scholarly journals A Cascade Multilevel Z-Source Inverter for Photovoltaic System

2015 ◽  
Vol 16 (3) ◽  
pp. 473
Author(s):  
Thirumalini P ◽  
R. Arulmozhiyal ◽  
M Murali
Keyword(s):  
Power Efficiency ◽  
Input Voltage ◽  
Photovoltaic System ◽  
Duty Ratio ◽  
Solar Photovoltaic ◽  
Voltage Range ◽  
Simulink Model ◽  
Linear Load ◽  
Passive Network ◽  
Non Linear Load

This paper describes a multilevel Z-source inverter for solar photovoltaic applications. The conventional power conversion topology performs either buck or boost the input voltage for non linear load depending upon duty ratio and modulation index in a multiple stage conversion with the help of impedance source passive network (L and C), which is usually known as Z-Source, which couples the n level source with input to the power source and increase the power efficiency. The multilevel z network capabilities of inverter are operated in the shoot through state of duty cycle and it acts as a filter to reduces the level of harmonics, stabilize power factor and to increase the output AC voltage range of inverter. To overcome further harmonics, multilevel level operation z source inverter compensates the fundamental level of harmonic in renewable. Proposed work as a whole involves the simulation part to design multilevel inverter. The output of the simulation is obtained by Simulink model using MATLAB.

Design and Realization of Current-Fed Single-Input Dual-Output Soft-Switched Resonant Converter

2019 ◽  
Vol 29 (05) ◽  
pp. 2050069
Author(s):  
Naresh Kumar Reddi ◽  
M. R. Ramteke ◽  
H. M. Suryawanshi
Keyword(s):  
Power Efficiency ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Duty Ratio ◽  
Voltage Range ◽  
Load Voltage ◽  
Zero Current Switching ◽  
Zero Current ◽  
Wide Range ◽  
Single Input

This paper proposes a new single-input dual-output [SIDO] soft-switched resonant full-bridge converter, which has asymmetrical structures for the isolated multiple outputs. The proposed structure is capable of supplying different loads having dissimilar voltage-current characteristics and independent of each other. This converter features wide range of zero current switching (ZCS) turn-off and automatic load-voltage regulation. In automatic load-voltage regulation, converter maintains constant voltage without the need of change in frequency or duty ratio during load change. First, the modes of converter operation are explained and then design of key parameters have been outlined. A laboratory prototype for 380[Formula: see text]V, 500[Formula: see text]W as main output and 24[Formula: see text]V, 50[Formula: see text]W as auxiliary output for an input voltage range of 40–50[Formula: see text]V was built-up and tested. Experimental results confirm the viability of voltage regulation, ZCS and power efficiency of the proposed converter.

Design Technique of High Power Efficiency LLC DC-DC Converters for Photovoltaic Cells

2018 ◽  
Vol 2 (1) ◽  
pp. 30
Author(s):  
Hisatsugu Kato ◽  
Yoichi Ishizuka ◽  
Kohei Ueda ◽  
Shotaro Karasuyama ◽  
Atsushi Ogasahara
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Photovoltaic Cells ◽  
Input Voltage ◽  
Design Technique ◽  
Load Range ◽  
Voltage Range ◽  
Simulation Results ◽  
Secondary Side ◽  
High Power Efficiency

This paper proposes a design technique of high power efficiency LLC DC-DC Converters for Photovoltaic Cells. The secondary side circuit and transformer fabrication of proposed circuit are optimized for overcoming the disadvantage of limited input voltage range and, realizing high power efficiency over a wide load range of LLC DC-DC converters. The optimized technique is described with theoretically and with simulation results. Some experimental results have been obtained with the prototype circuit designed for the 80 - 400 V input voltage range. The maximum power efficiency is 98 %.

scholarly journals Performance of Rooftop Grid Connected Solar Photovoltaic System

