scholarly journals Performances of an Interleaved High Step-Up Converter with Different Soft-Switching Snubbers for PV Energy Conversion Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Sheng-Yu Tseng ◽  
Hung-Yuan Wang ◽  
Chih-Yang Hsu
Keyword(s):  
Energy Conversion ◽  
Power Level ◽  
Soft Switching ◽  
Maximum Power ◽  
Experimental Results ◽  
Output Power Level ◽  
Point Tracking ◽  
Switching Losses ◽  
Power Point ◽  
Observation Method

This paper proposes an interleaved high step-up converter with different soft-switching snubbers for PV energy conversion applications. For the high step-up converter, interleaved and coupled-inductor technologies are used to reduce output ripple current and increase output power level. Simultaneously, two types of snubbers, a single-capacitor snubber and boost type snubber, are introduced separately into the discussed converters for comparing their performances of conversion efficiency and switching losses. For drawing maximum power from the PV arrays, a perturbation-and-observation method realized with the microcontroller is adopted to achieve maximum power point tracking (MPPT) algorithm and power regulating scheme. Finally, two prototypes of the interleaved coupled-inductor boost converter with a single-capacitor snubber and with boost type snubber are implemented, respectively. The experimental results obtained are used to verify and compare the performances and feasibilities of the discussed converters with different snubbers in PV conversion applications. The experimental results show that the proposed system is suitable for PV energy conversion applications when the duty ratios of switches of the converter are less than 0.5.

scholarly journals Photovoltaic Power System with an Interleaving Boost Converter for Battery Charger Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Sheng-Yu Tseng ◽  
Cheng-Tao Tsai
Keyword(s):  
Power System ◽  
Boost Converter ◽  
Maximum Power ◽  
Battery Charger ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Switching Losses ◽  
Power Point Tracking ◽  
Power Point ◽  
Observation Method

This paper proposes a photovoltaic (PV) power system for battery charger applications. The charger uses an interleaving boost converter with a single-capacitor turn-off snubber to reduce voltage stresses of active switches at turn-off transition. Therefore, active switches of the charger can be operated with zero-voltage transition (ZVT) to decrease switching losses and increase conversion efficiency. In order to draw the maximum power from PV arrays and obtain the optimal power control of the battery charger, a perturbation-and-observation method and microchip are incorporated to implement maximum power point tracking (MPPT) algorithm and power management. Finally, a prototype battery charger is built and implemented. Experimental results have verified the performance and feasibility of the proposed PV power system for battery charger applications.

scholarly journals Design And Implementation Soft-switching MPPT SEPIC Converter Using P&O Algorithm

2018 ◽  
Vol 43 ◽  
pp. 01010 ◽  
Author(s):  
M Luki Septya ◽  
Indhana Sudiharto ◽  
N Syechu Dwitya ◽  
Ony Asrarul Qudsi ◽  
Epyk Sunarno
Keyword(s):  
Soft Switching ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Design And Implementation ◽  
Point Tracking ◽  
Switching Losses ◽  
Power Point Tracking ◽  
Perturb And Observe ◽  
Power Point ◽  
Switching Method

This paper presents details of design and implementation of Maximum Power Point Tracking (MPPT) SEPIC Converter to maximize Photovoltaic (PV) power output. Perturb and observe (P & O) algorithm has been used as a tracking technique to determine MPPT. This algorithm are simple and efficient to determine the maximum power point (MPP). The soft-switching method will be added to the implementation of MPPT SEPIC Converter to reduce switching losses. The results show that the proposed MPPT method implementation can increase the output power of PV.

Simulation of an Improved Method of Maximum Power Point Tracking for Photovoltaic Array

2011 ◽  
Vol 130-134 ◽  
pp. 3472-3475
Author(s):  
Gang Zhao ◽  
Hui Jiang
Keyword(s):  
Maximum Power ◽  
Improved Method ◽  
Maximum Power Point ◽  
Accuracy Requirement ◽  
Photovoltaic Array ◽  
Power Oscillation ◽  
Point Tracking ◽  
Wide Range ◽  
Power Point ◽  
Observation Method

It needs to track the maximum power point for enhancing the output power of the photovoltaic power generation systems. Perturbation and observation (P&O) method is one of the control algorithms to realize maximum power tracking, which has extremely wide range of application because its tracking method is simple, the control circuit is easy to digitize and it is not strict to the accuracy requirement of sensor, etc. Comparing with traditional constant-step perturbation and observation method, which has disadvantages of power oscillation and slow tracking speed, this paper presents an improved method. The system is established in Matlab/Simulink, and the simulation results show that this method can track the maximum power point of the photovoltaic array quickly and accurately and the power oscillation is feeble.

An Overview of Maximum Power Point Tracking Techniques for Wind Energy Conversion Systems

2012 ◽  
Vol 622-623 ◽  
pp. 1030-1034 ◽  
Author(s):  
Ram Meenakshi ◽  
Ranganath Muthu
Keyword(s):  
Wind Energy ◽  
Energy Conversion ◽  
Maximum Power Point Tracking ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Wind Energy Conversion ◽  
Wind Energy Conversion Systems ◽  
Point Tracking ◽  
Energy Conversion Systems ◽  
Power Point

This paper presents on overview of maximum power point tracking (MPPT) techniques for different types of wind energy conversion systems (WECS). In order to obtain maximum power from the wind turbine (WT), variable speed wind energy conversion systems (VSWECSs) are preferred over constant speed wind energy conversion systems (CSWECSs).In VSWECS, the rotational speed of the turbine is varied by controlling the aerodynamic or electrical parameters of WECS to maintain a constant tip-speed ratio (TSR). This is called maximum power point tracking and different techniques are applied to WECS namely Squirrel Cage Induction Generators (SCIGs) based WECS, Permanent Magnet Synchronous Generators (PMSGs) based WECS.

Design, optimisation and application of a resonant DC link inverter for solar energy systems

2014 ◽  
Vol 33 (5) ◽  
pp. 1761-1776 ◽  
Author(s):  
Ilhami Colak ◽  
Mehmet Demirtas ◽  
Ersan Kabalci
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Boost Converter ◽  
Maximum Power ◽  
Solar Panels ◽  
Maximum Power Point ◽  
Content Type ◽  
Switching Losses ◽  
Power Point ◽  
Zero Voltage

Purpose – The purpose of this paper is to examine diminish switching losses in a solar energy conversion system in order to utilise the full efficiency of a solar panel. Design/methodology/approach – In this paper, a boost converter and a resonant DC link (RDCL) inverter are controlled by a microcontroller. The maximum power point tracker (MPPT) algorithm implemented for boost converter supplies to track maximum power point of solar panel. The Class D full-bridge resonant inverter (RI) that is considered to be supplied by boost converter is modeled and zero voltage switching operation is performed by controlling the inverter with sinusoidal pulse width modulation (SPWM) control scheme. The control algorithm is managed with a feedback detecting the current of the boost converter and the zero voltage levels of capacitor voltage in the resonant circuit. Findings – There are several control techniques have been proposed to reduce switching losses and harmonic contents in conventional or RDCL inverters. Solar panels are used in low power applications among other renewable energy sources. By considering that the efficiency parameter of an actual solar panels is around 14∼17 per cent, the switching losses occurred in energy conversion systems causes the efficiency are reduced. Originality/value – The proposed approach has been decreased the switching power losses owing to resonant DC link inverter while the developed MPPT algorithm provides to generate maximum power. This paper introduces a novel soft switching technique in solar energy applications in order to maximise the possible efficiency.

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