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- 摘要
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- 实验方案
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Specifications of Photovoltaic Pumping Systems in Agriculture || Photovoltaic Energy: Basic Principles
摘要： The sun is a star which provides nearly 95% of its energy to generate nearly all the energy available on the earth. In fact, the earth energy is a direct or indirect conversion form of the sun’s lights. For instance, the solar heat ensures the plants evaporation-transpiration by converting the sunlight energy into storable chemical form through the photosynthesis process, which allows the fauna and flora to be maintained in the earth. Moreover, the sunlight is the source of generating wind and wave energies, by causing temperature difference in the atmosphere. Additionally, sunlight generates the photothermal and photovoltaic energies, which are used to provide electrical and heat energies. Consequently, sun means life.
关键词： P-N junction,Silicon atom,Solar radiation,Photovoltaic energy,Solar cell efficiency
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 4th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC) - Chengdu, China (2019.12.20-2019.12.22)] 2019 IEEE 4th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC) - Research and Application of Grid-connected Control Device for Distributed Photovoltaic Power Supply
摘要： Distributed photovoltaic grid connection has impaired the power quality of the distribution network. Aiming at this salient problem, a regulation method for the voltage at the point of interconnection in the distribution network is proposed. Besides, the basic principles of voltage regulation device are introduced, and the computing method for the capacity energy storage battery configuration, matched with the power generation capacity, is given. The simulation model based on the full-control device is built in the PSCAD environment, which verified the accuracy of the control strategy and the favorable dynamic adjusting performance. Finally, by the prototype developed, the effectiveness of the new regulation method for the voltage at the point of interconnection in the distribution network is proved.
关键词： Voltage,Distributed photovoltaic,Energy storage,Simulation model
更新于2025-09-19 17:13:59
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - New Approaches for Low Power Photovoltaic Water Pumping Systems
摘要： Photovoltaic water pumping systems are available as kits to supply water where the grid does not go. These kits usually are made by multinationals and based on specific components, making the most of small and very small companies, who usually install these systems, dependent on others. Thankfully these companies can develop their own solutions with standard frequency converters and AC pumps. An alternative is to connect the standard frequency converters to a photovoltaic string with a DC voltage of the order of some hundreds of volts. This implies in more than 2kW of power installed. For many applications, more than 2kW would be oversized. This paper presents a review of photovoltaic water pumping systems based on standard frequency converters and proposes new approaches for low power applications requiring only up to four modules. These approaches are being investigated and evaluated in cooperation with a company.
关键词： Photovoltaic Pumping,AC Pumps,Boost Converter,Frequency Converter,Photovoltaic Energy
更新于2025-09-16 10:30:52
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[IEEE 2019 6th International Conference on Control, Decision and Information Technologies (CoDIT) - Paris, France (2019.4.23-2019.4.26)] 2019 6th International Conference on Control, Decision and Information Technologies (CoDIT) - Tilt Angle Optimization of Photovoltaic Panels
摘要： The solar PV power sector in Spain has been developing at a spectacular rate in recent years. The energy cost and the dependence on fossil fuels can be reduced by improving the efficiency of photovoltaic energy production The performance of a solar radiation conversion system is affected by tilt angle with the horizontal plane. Thus, a photovoltaic array needs to be tilted at the correct angle to maximize its performance. In this paper, we investigate how to determine the optimum tilt angle. This procedure is illustrated for the city of Barcelona (Spain) located at latitude 41o 22' 56'' North and longitude 2o 6'56'' East. The optimal tilt angle varies according the seasons: In Winter (December, January, February) is 56.4, in Spring (March, April, May) is 29.11? in Summer (Jun, July, August) is 13.76? and in Autumn (September, October, November) is 48.14?. Finally, the annual optimum tilt angle for our latitude is 36.87?, with this optimal slope angel, maximum monthly and annual solar radiation is calculated. So, by means of the proposed approach, the energy generation is increased in 10.54% thanks to we are able to benefit from the maximum solar radiation.
关键词： solar PV power,optimum tilt angle,Barcelona,solar radiation,photovoltaic energy production
更新于2025-09-16 10:30:52
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[IEEE 2019 16th International Multi-Conference on Systems, Signals & Devices (SSD) - Istanbul, Turkey (2019.3.21-2019.3.24)] 2019 16th International Multi-Conference on Systems, Signals & Devices (SSD) - Adaptive Sliding Mode Control of Power System with Photovoltaic Generator
摘要： The increased penetration of renewable energy sources to the grid has been proved to affect both the steady state performance and the transient stability of the power system. For instance, the bus voltage magnitudes, the relative rotor angle and synchronism are the most affected system parameters during transients in the system with high penetration of photovoltaic (PV) sources. The aim of this paper is to elaborate, using sliding mode technique, an adaptive nonlinear controller that stabilizes the closed loop system whatever the penetration of PV energy sources and without resorting to the measurement of electrical power. The controlled system consists of a synchronous generator (GS), a photovoltaic generator, and an infinite bus corresponding to a large system to which the two generators are connected. It is shown, using formal analysis and simulation results, that the proposed controller achieves all the control objectives, mainly: i) tight regulation of the phase angle of the GS voltage for the infinite bus voltage, ii) good estimation of uncertain parameter, and iii) asymptotic stability of the closed loop system.