2020 ◽  
Vol 9 (1) ◽  
pp. 1056-1062
Keyword(s):  
Electric Power ◽  
Power Efficiency ◽  
Polycrystalline Silicon ◽  
Photovoltaic System ◽  
Experimental Setup ◽  
Solar Photovoltaic ◽  
Grid System ◽  
Time Data ◽  
Solar Power Generation ◽  
Solar Photovoltaic System

Solar Technology is fast becoming a preferred trend in the field of electric power. This is because of the fact that solar energy, freely available is transferred into electric power without causing any environment hazard. Commercial power system is grid organized system. Therefore, the solar system also needs cooperative to established grid system. Grid connected solar photovoltaic system is a friendly and affordable system for large solar power generation. These systems exhibit good power efficiency beside of their other advantages. Here we pursue our studies on 150 KW grid connected SPV system. In this paper we design and model a 150 KW SPV system and compared its performance with the real time data collected by us through our experimental setup. The experimental setup is based on the module provided by RenewSys DESERV 3M6 with 72 cells on SPV module. This module is a polycrystalline silicon module and was manufactured in the year 2018 and purchased in the same year. In this study important effects that the performance degradation is also considered and the overall results obtained are found satisfactory

scholarly journals Full-Bridge Active-Clamp Forward-Flyback Converter with an Integrated Transformer for High-Performance and Low Cost Low-Voltage DC Converter of Vehicle Applications

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 863 ◽  
Author(s):  
Jaeil Baek ◽  
Han-Shin Youn
Keyword(s):  
High Power ◽  
High Performance ◽  
Low Voltage ◽  
Low Cost ◽  
Primary Root ◽  
Input Voltage ◽  
Oxide Semiconductor ◽  
Duty Ratio ◽  
Voltage Range ◽  
Active Clamp

This paper presents a full-bridge active-clamp forward-flyback (FBACFF) converter with an integrated transformer sharing a single primary winding. Compared to the conventional active-clamp-forward (ACF) converter, the proposed converter has low voltage stress on the primary switches due to its full-bridge active-clamp structure, which can leverage high performance Silicon- metal–oxide–semiconductor field-effect transistor (Si-MOSFET) of low voltage rating and low channel resistance. Integrating forward and flyback operations allows the proposed converter to have much lower primary root mean square (RMS) current than the conventional phase-shifted-full-bridge (PSFB) converter, while covering wide input/output voltage range with duty ratio over 0.5. The proposed integrated transformer reduces the transformer conduction loss and simplify the secondary structure of the proposed converter. As a result, the proposed converter has several advantages: (1) high heavy load efficiency, (2) wide input voltage range operation, (3) high power density with the integrated transformer, and (4) low cost. The proposed converter is a very promising candidate for applications with wide input voltage range and high power, such as the low-voltage DC (LDC) converter for eco-friendly vehicles.

A Flyback Switching Power Supply Based on L6561 for LED

2014 ◽  
Vol 960-961 ◽  
pp. 1264-1267
Author(s):  
Zhu Lei Shao
Keyword(s):  
Power Supply ◽  
Power Efficiency ◽  
Input Voltage ◽  
Maximum Output ◽  
Switching Power Supply ◽  
Output Current ◽  
Voltage Range ◽  
Switching Power ◽  
Switch Power Supply ◽  
Office Equipment

A flyback switching power supply was designed, which can drive LED stability. The switching power supply is the single-ended flyback structure, and based on PWM driver chip L6561. The input voltage range of the switching power supply is 85V to 265V. The output voltage is 15V and the maximum output current is 2A. The switch power supply is suitable for mobile phone, office equipment and LED. According to experiment, the switching power supply can steadily drive 5 LED, the ripple factor of output is 1.33%, the power efficiency is 85.7%.

