Maximum power tracking for PV generating system using novel optimized fractional order open circuit voltage- FOINC method

2014 ◽  
Author(s):  
Arulmurugan Ramasamy ◽  
N. Suthanthira Vanitha
Keyword(s):  
Fractional Order ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Maximum Power ◽  
Maximum Power Tracking ◽  
Generating System

scholarly journals Comparing Fuzzy rule-based and fractional Open Circuit Voltage MPPT techniques in a fuel cell stack

2019 ◽  
Vol 8 (4) ◽  
pp. 402
Author(s):  
Doudou N. Luta ◽  
Atanda K. Raji
Keyword(s):  
Fuel Cell ◽  
Power Systems ◽  
Output Power ◽  
Open Circuit Voltage ◽  
Fuzzy Rule ◽  
Open Circuit ◽  
Maximum Power ◽  
Rule Based ◽  
Fuel Cell Stack ◽  
Maximum Power Tracking

The concept of power tracking was at first applied to renewable power systems and especially those based on solar and wind to extract as much power as possible from them. Both types of power systems operate on the principle of converting either solar or wind into electricity. Thus, their output power is direct dependent on the solar radiation for solar power systems and on the wind speed for wind generators. To maintain efficient system operations, the output power of these power systems is optimized through maximum power tracking techniques. In the similar vein, fuel cell stacks display nonlinear output powers resulting from internal limitations and operating parameters such as tem-perature, hydrogen and oxygen partial pressures and humidity levels, etc., leading to a reduced system performance. It is critical to extract as much power as possible from the stack, thus, to prevent also an excessive fuel use. To ensure that, the power converter interfaced to the stack must be able to self-adjust its parameters continuously, hence modifying its voltage and current depending upon the maximum power point position. Diverse techniques are utilized to extract maximum power from the fuel-cell stack.  In this paper, a fractional open circuit voltage and fuzzy rule based maximum power tracking techniques are considered and compared. The proposed system consists of a 50 kW Proton Exchange Membrane fuel cell interfaced to a DC-to-DC boost converter. The converter is designed to deliver 1.2 kV from 625 V input voltage. The simulation is carried out under Matlab/Simulink environment.  

The Improvement of Solar Cell Output Power Using Cooling and Reflection from Mirror

2017 ◽  
Vol 8 (3) ◽  
pp. 1320
Author(s):  
Budiyanto Budiyanto ◽  
Fadliondi Fadliondi
Keyword(s):  
Experimental Investigation ◽  
Solar Cell ◽  
Output Power ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Maximum Power ◽  
Light Reflection

This paper explains the experimental investigation to improve the output power of solar cell using cooling and light reflection from mirrors. The results show that by adding mirror, the current and output power of solar cell increase but the open circuit voltage and maximum power voltage decrease due to heat. By adding cooling, the open circuit voltage and the maximum power voltage are improved, so the output power also increases.

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 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 Design of Efficient Off-Grid Solar Photovoltaic Water Pumping System Based on Improved Fractional Open Circuit Voltage MPPT Technique

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Ali Hmidet ◽  
Umashankar Subramaniam ◽  
Rajvikram Madurai Elavarasan ◽  
Kannadasan Raju ◽  
Matias Diaz ◽  
...  
Keyword(s):  
Rural Areas ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Operating Conditions ◽  
Maximum Power ◽  
Solar Photovoltaic ◽  
Pump System ◽  
Pumping System ◽  
Water Pumping ◽  
Three Phase

The main application of off-grid solar photovoltaic (SPV) systems is water extraction in rural areas where access to the grid is restricted. In this application, photovoltaic (PV) and pump system regulation are crucial to increase its overall efficiency. In this context, this work presents a simple and efficient off-grid SPV water pumping system (SPVWPS). The designed system is based on a DC-DC boost converter, a three-phase DC-AC inverter, and a three-phase induction motor (IM) coupled to the centrifugal pump. The proposed solution is operated using a control strategy that associates an improved fractional open-circuit voltage (FOCV) method for maximum power point tracking (MPPT) and closed-loop scalar control. This association avoids the use of a speed sensor/encoder and a current sensor for the IM. Finally, the effectiveness of the proposed off-grid SPVWPS and its control system for both steady-state and dynamic conditions of insolation change is verified using a 1KVA rated prototype. The relevance of the drive is also checked in various operating conditions and is found to be adequate for pumping water. Moreover, the proposed method guarantees a fast response, less oscillations around the MPP, a system efficiency of 99%, and a high flow rate due to the extraction of maximum power.

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