Integrated photovoltaic maximum power point tracking converter (original) (raw)
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International Journal of Electrical and Computer Engineering (IJECE)
This paper presents an integrated power control system for photovoltaic systems based on maximum power point tracking (MPPT). The architecture presented in this paper is designed to extract more power from photovoltaic panels under different partial obscuring conditions. To control the MPPT block, the integrated system used the ripple correlation control algorithm (RCC), as well as a high-efficiency synchronous direct current (DC-DC) boost power converter. Using 180 nm complementary metal-oxide-semiconductor (CMOS) technology, the proposed MPPT was designed, simulated, and layout in virtuoso cadence. The system is attached to a two-cell in series that generates a 5.2 V average output voltage, 656.6 mA average output current, and power efficiency of 95%. The final design occupies only 1.68 mm2.
2014 17th International Conference on Computer and Information Technology (ICCIT), 2014
ABSTRACT Photovoltaic modules show nonlinear output characteristics because of which different system loss occurs. Maximum power point tracking (MPPT) is an intelligent technique for reducing these losses by driving the system at its optimal operating point. In this paper two well established MPPT techniques: Perturb and Observe (P&O) method and Incremental conductance (INC) method is explained and verified with simulated results. Due to some drawbacks in P&O method, a comprehensive optimized photovoltaic system is designed implementing the INC method in Matlab/Simulink. DC/DC converter is an essential part of a MPPT controlled photovoltaic (PV) system which functions as an interface between PV system and load. There are many converter topologies whose are implemented according to their required applications. A detailed comparative study among buck, boost and buck-boost converters is presented here. Our study shows that among these three converters buck-boost delivers the maximum power to the load. Finally an optimized PV system implementing INC method interfaced with buck-boost converter is designed and simulated which is robust and compatible to all other techniques.
International journal of engineering research and technology, 2018
With the increasing in the energy demand conservation and utilization of energy are very essential. Hence Solar charge controller helps in increasing the efficiency of the solar power transferred to the battery. Photovoltaic modules show nonlinear output characteristics because of different system losses. Maximum power point tracking (MPPT) is an intelligent technique for reducing these losses by driving the system at its maximum operating point. DC/DC converter is an essential part of a MPPT controlled photovoltaic (PV) system which functions as an interface between PV system and the load. These Converters are mostly Dc Choppers which converts fixed Dc voltage to a variable Dc source. These Regulators are used in case of Solar Charge Controllers to increase or decrease the PV panel voltage to as that required by Battery. The DC voltage from the PV panel varies with the light intensity which depends on time of day and temperature. Similarly, on the Battery side the voltage varies depending on the load connections. Thus, for optimal charging of battery it is important that the voltage of the PV panel and the current matches the battery charging state at any instant. There are various types of Dc-Dc Converter of which Buck Boost Converter is taken into consideration. In this project work we propose an efficient photovoltaic system which will be designed, developed and the results will be validated in real time.
Maximum power point tracking for low power photovoltaic solar panels
1994
A maximum power point tracker unit is developed for the optimum coupling of a photovoltaic panel (PVP) to the batteries and load through a controlled dcdc converter (chopper). The system consists of three main units; (i) the photovoltaic panels that converts solar power to electricity, (ii) a chopper which couples the power of PVP to the load or batteries a t a constant voltage, and (E) maximum power point (MPP) computing unit that determines the set point of the chopper to keep the panel voltage a t maximum power transfer (MPT) condition.
International Journal of Engineering Research and Technology (IJERT), 2018
https://www.ijert.org/design-and-development-of-an-efficient-photovoltaic-system-with-maximum-power-point-tracking-technique https://www.ijert.org/research/design-and-development-of-an-efficient-photovoltaic-system-with-maximum-power-point-tracking-technique-IJERTCONV6IS13085.pdf With the increasing in the energy demand conservation and utilization of energy are very essential. Hence Solar charge controller helps in increasing the efficiency of the solar power transferred to the battery. Photovoltaic modules show nonlinear output characteristics because of different system losses. Maximum power point tracking (MPPT) is an intelligent technique for reducing these losses by driving the system at its maximum operating point. DC/DC converter is an essential part of a MPPT controlled photovoltaic (PV) system which functions as an interface between PV system and the load. These Converters are mostly Dc Choppers which converts fixed Dc voltage to a variable Dc source. These Regulators are used in case of Solar Charge Controllers to increase or decrease the PV panel voltage to as that required by Battery. The DC voltage from the PV panel varies with the light intensity which depends on time of day and temperature. Similarly, on the Battery side the voltage varies depending on the load connections. Thus, for optimal charging of battery it is important that the voltage of the PV panel and the current matches the battery charging state at any instant. There are various types of Dc-Dc Converter of which Buck Boost Converter is taken into consideration. In this project work we propose an efficient photovoltaic system which will be designed, developed and the results will be validated in real time.
