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[IEEE 2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER) - Monte-Carlo, Monaco (2019.5.8-2019.5.10)] 2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER) - Modelling and Optimal Sizing of Photovoltaic Water Pumping Systems – Sensitivity Analysis
摘要： Recently we have developed a model of photovoltaic water pumping systems (PVWPS) for domestic water access in poor rural areas. In this article, we perform a sensitivity analysis over the 14 parameters of this model. We study how the variation of the parameters value influences the model output and the optimal sizing obtained from the model, for both the dry and the wet season. Results indicate that the peak power of the photovoltaic modules, the efficiency of the motor-pump and the tank volume have the highest impact on the model output. Besides, the parameters which significantly influence the optimal sizing are the position of the water entry in the tank, the position of the stop level of the float switch, the distance between the stop and restart levels of the float switch, the height between the floor and the bottom of the tank, and the static water level in the borehole. Finally, the thermal parameters of the PV modules and the hydraulic losses have a small impact on the model output and on the optimal sizing. This study can be useful to companies, governments and non-governmental organizations which install PVWPS for domestic water access. It can help them to determine the accuracy at which a given parameter has to be known to correctly model or size these systems. It can also allow them to evaluate the robustness of PVWPS sizing to parameters variation with time. Finally, it may guide the choice of components made by PVWPS installers.
关键词： Photovoltaic system,Water Pumping,Seasonality,Optimization,Sensitivity analysis
更新于2025-09-11 14:15:04
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High efficient photovoltaics in BaTiO<sub>3</sub> thin film
摘要： BaTiO3 thin film was grown on a n-type silicon (100) single crystal substrate by high vacuum magnetron sputtering. The samples were annealed under vacuum conditions at 400, 500 and 600°C, respectively. The photovoltaic effect in BaTiO3 thin film was observed, and a high power conversion efficiency of 1.25% was achieved. In addition, the short circuit current density of 134μA/cm2 under white light illumination was obtained in the BaTiO3 thin film. Besides, the current ratio of light ON/OFF state is about 100 at 2v bias. Our experiments suggest that BaTiO3 thin film possesses the potential photovoltaic application in future.
关键词： photovoltaic effect,BaTiO3 thin film,power conversion efficiency
更新于2025-09-11 14:15:04
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[IEEE 2019 International Conference on Clean Electrical Power (ICCEP) - Otranto, Italy (2019.7.2-2019.7.4)] 2019 International Conference on Clean Electrical Power (ICCEP) - Application of Dust Mitigation Strategies to Single-Axis-Tracking Photovoltaic Modules in the Semi-Arid Areas of South Africa
摘要： This paper provides field generated data for single-axis-tracker (SAT) photo voltaic (PV) modules subjected to the semi-arid Northern Cape environment of South Africa. The research objectives are the investigation of the effects of dust soiling on PV module performance and the application of experimental dust mitigation methods. This includes the use of a hydrophobic anti-soiling coating and also the execution of a self-cleaning manoeuvre by the SAT systems. Two SAT systems were deployed to serve as experimental platform, from which data was obtained for a three month period (97 days). Raw data validation is established with comprehensive weather monitoring (ambient temperature, wind speed, wind direction, rainfall, pressure, and humidity), irradiance and PV module back sheet temperatures recorded, in accordance with the IEC61724 standard. An intelligent device was used to extract Current-Voltage (I-V) curves from individual PV modules. Maximum PV module power output is derived from the measured I-V curves, validated with a single-diode curve fitting routine. The comparative study between the different PV modules is done with a performance ratio (PR), defined as the temperature and irradiance corrected performance factor of a PV module. Contrary to the initial hypothesis, results indicated that the hydrophobic coating actually promoted dust soiling. The applied self-cleaning capability of the SAT system did not yield any conclusive results as a dust mitigation method. Finally, interesting in-field observations are discussed.