scholarly journals Solar System Analysis for Different LOADS in Stand-Alone Mode

2021 ◽  
pp. 10-18
Author(s):  
Sanyam Indurkhya ◽  
Shravan Vishwakarma
Keyword(s):  
System Analysis ◽  
Storage System ◽  
Photovoltaic System ◽  
Concept Design ◽  
Small Water ◽  
Distributed Generators ◽  
A Value ◽  
Linear Load ◽  
Non Linear ◽  
Non Linear Load

Distributed generators using environmentally friendly energy sources such as wind, small water and solar energy have become an important part of the future smart grid/micro grid concept. Design of an autonomous photovoltaic system to study the reaction of solar modules to variable irradiation conditions and their effect on loads. The autonomous system must include a battery storage system to handle non-linear load responses on the AC side. And improve the output power of the photovoltaic system using the MPPT algorithm specially designed to drive linear and non-linear loads on stand-alone systems. And causing the system to respond to varying levels of radiation in the environment and achieve an uninterrupted regulated output of the system. The system examined the behavior of linear and non-linear loads with constant irradiation of 1000 wb / m2 and then modified it to a value between 1000 wb / m2 and 200 wb/m2. The harmonic content in the line voltage increased to 3.34% with a non-linear load by 0.54% with a linear load.

scholarly journals An innovative learning approach for solar power forecasting using genetic algorithm and artificial neural network

2020 ◽  
Vol 10 (1) ◽  
pp. 630-641 ◽  
Author(s):  
Debasish Pattanaik ◽  
Sanhita Mishra ◽  
Ganesh Prasad Khuntia ◽  
Ritesh Dash ◽  
Sarat Chandra Swain
Keyword(s):  
Solar Power ◽  
Weather Condition ◽  
Photovoltaic System ◽  
Design Stage ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Time Data ◽  
Pv System ◽  
Simulink Model ◽  
Solar Photovoltaic System

AbstractAnalysing the Output Power of a Solar Photo-voltaic System at the design stage and at the same time predicting the performance of solar PV System under different weather condition is a primary work i.e. to be carried out before any installation. Due to large penetration of solar Photovoltaic system into the traditional grid and increase in the construction of smart grid, now it is required to inject a very clean and economic power into the grid so that grid disturbance can be avoided. The level of solar Power that can be generated by a solar photovoltaic system depends upon the environment in which it is operated and two other important factor like the amount of solar insolation and temperature. As these two factors are intermittent in nature hence forecasting the output of solar photovoltaic system is the most difficult work. In this paper a comparative analysis of different solar photovoltaic forecasting method were presented. A MATLAB Simulink model based on Real time data which were collected from Odisha (20.9517∘N, 85.0985∘E), India. were used in the model for forecasting performance of solar photovoltaic system.

ULTRA-LOW POWER BOOST CONVERTER WITH CONSTANT ON-TIME-BASED MPPT FOR ENERGY HARVESTING APPLICATIONS

2014 ◽  
Vol 23 (02) ◽  
pp. 1450027 ◽  
Author(s):  
MINGYANG CHEN ◽  
MENGLIAN ZHAO ◽  
QING LIU ◽  
LU WANG ◽  
XIAOBO WU
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Power Efficiency ◽  
Input Voltage ◽  
Boost Converter ◽  
Cmos Process ◽  
Ultra Low Power ◽  
Voltage Range ◽  
Point Tracking ◽  
Power Point

An ultra-low power boost converter for energy harvesting applications is introduced in this brief. The idle power dissipation is reduced to 800 nW by using a novel output voltage detector (OVD) which is insensitive to temperature variation and process deviation. Furthermore, a constant on-time (COT)-based hysteretic burst mode controller with maximum power point tracking (MPPT) technique is developed to ensure high power efficiency for a wide input voltage range. After startup, the input voltage can be set as low as 30 mV. The whole system is designed and fabricated in SMIC 0.18 μm CMOS process, the end-to-end power efficiency of this converter can reach 49% at 350 mV input voltage and 65% at 750 mV input voltage.

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