关键词： stability analysis,Power system,photovoltaic energy,sliding mode control
更新于2025-09-16 10:30:52
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[IEEE 2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA) - Xi'an, China (2019.6.19-2019.6.21)] 2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA) - Robust Predictive Current Control for Photovoltaic Energy Storage System Based on Second-order Tracking Differentiator
摘要： Aiming at the problem of DC bus voltage fluctuation due to the change of photovoltaic (PV) output power, load mutations and nonlinear loads connection in DC microgrid system including PV power generation and energy storage, the robust predictive current control (PCC) for photovoltaic energy storage system based on second-order tracking differentiator (STD) is proposed in this paper. The traditional current loop controller based on PI is replaced by the controller based on the PCC. And the second-order tracking differentiator for the DC bus voltage control system of bidirectional DC-DC converters is designed. The second-order tracking differentiator can track the equivalent disturbance current quickly in the system without adding additional current sensors. Feed forward method based on the STD is proposed to improve the disturbance rejection capability of the system. The simulation results show that the DC bus voltage fluctuations can be suppressed effectively by using the predictive current control based on second-order tracking differentiator, and the dynamic performance and robustness of the system are improved.
关键词： Photovoltaic Energy Storage System,Second-order Tracking Differentiator,Predictive Current Control,Bidirectional DC-DC Converter
更新于2025-09-16 10:30:52
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Design and Control of a Photovoltaic-Fed Dc-Bus Electric Vehicle Charging Station
摘要： This paper presents a stand-alone dc-bus Electric Vehicle (EV) charging station system using a photovoltaic (PV) source. The proposed topology includes a PV panel, an energy storage unit (ESU), and two EVs. Each unit is controlled independently; a voltage regulation scheme is implemented within the ESU converter to ensure the dc bus voltage is maintained at the nominal level under varying operating conditions. Two different operating scenarios are studied, and the results confirm that the algorithm developed allows regulating the dc bus voltage either with varying solar irradiance or when EVs are connected and disconnected from the dc grid. The proposed design offers lower energy conversion losses compared to the ac configuration and reduces energy demand on the existing ac distribution grid. It also finds applications in remote areas where parking facilities are provided for recreational purpose.
关键词： Electric Vehicle,Charging Stations,Photovoltaic,Energy Storage,Voltage control
更新于2025-09-16 10:30:52
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Light-Emitting Diode - An Outlook On the Empirical Features and Its Recent Technological Advancements || DC Network Indoor and Outdoor LED Lighting
摘要： LED lighting products have become a significant revolution in this technological sector. These components are, by nature, digital emitters created with semiconductor crystals that are powered with very low voltage and direct current (DC). Under these conditions, they have become one of the most relevant actors in the present tendency that is recovering the DC as the channel to transport and distribute energy and is reinforcing the photovoltaic (PV) panels as a relevant sustainable energy source that allows to improve the efficiencies of all types of lighting installations with the local self-generated energy. An analysis of the working principles of this component and the mechanism implemented for their control as lighting equipment to be powered with both conventional alternate current (AC) and DC is presented. A specific differentiation is done upon indoor and outdoor applications where new standards and regulations, specific technical procedures, and singular experimental project descriptions are detailed. The results expose the advantages and difficulties of implementation of this new DC paradigm, the main conclusion obtained up to this moment, and trends of future evolution.
关键词： direct current grid,LED drivers,LED lighting,photovoltaic energy,smartgrid
更新于2025-09-16 10:30:52
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Lithium-Ion Capacitor for Photovoltaic Energy System
摘要： A design of photovoltaic energy system consisting of a solar panel and hybrid supercapacitor is discussed. The application of lithium-ion capacitor in photovoltaic energy system is considered to be a novel promising way in order to fill up the gap between the specific energy, power and service life of the battery and supercapacitor. In this work there was developed an advanced lithium-ion capacitor that can provide both a sufficiently high energy density and the increased power density and service life. Developing the lithium-ion capacitors, the capacity of cathode can vary over a wide range, reaching the value required for the optimum photovoltaic energy system performance.
关键词： photovoltaic energy systems,supercapacitors,batteries,lithium-ion capacitors,hybrid electrochemical capacitors
更新于2025-09-16 10:30:52
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Impacts on the Output Power of Photovoltaics on Top of Electric and Hybrid Electric Vehicles
摘要： This paper investigates the potential output power of a photovoltaic (PV) installation on top of battery-powered electric vehicles (BEVs) and hybrid electric vehicles (HEVs). Firstly, we discuss the available area on the roof of BEVs and HEVs for deploying PV cells. Secondly, we verify the impact of the vehicles curved roof surface on the available output power of photovoltaics. More precisely, we present a method of calculating the effective area of PV cells, useful for PV simulation models and calculating the available output power of PV cells with different longitudinal angles. We verify our method within experiments and present the results of them, showing that the model predicts the output power of PV cells with an accuracy better than 2.5%. Furthermore, we discuss the impact of the curved surface and ambient conditions on possible interconnections of PV cells. Here, we present considerations for both, stationary and moving conditions, to highlight the dif?culties for interconnecting PV cells to form PV panels. From our experimental results, for frequent changes in the available solar radiation level, we can see a difference in terms of output power larger than 75% between series and parallel interconnections of PV cells.
关键词： battery-powered electric vehicle,photovoltaic energy,solar energy,simulation,data acquisition,measurement,environmental data,hybrid electric vehicle
更新于2025-09-12 10:27:22