Improved P&O MPPT algorithm with efficient open-circuit voltage estimation for two-stage grid-integrated PV system under realistic solar radiation

2022 ◽  
Vol 137 ◽  
pp. 107805
Author(s):  
Ahmed Ismail M. Ali ◽  
Hassanien Ramadan A. Mohamed
Keyword(s):  
Solar Radiation ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Pv System ◽  
Two Stage

scholarly journals Improved Fractional Open Circuit Voltage MPPT Methods for PV Systems

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 321 ◽  
Author(s):  
Dmitry Baimel ◽  
Saad Tapuchi ◽  
Yoash Levron ◽  
Juri Belikov
Keyword(s):  
Open Circuit Voltage ◽  
Open Circuit ◽  
Maximum Power ◽  
Pv System ◽  
Maximum Power Point ◽  
Pv Systems ◽  
Point Tracking ◽  
Pv Panel ◽  
Power Point Tracking ◽  
Power Point

This paper proposes two new Maximum Power Point Tracking (MPPT) methods which improve the conventional Fractional Open Circuit Voltage (FOCV) method. The main novelty is a switched semi-pilot cell that is used for measuring the open-circuit voltage. In the first method this voltage is measured on the semi-pilot cell located at the edge of PV panel. During the measurement the semi-pilot cell is disconnected from the panel by a pair of transistors, and bypassed by a diode. In the second Semi-Pilot Panel method the open circuit voltage is measured on a pilot panel in a large PV system. The proposed methods are validated using simulations and experiments. It is shown that both methods can accurately estimate the maximum power point voltage, and hence improve the system efficiency.

scholarly journals Investigation of the energy efficiency of horizontally mounted solar module soiled with CaCo3

2017 ◽  
Vol 15 (2) ◽  
pp. 57-69 ◽  
Author(s):  
Ivana Radonjic ◽  
Tomislav Pavlovic
Keyword(s):  
Energy Efficiency ◽  
Calcium Carbonate ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Pv System ◽  
Solar Module ◽  
The Impact

Soiling is a term used to describe the deposition of dust (dirt) on solar modules, which reduces the amount of solar radiation reaching the solar cells. Deposition of dust on solar modules can make the operation of the entire PV system - more difficult and, therefore, lead to the generation of less electric energy. Soiling of solar modules also influences solar modules parameters (short-circuit current, open-circuit voltage, maximum power, fill factor and efficiency). This paper presents the results of the investigation on the impact different quantities of calcium carbonate (CaCO3) deposition have on the energy efficiency of horizontally mounted solar modules. The short-circuit current, power and efficiency decrease with increasing the mass of CaCO3 deposited on the horizontally mounted solar module. The open-circuit voltage and fill factor very slightly increase with increasing the mass of CaCO3 deposited on the horizontally mounted solar module. Upon soiling with 1 g of calcium carbonate, the solar module efficiency decreased by 4.6% in relation to the clean solar module, upon soiling with 2 g of calcium carbonate it decreased by 6.0%, and upon soiling with 3 g of calcium carbonate it decreased by 12.9% in relation to the clean solar module. It can be concluded that the power and energy efficiency of the solar module decrease due to the increased amount of calcium carbonate.

scholarly journals An Advanced MPPT Scheme for Standalone Solar powered PV System using Neuro-Fuzzy Estimator based on measured data

2021 ◽  
Author(s):  
Ferdaws Ben Naceur ◽  
◽  
Abdelaziz Salah Saidi ◽  
Javed Khan Bhutto ◽  
Mohamed Ali Mahjoub ◽  
...  
Keyword(s):  
Open Circuit Voltage ◽  
Open Circuit ◽  
Maximum Power ◽  
Weather Data ◽  
Pv System ◽  
Photovoltaic Panel ◽  
Point Tracking ◽  
Neuro Fuzzy ◽  
Solar Powered ◽  
Power Point

This paper deals with the problem of the optimization of the power, delivered by the photovoltaic panel (PVP). To achieve this aim, a neuro-fuzzy estimator (NFE), followed by a conversion coefficient and a calculation stage of the optimal duty cycle, has been developed. The NFE is used to calculate the open circuit voltage corresponding to each solar radiation, based only on the standard open circuit voltage. A coefficient, determining for each climatic condition the voltage of the maximum power directly from the open circuit voltage, is estimated by a measured test. Finally, the optimal duty cycles, next, determined by the input/output equation of boost converter. The system performance, under different scenarios, has been checked carrying out MATLAB simulations, using an existing photovoltaic model and real weather data, and comparing the simulation results with the measured one. The results demonstrate the effectiveness of the present approach. The efficiency of the proposal maximum power point tracking (MPPT) is proved and it showed that this controller can generate almost 99% of the real PVP maximum power.

scholarly journals The Transition to Renewable Energy for A Green Shoot of Economic Revival: Comparative Study of Four MPPT Control Algorithms for A PV System

2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Hedi Trabelsi ◽  
Younes Boujelbene
Keyword(s):  
Renewable Energy ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Control Algorithms ◽  
Pv System ◽  
Perturb And Observe ◽  
Simulation Results

This paper explains the need for renewable energies for “green revival” of the economy. First, we will analyze the overall context of the double crisis. Then we will focus on “green recovery” as a solution for these two crises. Finally, we will study the example of the photovoltaic system as a source of renewable energy by presenting and comparing four types of MPPT commands such as: Perturb and Observe, Incremental Conductance, Fractional Open-Circuit Voltage (FOV) and Fractional Short-Circuit Current (FCC). The Matlab-Simulink environment will be used to analyze and interpret the simulation results of these algorithms and therefore we show the performance and limits of each algorithm.

