Investigation of Photovoltaic Grid System under Non-Uniform Irradiance Conditions

This paper aims to improve the performance of the conventional perturb and observe (P&O) maximum power point tracking (MPPT) algorithm. As the oscillation around the maximum power point (MPP) is the main disadvantage of this technique, we introduce a modified P&O algorithm to conquer this handicap. The new algorithm recognizes approaching the peak of the photovoltaic (PV) array power curve and prevents the oscillation around the MPP. The key to achieve this goal is testing the change of output power in each cycle and comparing it with the change in array terminal power of the previous cycle. If a decrease in array terminal power is observed after an increase in the previous cycle or in the opposite direction, an increase in array terminal power is observed after a decrease in the previous cycle; it means we are at the peak of the power curve, so the duty cycle of the boost converter should remain the same as the previous cycle. Besides, an optimized duty cycle is introduced, which is adjusted based on the operating point of PV array. Furthermore, a DC-DC boost converter powered by a PV array simulator is used to test the proposed concept.When the irradiance changes, the proposed algorithm produces an average η MPPT of nearly 3.1% greater than that of the conventional P&O algorithm and the incremental conductance (InC) algorithm. In addition, under strong partial shading conditions and drift avoidance tests, the proposed algorithm produces an average η MPPT of nearly 9% and 8% greater than that of the conventional algorithms, respectively.

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“…Substituting ( 18) in ( 16) results in S ̇< 0, thus we can obtain (20). Overall, the PV system is globally stable.…”

Section: B Proposed Pando Algorithmmentioning

confidence: 93%

An Improved Perturb and Observed Maximum Power Point Tracking Algorithm for Photovoltaic Power Systems

Kahani¹,

Jamil²,

Iqbal³

2023

Journal of Modern Power Systems and Clean Energy

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“…Developed in 1993, this algorithm aimed to address limitations observed in the PO (perturbation and observation) algorithm. INC (Incremental conductance) aims to extend monitoring periods and enhance energy production, especially in expansive environments where irradiation levels fluctuate [38]. The system calculates the power and conductance of the PV by analyzing its output voltage and current.…”

Section: Maximum Power Point Track Controlmentioning

confidence: 99%

Dynamic Simulation and Optimization of Off-Grid Hybrid Power Systems for Sustainable Rural Development

Khalid,

Awais,

Jamil

et al. 2024

Electronics

Self Cite

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This paper analyzes dynamic modeling for rural HPS to address GHG emissions’ environmental impact on floods and climate change. The aim is to integrate renewable energy sources, such as solar energy, with traditional generators to mitigate emissions and enhance energy access in rural communities in Pakistan. The system is designed using a DC-DC converter, MPPT, LCL filter, and a DC-AC inverter. Utilizing software tools like PVsyst 7.4 and HOMER Pro-3.18.1, the study evaluates system sizing, energy consumption patterns, and optimization strategies tailored to site-specific data. The expected results include a reliable, environmentally friendly hybrid power system capable of providing consistent electricity to rural areas. The analysis of a connected load of 137.48 kWh/d and a peak load of 33.54 kW demonstrates the system’s promise for reliable electricity with minimal environmental impact. The estimated capital cost of USD 102,310 and energy generation at USD 0.158 per unit underscores economic feasibility. Dynamic modeling and validation using HIL examine the system’s behavior in response to variations in solar irradiance and temperature, offering insights into operational efficiency and reliability. The study concludes that the hybrid power system is scalable for rural energy access, which is a practical solution achieving a 100% renewable energy fraction, significantly contributing to emission reduction and promoting sustainable energy practices.

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“…Recent research endeavors have particularly focused on comprehending the intricate dynamics among solar irradiance, temperature variations, and grid-connected PV systems (Chumpolrat et al, 2014;Madhukumar et al, 2020). Solar irradiance and temperature fluctuations, inherent to outdoor environments, can significantly impact the performance and efficiency of PV systems (Bhavani et al, 2021;Younas et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Solar Irradiance and Temperature on The Pll-Synchronized Inverter Within Grid-Connected PV Systems

Sisa,

Ali,

Ahmed

2024

dujopas

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This study assesses the influence of solar irradiance and temperature on αβPLL synchronized inverters by investigating their intricate relationship within grid-connected PV systems. The intermittent nature of the DC side of these systems can significantly impact their performance. However, the extent of this impact remains uncertain when employing the stationary reference frame PLL (αβPLL) algorithm for synchronization with the utility grid. Employing simulation in MATLAB 2020a and a Model Based Design approach in the Simscape toolbox of SIMULINK, we conducted this investigation through two test scenarios: one with constant solar irradiance and varying temperature, and the other with varying solar irradiance and constant temperature. Our results indicate that fluctuations in solar irradiance and temperature have minimal effects on the output parameters of grid-connected PV systems when synchronized with the stationary reference frame PLL (αβPLL) algorithm. This conclusion is supported by the total harmonic distortion values, which all fall within the specified limits of IEEE Standard 929- 2000. These findings underscore the potential of αßPLL synchronization as a promising technique, capable of effectively synchronizing grid inverters even in the presence of DC input distortion. This proficiency in grid integration holds promise for enhancing the integration of renewable energy sources into the grid, thereby bolstering power availability for household distribution.

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Investigation of Photovoltaic Grid System under Non-Uniform Irradiance Conditions

Cited by 7 publications

References 18 publications

An Improved Perturb and Observed Maximum Power Point Tracking Algorithm for Photovoltaic Power Systems

An Improved Perturb and Observed Maximum Power Point Tracking Algorithm for Photovoltaic Power Systems

Dynamic Simulation and Optimization of Off-Grid Hybrid Power Systems for Sustainable Rural Development

The Influence of Solar Irradiance and Temperature on The Pll-Synchronized Inverter Within Grid-Connected PV Systems

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