Article
Green & Sustainable Science & Technology
Mariz B. Arias, Sungwoo Bae
Summary: This paper presents a prediction model for calculating solar PV power based on historical data and demonstrates the variability of solar PV power for each day in a summer season. The simulation results show relatively accurate forecasting.
Article
Thermodynamics
Henrik Zsiboracs, Gabor Pinter, Andras Vincze, Nora Hegedusne Baranyai, Martin Janos Mayer
Summary: The study analyzed the accuracy of day-ahead and intraday PV forecasts in seventeen European countries, highlighting significant differences among countries and the potential for improvement through algorithm enhancement or the creation of a uniform system. Intraday forecasts were found to be less accurate than day-ahead forecasts in most countries, emphasizing the need for further research in the intraday horizon. The aggregate regulatory need resulting from discrepancies between forecasted and actual energy amounts in all studied countries indicates a significant requirement for energy storage capacity to address the challenges of increasing PV penetration.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Preeti Kumari Sahu, J. N. Roy, C. Chakraborty
Summary: This study presents a comprehensive performance assessment of a bifacial photovoltaic system and real-time validation of a new energy estimation model. The system consisted of 18 bifacial PV modules with a total capacity of 6.8 kWp. The study evaluated the system's energy yield over one year and validated the energy estimation model using real-time data collected from the system. Results showed that the bifacial PV system achieved an annual energy yield of 1569 kWh/kWp. The energy estimation model demonstrated accuracy and reliability with correlation coefficients of 1.04 and 1.40 for the front and rear sides, respectively. This study provides valuable insights for the design and optimization of PV systems in different environmental conditions.
Article
Engineering, Electrical & Electronic
Miguel Martinez-Lavin, Raquel Villena-Ruiz, Andres Honrubia-Escribano, Jesus C. Hernandez, Emilio Gomez-Lazaro
Summary: This study proposes an innovative simulation model to accelerate the commissioning process of new solar PV power plants and demonstrates its accuracy and usefulness. It has also led to the revision of the Spanish grid code and could serve as a basis for other countries to adopt similar models for integrating PV power into power grids.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Energy & Fuels
Steffen Karalus, Benedikt Koepfer, Philipp Guthke, Sven Killinger, Elke Lorenz
Summary: The self-consumption of energy generated by photovoltaics (PV) is increasingly important in the power grid. A stochastic bottom-up model of PV power generation and local consumption was introduced to analyze the effects of PV self-consumption in the control area of TransnetBW, the German transmission system operator. By setting up a realistic portfolio of over 100,000 PV/prosumer systems, representative time series of PV generation and consumption were generated to derive self-consumption and feed-in. The analysis focused on the variation of self-consumption with PV generation and consumption at the portfolio level as well as its seasonal, weekly, and diurnal cycles. A scenario of 100% prosumers was also studied, considering a situation without subsidized feed-in tariffs and local energy storage.
Article
Thermodynamics
Bingnan Wang, Shan Jiang, Zhan'ao Tan
Summary: This study analyzes the performance of photovoltaic systems under over-irradiation conditions using a mathematical model and experimental data. The results show that the system faces challenges in terms of energy generation, increased operating current, and reliability of fuses.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Article
Energy & Fuels
Calcabrini Andres, Cardose Ruben, Gribnau David, Babal Pavel, Manganiello Patrizio, Zeman Miro, Isabella Olindo
Summary: This article introduces a backward ray tracing simulation approach for calculating the irradiance on photovoltaic systems in geometrically complex scenarios. By storing the results of the most computationally expensive parts of the problem, the repetition of time-consuming simulation steps can be avoided. Experimental validation shows that the irradiance calculated with the proposed approach is in good agreement with the results of a well-established irradiance simulation tool. Furthermore, the proposed approach is well-suited for the simulation of high-resolution spectral irradiance in scenarios with time-varying reflectance properties, particularly for bifacial and tandem photovoltaic modules in complex urban environments.