Application of nano-PCMs in solar Photovoltaic

2020 ◽  
pp. 47-58
Author(s):  
Shubham Srivastava ◽  
Deepak ◽  
CS Malvi
Keyword(s):  
Transfer Rate ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Storage Medium ◽  
Pv System ◽  
Cooling Systems ◽  
Pv Panel ◽  
Solar Pv System

Although the good intensity of solar radiation is desirable for a solar PV system, but the power output drops with a rise in its temperature. The open-circuit voltage of PV panel decreases with increase in its temperature, thus lowering the PV effect. Many studies have been carried out by the researcher to tackle this problem, proposing modification in conventional PV system design and utilizing water, air, PCM, and oil as a cooling medium in various cooling systems. Although PCM has fascinating characteristics as a thermal energy storage medium in the solar system, but low thermal conductivity became a barrier in energy conversion. Few studies suggested the use of nanoparticles in PCM to increase its heat transfer rate but very few studies were focused on nano PCM incorporated solar PV system. This paper summarized the researches done so far on nano PCM solar PV system by delineating the methods, and materials involved.

Hybrid Photovoltaic-Piezoelectric Flexible Device for Energy Harvesting from Nature

2012 ◽  
Vol 77 ◽  
pp. 297-301 ◽  
Author(s):  
D. Vatansever ◽  
R.L. Hadimani ◽  
Tahir Shah ◽  
E. Siores
Keyword(s):  
Wind Speed ◽  
Solar Radiation ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Hybrid Structure ◽  
Open Circuit ◽  
Solar Simulator ◽  
Variable Resistor ◽  
Turbulent Wind

Photovoltaic energy can be expensive if the solar radiation in a particular region is not abundant. When the solar radiation is scarce in a region, there is presence of winds and rainfall. If flexible solar cells are coupled with flexible piezoelectric films then the hybrid structure can generate energy from solar radiation, wind and rainfall. Hybrid piezoelectric-photovoltaic devices have been developed which are capable of generating electricity from solar as well as wind and rain energy. This work focuses on non-transparent hybrid structure which contains copper and aluminium electrodes and eliminates the used of costly indium tin oxide (ITO).These hybrid films are made by depositing organic photovoltaic cell based on P3HT and PCBM on a commercial PVDF film. The hybrid piezoelectric-photovoltaic film was first tested under a solar simulator with 1.5 AM filter at one sun solar intensity. The film produced an open circuit voltage, Voc of 0.43V and a short circuit current density, Isc of 4.48mA/cm2. It was then subjected to a turbulent wind speed of 10m/sec (36km/hour) in a custom built wind tunnel. A peak voltage of 52V was generated by the PVDF substrate due to the oscillations created by the wind. Peak power was also measured using a variable resistor and was recorded to be 85 µW. In order to check if the film was not damaged when it was subjected to the turbulent wind speed, the film was again tested under the solar simulator and did not show any changes in its open circuit voltage or short circuit current.

scholarly journals Development of an Automated Biaxial Solar Photovoltaic Tracking System

2006 ◽  
Vol 3 (2) ◽  
pp. 1
Author(s):  
Ahmad Maliki Omar ◽  
Muhamad Rizuan Yahir ◽  
Sulaiman Shaari ◽  
Abdul Rahman Omar
Keyword(s):  
Power Output ◽  
Solar Irradiance ◽  
Open Circuit Voltage ◽  
Tracking System ◽  
Electrical Power ◽  
Open Circuit ◽  
Maximum Output ◽  
Solar Photovoltaic ◽  
Pv System ◽  
Solar Altitude

This paper presents and describes a prototype product code-named SolT2A which is a system that tracks the position of the sun automatically across the celestial vault in two axes. This kind of system is typically used in a solar photovoltaic (PV) system in terrestrial applications to provide electrical power. It is designed and fabricated due to Malaysia’s location near the equator, thus the solar altitude crosses the zenith and the azimuth reverses direction during the year. Thus the use of a static PV system is not maximised during half of the year. This situation can be addressed by using a two-axes solar tracking system. So far, Malaysia has not implemented such power-tracking systems. Thus SolT2A has been designed and fabricated to address the problem by using a combination of electro-mechanical devices with an element of programming ingenuity and intelligence. Basically SolT2A measures solar irradiance at four points and makes comparisons in terms of the intensity received. These data are then analysed and processed by a controller before being sent to a DC motor that ensures the maximum amount of solar irradiance received on the PV panels all the time. Thus SolT2A is a system that maximises the power output of the PV panels to obtain the highest power output continuously. Based on field data, the maximum output open circuit voltage produced by the SolT2A tracking system and that with a static PV system is as much as 82 %. The overall increase in open circuit voltage production is between 15 to 20 % daily. With the technical know-how and proven prototype, Malaysia can look into joining the small and limited but niche pool of expertise in this area. This will not only give immediate socio-economic impact to the population, but will give an upgrade to Malaysia as a country with expertise in the area. This concept could also be applied to defence systems. With further testing and improvement, SolT2A system can be further upgraded to reach a commercial stage. This will definitely be of commercial interest to the country.

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