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[IEEE 2020 5th International Conference on Devices, Circuits and Systems (ICDCS) - Coimbatore, India (2020.3.5-2020.3.6)] 2020 5th International Conference on Devices, Circuits and Systems (ICDCS) - Recent Research Trends in Solar Photovoltaic Systems
摘要： In recent years, conventional energy sources are depleting and getting exhausted. In replacement of this, solar Photovoltaic (PV) systems are used because of its free availability, renewability and less operating cost. But the constraints such as low ef?ciency, dependability on weather conditions are overcome by using maximum power point tracking(MPPT) algorithms and ef?cient converters to produce the maximum power output. MATLAB/Simulink is used to model and analyze PV array, MPPT algorithms, and converters. In this paper, recent research developments in PV array, various MPPT techniques, many ef?cient Converters are presented. This paper will give an overall idea about the present research trends in the ?eld of Solar Photovoltaic systems.
关键词： Solar Photovoltaic Systems,Converters,Solar PV array,PID controllers,MPPT
更新于2025-09-23 15:19:57
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[IEEE 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC) - Waikoloa Village, HI (2018.6.10-2018.6.15)] 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC) - Test Platform for Photovoltaic Systems with Integrated Battery Energy Storage Applications
摘要： We present a hybrid simulation and a real-time test platform for developing control systems for photovoltaic (PV) inverters with integrated battery energy storage (BES). The platform consists of a dual-stage single-phase PV inverter system, DC coupled with a full-bridge grid connected inverter, which emulates the charge regulator and battery bank. The real-time control of the two power electronic converters is implemented in a Simulink/dSpace platform, together with the real-time simulation model of the battery pack. The input power can be provided by either a high performance PV emulator or by a physical PV array. The platform enables real-time testing of PV+BES control systems and energy management systems (EMS), for a variety of battery technologies, which can be modelled in detail and emulated by the full-bridge grid connected inverter. Such flexibility is difficult to achieve with real BES systems, due to electrical safety and cost constrains of high power charge regulators and battery packs.
关键词： Energy storage,Test equipment,Battery Emulator,Photovoltaic systems
更新于2025-09-19 17:15:36
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - A method for error compensation of modeled annual energy production estimates introduced by intra-hour irradiance variability at PV power plants with a high DC to AC ratio
摘要： Financial models of PV power plants that are created during the development phase of a project are typically based upon simulations performed at hourly timesteps. Historical irradiance data used in these simulations, such as a Typical Meteorological Year, are created from average irradiances over hour-long periods. We find that when actual weather conditions include significant intra-hour variability in irradiance, the annual energy production estimates based on modeling in hourly timesteps will not account for all inverter clipping which occurs during moments of high irradiance. This effect is particularly significant for systems with high a DC to AC nameplate ratio. At some PV plants already in operation, this phenomenon has been found to result in overestimated production estimates of nearly 5%. In this work, the average amount of this error is quantified for locations within the United States, and a methodology is proposed for compensating for it in post processing. This methodology applies a variable discount to each hour of the year for hourly energy output simulations based on irradiance. The discount function is intended to account for the difference in useful insolation as computed from hourly average irradiance data versus sub-hourly sampling rates.
关键词： photovoltaic systems,power system modeling,performance analysis,solar energy,solar power generation,power system simulation
更新于2025-09-19 17:13:59
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L vs. LCL Filter for Photovoltaic Grid-Connected Inverter: A Reliability Study
摘要： The increasing use of photovoltaic systems entails the use of new technologies to improve the efficiency and power quality of the grid. System performance is constantly increasing, but its reliability decreases due to factors such as the uncontrolled operation, the quality of the design and quantity of components, and the use of nonlinear loads that may lead to distortion in the signal, which directly affects the life of the system globally. This article presents an analysis of the reliability of a single-phase full-bridge inverter for active power injection into the grid, which considers the inverter stage with its coupling stage. A comparison between an L filter and an LCL filter, which comprise the coupling stage, is made. Reliability prediction is based on metrics, failure rate, mean time between failures, and total harmonic distortion. The analysis and numerical simulation are performed. Finally, filter considerations are suggested to extend the reliability of the inverter in a photovoltaic system.
关键词： photovoltaic systems,LCL filter,L filter,reliability,total harmonic distortion
更新于2025-09-19 17:13:59
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[IEEE 2019 FISE-IEEE/CIGRE Conference - Living the energy Transition (FISE/CIGRE) - Medellin, Colombia (2019.12.4-2019.12.6)] 2019 FISE-IEEE/CIGRE Conference - Living the energy Transition (FISE/CIGRE) - Considerations for the Assessment Resilience in Low Voltage Electrical Network with Photovoltaic Systems a?? Part I
摘要： Resilience promises to be a concept to integrally evaluate the operation of an electrical grid, to guarantee in the robustness, reliability, adaptability, and restoration electrical system. Resilience is mainly studied to analyse the negative effects caused by high impact events and low probability of occurrence (e.g. natural disasters) in power systems and medium voltage distribution networks. This paper aims to present considerations about the assessment of resilience to evaluate a low-voltage power grid with photovoltaic systems. The resilience level may be a unique quantitative value that defines in real-time the operational state of the electrical grid. This paper proposes the resilience evaluation in 1 to 10-minute observation window using four concepts, given weights to each concept and proposing two-visualization form of resilience. Therefore, this research proposes the resilience study in low voltage networks that integrate distributed resources, seeking to highlight the importance of evolution-temporary evaluation.