关键词： photovoltaic modules,self-cleaning,hydrophobic coating,performance ratio,dust soiling
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Chengdu, China (2019.5.21-2019.5.24)] 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Development of Incentive Model for Photovoltaic Generators to Participate in a Day-ahead Electricity Market in South Korea
摘要： This paper presents the incentive model when Photovoltaic (PV) generator participates in a day-ahead market in South Korea. For this, the current supporting policy for PV generation and rules of a day-ahead market are analyzed. Because of the lack of the incentive model for PV supplier in a day-ahead market, Independent System Operation (ISO) can’t consider PV generation when they plan the short-term supply of the system. Therefore, the proposed incentive model is developed to provide the additional profit to encourage PV supplier to participate in the market based on the accuracy of PV generation bidding. To verify incentive model, the actual data including PV generation, System Marginal Price (SMP) and Renewable Energy Certificate (REC) price are used.
关键词： Day-ahead Electricity Market,Photovoltaic (PV),Energy Storage System (ESS),Incentive Model
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America) - Gramado, Brazil (2019.9.15-2019.9.18)] 2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America) - An Adaptive Perturb and Observe Method with Clustering for Photovoltaic Module with Smart Bypass Diode under Partial Shading
摘要： The photovoltaic maximum power point tracking using perturb and observe method has a fixed step size, where a small step size has a slower time response and more accurate steady-state, while a large step size is the opposite. This work proposes an adaptive step size, proportional to the difference between actual and previous power sample, providing a fast time response and reducing the oscillations at steady-state. The oscillations are smaller with adaptive step size, but they are not annulled and the method presents loss by power oscillations. The clustering is used to eliminate this loss, setting the result of the simple average of the last five voltage samples. The enhanced method has been tested on a 72-cell photovoltaic module with a smart bypass diode per cell under partial shading. Modeling and simulation have been implemented using MATLAB/Simulink. The proposal obtained a faster time response and elimination of oscillations at steady-state.
关键词： Smart Bypass Diode,Adaptive Perturb and Observe with Clustering,Maximum Power Point Tracking,Photovoltaic Solar Module,Partial Shading
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America) - Gramado, Brazil (2019.9.15-2019.9.18)] 2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America) - A MISO Nonlinear Model of Photovoltaic Panel Based on System Identification
摘要： The growth in the use of renewable energy sources has made photovoltaic (PV) systems increasingly popular. PV systems are mostly composed of a PV panel to generate dc power and an inverter to convert dc to ac power. Many events may occur on the PV modules, resulting in possible faults and loss of generated power, due to their exposure to environmental conditions. Thus, modeling the PV panel allows to determine the estimation of the output power of the PV system. In this context, this paper presents a nonlinear model based on the black-box modeling of System Identi?cation. In addition, Hammerstein-Wiener (HW) model structure was selected due to its simplicity of representing the nonlinearity of the PV panel. The irradiance and temperature on the PV panel represent the input signals for the proposed model. The current and voltage are measured to calculate the output power, resulting in a Multi Input Single Output (MISO) model. The proposed HW model is compared with the classical Single Diode Model and the results show that the proposed model is more accurate.
关键词： Hammerstein-Wiener,black-box modelling,System Identi?cation,Photovoltaic Systems
更新于2025-09-11 14:15:04
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[IEEE 2019 International Conference on Smart Energy Systems and Technologies (SEST) - Porto, Portugal (2019.9.9-2019.9.11)] 2019 International Conference on Smart Energy Systems and Technologies (SEST) - Machine Learning Algorithms in Forecasting of Photovoltaic Power Generation
摘要： Due to the intrinsic intermittency and stochastic nature of solar power, accurate forecasting of the photovoltaic (PV) generation is crucial for the operation and planning of PV-intensive power systems. Several PV forecasting methods based on machine learning algorithms have recently emerged, but a complete assessment of their performance on a common framework is still missing from the literature. In this paper, a comprehensive comparative analysis is performed, evaluating ten recent neural networks and intelligent algorithms of the literature in short-term PV forecasting. All methods are properly fine-tuned and assessed on a one-year dataset of a 406 MWp PV plant in the UK. Furthermore, a new hybrid prediction strategy is proposed and evaluated, derived as an aggregation of the most well-performing forecasting models. Simulation results in MATLAB show that the season of the year affects the accuracy of all methods, the proposed hybrid one performing most favorably overall.