PROGRESS IN PHOTOVOLTAICS
(2023)
Article
Engineering, Electrical & Electronic
Sebota Mokeke, Leboli Z. Thamae
Summary: The integration of solar photovoltaic and wind energy into the power grid in Lesotho has caused both dynamic and steady state impacts, with simulations revealing that increased penetration of renewable energy resulted in grid instability.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Computer Science, Information Systems
Henrik Zsiboracs, Andras Vincze, Gabor Pinter, Nora Hegedusne Baranyai
Summary: The accuracy of PV power generation forecasts varies greatly among European countries, with Germany and Spain performing better than Estonia and Switzerland. This study provides valuable information for transmission system operators and decision makers, as it determines and presents the accuracy of ENTSO-E countries' PV forecasting activities.
Article
Energy & Fuels
Martin Janos Mayer, Gyula Grof
Summary: Physical modeling plays a crucial role in forecasting the power production of grid-connected PV power plants. Different model chains can lead to significant differences in forecast accuracy, with irradiance separation and transposition modeling identified as the most critical calculation steps. Wind speed forecasts have only a marginal effect on PV power prediction accuracy.
Article
Energy & Fuels
Uchechi Chibuko, Tsvetelina Merdzhanova, Daniel Weigand, Fabian Ezema, Solomon Agbo, Uwe Rau, Oleksandr Astakhov
Summary: A properly chosen PV-battery pair can maintain a high degree of internal power coupling even without MPPT electronics. In this study, a laboratory scale unit of a 7-cell silicon heterojunction PV module directly connected to a lithium-ion battery and variable load was examined. The results showed high coupling efficiencies comparable to modern MPPT devices.
Review
Energy & Fuels
Yousef Alharbi, Ahmed Darwish, Xiandong Ma
Summary: Energy crises and the growth of energy demand have led to an interest in renewable energy sources. Photovoltaic solar energy systems, with their cleanliness and abundance, are a key solution to these issues. However, the unequal power generation caused by partial shading and degradation factors leads to a reduction in capacity. This paper provides a comprehensive analysis of PV grid-connected inverters with a focus on sub-module connection and control, aiming to maximize power generation through the use of distributed maximum power point tracking (DMPPT) approach.
Article
Chemistry, Physical
Abdelkhalek Chellakhi, Said El Beid, Younes Abouelmahjoub
Summary: The purpose of this paper is to improve the performance and tracking efficiency of solar photovoltaic systems. An advanced maximum power point tracking scheme is used to achieve this goal, which significantly improves tracking accuracy and reduces output ripple magnitude. The proposed scheme outperforms the traditional scheme in terms of tracking efficiency and demonstrates robustness in various scenarios.
INTERNATIONAL JOURNAL OF PHOTOENERGY
(2022)
Article
Energy & Fuels
Ruchi Gupta, Alejandro Pena-Bello, Kai Nino Streicher, Cattia Roduner, Yamshid Farhat, David Thoni, Martin Kumar Patel, David Parra
Summary: The study highlights the importance of rapid deployment of solar photovoltaics, electric heat pumps, and electric vehicles for decarbonizing the economy. It also emphasizes the challenges faced by the distribution grid infrastructure in integrating these technologies and the need for grid reinforcement to enable decarbonization strategies. The research findings show the varying impact of PV, HP, and EV on the distribution grid network, with different costs for grid reinforcement depending on the urban setting, and the potential for batteries to defer grid reinforcement costs in specific scenarios.
Article
Energy & Fuels
Frank P. M. Kreuwel, Wouter B. Mol, Jordi Vila-Guerau de Arellano, Chiel C. van Heerwaarden
Summary: The study investigates overvoltage events caused by solar photovoltaic systems and finds that the typical duration is around 5 minutes, with Sundays having a 2.1 times higher occurrence rate compared to weekdays. However, there is no evidence that local, short-term irradiance peaks result in additional events. The research also shows that while the number of overvoltage events is increasing, they are still rare in absolute terms.