关键词： resilience diamond,Low voltage,photovoltaic systems.,resilience curve
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 7th International Conference on Smart Energy Grid Engineering (SEGE) - Oshawa, ON, Canada (2019.8.12-2019.8.14)] 2019 IEEE 7th International Conference on Smart Energy Grid Engineering (SEGE) - Nonlinear Control of a Boost DC/DC Converter for Photovoltaic MPPT Systems Using a TMS320F28379D Microcontroller
摘要： This work presents a nonlinear controller of a boost dc/dc power converter for photovoltaic (PV) maximum power point tracking (MPPT) systems. The scheme of the proposed controller consists of the design of a nonlinear controller for the duty cycle generation. For this purpose, a simple and low-cost voltage-oriented controller is proposed in this study. In fact, this control algorithm is suitable to efficiently track fast irradiance changes. Consequently, the efficiency of the overall MPPT system is improved by avoiding loss of PV power caused by i) oscillatory responses due to varying irradiance conditions and ii) load disturbances. In addition, by assuming passivity properties of the constitutive relationship of the load element, internal stability of the closed-loop system is guaranteed for different load conditions, which are applicable for most PV applications. Besides, the internal stability allows to consider load scenarios affected by bounded disturbances. Finally, the proposed MPPT control system is implemented by using a proportional-integral-derivative controller, thereby providing a low-cost solution, which is programmed in the TMS320F28379D DSC Board. Experimental results by considering several scenarios, i.e., i) irradiance changes, ii) changes of setpoint and iii) load disturbances are illustrated to validate the effectiveness of the proposal.
关键词： photovoltaic systems,MPPT,nonlinear control,boost converter
更新于2025-09-19 17:13:59
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Application of static network reconfiguration to minimize power consumption from grid for photovoltaic systems
摘要： Photovoltaic (PV) is one of the distributed generation growing worldwide, a proper method to increase the hosting capacity of PV with low cost is becoming an interesting topic. This paper researched how the total grid purchase of power systems can be decreased by applying static network reconfiguration. The problem is formulated as a load flow which aims to minimize the total grid purchase under thermal and voltage constraints. The effectiveness of the approach and the significant benefits obtained by static reconfiguration options in term of total grid purchase are demonstrated using a modified benchmark distribution system. It was found that applying static network reconfiguration to this specific test system with two PVs gave minimum power consumption from grid.
关键词： power consumption,Photovoltaic systems,distributed generation,static network reconfiguration,grid purchase
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering (REPE) - Toronto, ON, Canada (2019.11.2-2019.11.4)] 2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering (REPE) - Prediction of Solar Resource and Photovoltaic Energy Production through the Generation of a Typical Meteorological Year and Meso-NH Simulations: Application to the South of Portugal
摘要： The goal of this work is the generation of solar resource and photovoltaic (PV) energy maps based on simulations of a Numerical Weather Prediction model (NWP) for a Typical Meteorological Year (TMY). This approach is applied to the South of Portugal. Sixteen years of observations were used to determine a TMY for the city of évora, which is located near the center of the region, through the Sandia method and the Finkelstein-Schafer statistics. The NWP Meso- NH model, with the ecRad radiation scheme integrated, is used to simulate the TMY, allowing for the generation of solar resource and air temperature maps that are helpful in predicting PV potential, thus constituting a useful tool for planning and designing this type of solar systems.
关键词： Typical meteorological year,Meso-NH,Photovoltaic systems,Solar energy
更新于2025-09-19 17:13:59
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New monitoring method to characterize individual modules in large photovoltaic systems
摘要： Photovoltaic (PV) systems power losses are approximately 15–20% of the performance ratio for current PV systems. There are several reasons that explain PV modules failures, and since they are connected in series to the rest of the string, a failure in one module may result in losses in the entire string. In addition, some of these failures, if are not fixed in time may become permanent and may reduce the lifespan of the PV modules. Periodic monitoring is the only way to detect these failures. Monitoring techniques oriented to groups of modules are unable to detect faults in individual modules. I-V curve tracers, which are oriented to module level and use power electronics components and large capacitors, require to disconnect the PV module from the rest of the system and long measurement times. This works proposes a methodology, that is able to take partial measurements of individual PV modules and recompose their characteristics with only small capacitors in the range of tens of microfarads and without power electronics components. The monitoring methodology is able to measure individual PV modules without modifying the electrical interconnection circuit and to deviate the operating point to 0.3 A and 5 V in less than 5 ms. From this deviation, the system recomposes the PV module I-V characteristics with accuracies that are between 1 and 3% for the region close to maximum power.
关键词： Monitoring,Fault detection,Photovoltaic systems,Capacitive load,Maximum power point
更新于2025-09-19 17:13:59
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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) - Analysis of Harmonic Distortion on Low Voltage Distribution Systems with Electric Vehicles and Photovoltaic Systems
摘要： Power electronic interfacing based devices, such as photovoltaic systems and electric vehicles chargers cause harmonic distortion on the power grid. This has been an increasing concern, especially in low voltage residential systems as these devices are becoming common and expected to be largely integrated into distribution systems. In this context, this paper focuses on a harmonic analysis based on daily simulations considering loads and generation pro?les with characteristics spectra of harmonics for residential loads, photovoltaic systems and electric vehicle chargers. Effects on the grid will depend on the phase angles of each harmonic component, distortion indexes will not behave in a simple additive way due to the variety of connected devices.
关键词： harmonic distortion,electric vehicles,Distribution systems,photovoltaic systems,low voltage
更新于2025-09-16 10:30:52