关键词： intelligent algorithms,photovoltaic,machine learning,Forecasting,neural networks
更新于2025-09-11 14:15:04
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Hybrid Photovoltaic-Thermoelectric Generator Powered Synchronous Reluctance Motor for Pumping Applications
摘要： The interest in photovoltaic (PV) pumping systems has increased, particularly in rural areas where there is no grid supply available. However, both the performance and the cost of the whole system are still an obstacle for a wide spread of this technology. In this article, a hybrid photovoltaic (PV)-thermoelectric generator (TEG) is investigated for pumping applications. The electric drivetrain comprises a synchronous reluctance motor and an inverter. A control strategy for the drivetrain is employed to execute two main tasks: 1) driving the motor properly to achieve a maximum torque per Ampère condition and 2) maximizing the output power of the PV system at different weather conditions. This means that the conventional DC-DC converter is not used in the proposed system. Moreover, batteries, which are characterized by short life expectancy and high replacement cost, are also not used. It is found that the motor output power and the pump flow rate are increased by about 9.5% and 12% respectively when the hybrid PV-TEG array is used compared to only using PV array. Accordingly, the performance, cost and complexity of the system are improved. Measurements on an experimental laboratory setup are constructed to validate the theoretical results of this work.
关键词： Photovoltaic pumping system,thermoelectric generator,MPPT,motor drives,synchronous reluctance machines
更新于2025-09-11 14:15:04
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Application of Supply-Demand-Based Optimization for Parameter Extraction of Solar Photovoltaic Models
摘要： Modeling solar photovoltaic (PV) systems accurately is based on optimal values of unknown model parameters of PV cells and modules. In recent years, the use of metaheuristics for parameter extraction of PV models gains more and more attentions thanks to their efficacy in solving highly nonlinear multimodal optimization problems. This work addresses a novel application of supply-demand-based optimization (SDO) to extract accurate and reliable parameters for PV models. SDO is a very young and efficient metaheuristic inspired by the supply and demand mechanism in economics. Its exploration and exploitation are balanced well by incorporating different dynamic modes of the cobweb model organically. To validate the feasibility and effectiveness of SDO, four PV models with diverse characteristics including RTC France silicon solar cell, PVM 752 GaAs thin film cell, STM6-40/36 monocrystalline module, and STP6-120/36 polycrystalline module are employed. The experimental results comparing with ten state-of-the-art algorithms demonstrate that SDO performs better or highly competitively in terms of accuracy, robustness, and convergence. In addition, the sensitivity of SDO to variation of population size is empirically investigated. The results indicate that SDO with a relatively small population size can extract accurate and reliable parameters for PV models.
关键词： parameter extraction,cobweb model,solar photovoltaic models,supply-demand-based optimization,metaheuristic
更新于2025-09-11 14:15:04
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[IEEE 2019 International Conference on System Science and Engineering (ICSSE) - Dong Hoi, Vietnam (2019.7.20-2019.7.21)] 2019 International Conference on System Science and Engineering (ICSSE) - Facade Integrated Photovoltaic Systems: Potential Applications for Commercial Building in Vietnam
摘要： In this paper, we investigate the potential applications of facade integrated photovoltaic (PV) systems for commercial buildings in Vietnam. By integrating PV systems into the facade of buildings, we can reduce the energy consumption of the building, including air conditioning and lighting systems. Our study proposes a comprehensive approach to designing suitable PV facade systems for commercial buildings in Vietnam, which includes the selection of appropriate PV panels, facade types, and inverter configurations. We also introduce essential simulation software for planning and designing facade PV systems and for simulating the overall building energy performance. The results of our study demonstrate that facade PV systems can significantly decrease the energy consumption of commercial buildings in Vietnam.
关键词： facade PV,micro inverter configuration,building-integrated photovoltaic (BIPV),facade wall
更新于2025-09-11 14:15:04