, a MPPT system consists on dc-dc converter (hardware) controlled by tracking algorithm (software) combination of both, hardware software, defines efficiency. This paper shows that even when most accurate employed, cannot be found, its imposition as...

A commutation cell is proposed that destined to replace the conventional hard switched one in PWM DC-DC converters, with following advantages: at zero-voltage for both active and passive semiconductor, constant frequency, no overvoltage across switches, additional current stress comparison switching converter counterpart. Auxiliary components rated very small are used. Both main auxiliary switches gated by same signal, rendering simple drive circuitry. The principle of operation analysis...

This paper presents the analysis of ZETA converter operating in discontinuous conduction mode (DCM) for power factor correction. The main attraction is that it a naturally isolated structure, which allows regulated output voltage with only one processing stage. principle operation, mathematical analysis, design procedure and experimental results obtained from laboratory prototype are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

This article presents a magnetic structure for coupled inductor filters that simplifies the adjustment of coupling factor between windings and target mutual self-inductances, to achieve zero-ripple input current. The proposed utilizes low-permeability ferrite polymer in core gap. design significantly reduces fringing flux restricts leakage path, allowing precise tuning path simplifying circuit design. proposal also decreases required number turns each windings, increasing overall power...

ABSTRACT The lifespan of a converter depends on the reliability its components. In non‐redundant designs like buck converters, single component failure can shut down circuit. Capacitors are most prone to compared inductors and semiconductors. Monitoring parameters equivalent series resistance, rather than relying manual data, helps assess converter's useful life. This article compares two parameter estimation methods: recursive state space non‐linear least squares. R 2 value residuals...

In this work a simple and robust system to be used with electrical energy generated by photovoltaic modules is proposed. Through system, the produced directly injected into electric grid utility. It does not need batteries since it operates connected grid. The supply occurs in periods where sunlight present, standby when light supplied. adopted control strategy allowed production of current little harmonic distortion, simplifying reducing size number components, both as well output filter....

Photovoltaic (PV) thin-film modules normally present higher voltages at the maximum power points than crystalline silicon ones. This feature makes usage of low-voltage MOSFETs (≤100 V) unfeasible in high step-up boost-based converters. In order to solve this drawback, paper proposes a novel nonisolated dc-dc converter based on classical synchronous buck with coupled inductor and voltage multiplier techniques. Besides reducing stress active switches, proposed also requires lower core-window...

The I-V curve tracer is an instrument that captures the current-voltage characteristics of photovoltaic (PV) generators under real operating conditions. Such device can be used to evaluate their performance and identify faults or aging effects, but its high costs have prevented it from being widely in industry. This article thus proposes design a low-cost, portable based on classic dc-dc Ćuk converter for PV modules up 300 W. In order obtain compact device, some techniques are proposed,...

This paper presents the analysis of a static conversion system for treatment solar energy from photovoltaic panels. is interconnected with mains power supply, contributing to generation electrical energy. The structure composed current-fed push-pull converter, buck and current inverter. main features are: simple control strategy, robustness, lower harmonic distortion natural isolation. principle operation, design procedure experimental results are presented.

A converter topology referred to as true pulsewidth modulated zero-voltage switching pole with very low additional RMS current stress is presented. The main switches are turned on and off at without overvoltage stress, from non-load up full-load. It regulated by the conventional PWM. Auxiliary devices, such diodes, transistors, inductors, autotransformers, employed, but rated current, leading high efficiency compactness. Analysis, design, simulation, experimental results provided. suitable...

In this work, the study of a system for exploitation energy provided from photovoltaic panels is presented. Through converted, adapted and injected into electric utility grid. way an amount electrical consumed by one given customer produced, having advantage that it can be installed easily in proper place consumption, dispensing use transmission system. The current has sinusoidal shape output, taking as reference grid, obtaining low total harmonic distortion, thus quality preserved....

This paper presents a three-phase grid-connected photovoltaic generation system with unity power factor for any situation of solar radiation. The model the PWM inverter and control strategy using dq0 transformation are proposed operates as an active filter capable compensate harmonic components reactive power, generated by other loads connected to system. A input voltage clamping technique is between grid system, where it intended achieve maximum point operation. Simulation results analyses...

This paper presents a zero-voltage (pulsewidth modulation) half-bridge inverter with active voltage clamping using only single auxiliary switch. The structure is particularly simple and robust. It very attractive for single-phase high-power applications. Switching losses are reduced due to implementation of the snubber circuit that provides zero-voltage-switching conditions all switches, which includes one. Its main features modulation strategy, robustness, low weight volume, harmonic...

Photovoltaic applications are increasing rapidly, thus, an accurate photovoltaic module modeling is requested in order to allow plants simulations. This paper presents a mathematical describe numerically modules and arrays, taking into account the radiation temperature effects on output voltage, current power. A comparison between simulation experimental results presented, considering Kyocera KC200GT data-sheet information.

This paper presents a three-phase grid-connected photovoltaic generation system with unity power factor for any situation of solar radiation. The model the PWM inverter and control strategy using <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dq0</i> transformation are proposed. operates as an active filter capable compensate harmonic components reactive power, generated by other loads connected to system. An input voltage clamping technique is...

Maximum Power Point Trackers (MPPT) systems are essential devices employed to maximize the power flow from a photovoltaic module (or array) load. In most applications, MPPT is composed by DC-DC converter interposed between and Among main converters, Buck-type Boost-type not proper for this purpose, since they cannot ensure that operation point will match maximum every radiation temperature conditions. On other hand, as it be demonstrated theoretically experimentation, Buck-Boost, Cúk, Sepic,...

Maximum Power Point Trackers (MPPT) are quite required in order to maximize the extracted power from photovoltaic (PV) generators. Since PV module output depends on environmental conditions, tracking algorithm must ensure velocity and accuracy. Traditionally, methods like Constant Voltage, Perturb Observe (P&O) Incremental Conductance (IncCond) widely employed choice one or other static dynamic features. This paper presents a method based temperature measurements, which surface is uses...

This paper presents a three-phase grid-connected photovoltaic generation system with unity power factor for any situation of solar radiation. The modelling the PWM inverter and control strategy using dq0 transformation are proposed. operates as an active filter capable compensate harmonic components reactive power, generated by loads connected to system. An input voltage clamping technique is proposed between grid system, where it intended achieve maximum point operation. Simulation...

Maximum Power Point Trackers (MPPT) systems are essential devices employed to maximize the power flow from a photovoltaic module (or array) load. In most of applications, MPPT is composed by DC-DC converter interposed between referred and Among main converters, Buck-type Boost-type not proper for this purpose, since they cannot ensure that operating point will match maximum all radiation temperature conditions. On other hand, as it be demonstrated theoretically experimentation, Buck-Boost,...

This paper presents a grid-connected PV system in centralized configuration constructed through three-phase dual-stage inverter. For the DC-DC stage series resonant converter is chosen thanks to advantages that it exhibits. However, inadequate for accomplishment of MPPT, due its efficiency strongly depending on implemented deadtime and switching frequency. Then, this proposes conceptual modification, is, modified inverter which responsible both MPPT grid-current control. In addition,...