Study of Simple MPPT Converter Topologies for Grid Integration of Photovoltaic Systems
Scientific Journal of Riga Technical University. Power and Electrical Engineering, 2011
Study of Simple MPPT Converter Topologies for Grid Integration of Photovoltaic SystemsThis paper presents a study of two simple MPPT converter topologies for grid integration of photovoltaic (PV) systems. A general description and a steady state analysis of the discussed converters are presented. Main operating modes of the converters are explained. Calculations of main circuit element parameters are provided.Experimental setups of the MPPT converters with the power of 800 W were developed and verified by means of main operation waveforms. Also, experimental and theoretical boost properties of the studied topologies are compared.Finally, the integration possibilities of the presented MPPT converters with a grid side inverter are discussed and verified by simulations.
WSEAS Trans. Power Syst, 2010
This paper presents an efficient maximum power point tracking (MPPT) controller for a standalone photovoltaic (PV) generation system. To achieve an efficient MPPT controller, a new boost converter design and an improved MPPT algorithm are incorporated. In the proposed boost converter design, a passive regenerative snubber circuit is included to absorb the energy of stray inductance so as to reduce the IGBT switching losses. As for the improved MPPT algorithm, it is based on the curve fitting method which attempts to predict the power-voltage characteristic curve by a fourth order polynomial function. The predicted P-V curve strongly depends on the cell temperature and therefore the ambient temperature and solar radiation are used to track the maximum power point (MPP) of the PV module. Experimental results are given to verify the validity and performance of the MPPT algorithm which is embedded in a prototype MPPT controller. The experimental results showed that the proposed MPPT controller successfully tracked the MPP by giving an average tracking efficiency of 89.2%
Study of Simple MPPT Converter Topologies for Grid Integration of Photovoltaic Systems (Digest)
conference.rtu.lv
This paper presents a study of two simple MPPT converter topologies for grid integration of photovoltaic (PV) systems. A general description and a steady state analysis of the discussed converters are presented. Main operating modes of the converters are explained. Calculations of main circuit element parameters are provided. Experimental setups of the MPPT converters with the power of 800 W were developed and verified by means of main operation waveforms. Also, experimental and theoretical boost properties of the studied topologies are compared. Finally, the integration possibilities of the presented MPPT converters with a grid side inverter are discussed and verified by simulations.
Due to the ever increase in the price of Grid Electricity, many countries are switching to Renewable sources. Energy from Sun in the form of Solar, Wind and Biomass Energy can be used by any electricity consumer. With the Net Metering approved by the Ceylon Electricity Board in Sri Lanka, Domestic consumers and all Commercial consumers will benefit by installing such renewable energy systems connected to the grid through an interface which will maximize the energy from these installed through a SMART system. This undergraduate research project the University of Ruhunu SriLanka describes the design, assembling and testing of such a system. The fetching the optimal energy is based on Maximum Power Point Tracking concept and the project was implemented for Solar PV power generation. Mainly the system was implemented based on power electronic theories.The Following parameters were considered at a particular time period. The Module Voltage, SunIrradiation and the ambient temperature. An algorithm was prepared to adjust the output current to fetch maximum power. The battery could be charged by the renewable sources and due to the environment changes the reliability of the output can be changed, therefore it is connected to the inverter through a power management system when renewable power source is not providing energy and if the battery is discharged then the system will shift to the redundant power supply. The system was tested and the results of them, the average efficiencies of the solar power generation system with and without maximum power point tracker were around 71.4% and 92.9% respectively.The system component ratings and electronic design depend upon the ratings of the input sources.The system that was implemented is a panel with the ratings of maximum power 120W and the optimum operating voltage and current and 17.2V and 6.98A respectively. This system cost was about Rs.18000 ($145) with component costs in Sri Lanka
Influence of power converters on PV maximum power point tracking efficiency
2012 10th IEEE/IAS International Conference on Industry Applications, 2012
Photovoltaic maximum power point tracker (MPPT) systems are commonly employed to maximize the photovoltaic output power, since it is strongly affected in accordance to the incident solar radiation, surface temperature and load-type changes. Basically, a MPPT system consists on a dc-dc converter (hardware) controlled by a tracking algorithm (software) and the combination of both, hardware and software, defines the tracking efficiency. This paper shows that even when the most accurate algorithm is employed, the maximum power point cannot be found, since its imposition as operation point depends on the dc-dc converter static feature and the load-type connected to the system output. For validating the concept, the main dc-dc converters, i.e., Boost, Buck-Boost, Cuk, SEPIC and Zeta are analyzed considering two load-types: resistive voltage regulated dc bus. Simulation and experimental results are included for validating the theoretical analysis. I.