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[IEEE 2019 3rd International Conference on Energy Conservation and Efficiency (ICECE) - Lahore, Pakistan (2019.10.23-2019.10.24)] 2019 3rd International Conference on Energy Conservation and Efficiency (ICECE) - Accelerated PSO-Scaled PI Controller for DC-DC Boost Converter in Photovoltaic Systems
摘要： In the following paper, the Proportional-Integral (PI) controller of the DC-DC boost converter are tuned with and without using the accelerated particle swarm optimization algorithm (APSO) and the performance of the converter is analyzed under the effect of the variable irradiation level of the photovoltaic (PV) module. The mathematical modeling of the photovoltaic module is implemented in the MATLAB/Simulink having two variable parameters, temperature and irradiation level to change the output of the module. The output of the PV module is fed to DC-DC boost converter having a particular value of the duty cycle ratio to increase the voltage to the desired constant value. A three phase sinusoidal pulse width modulation (SPWM) inverter having DC link voltage coming from the converter’s output is simulated in the MATLAB/Simulink and a three phase resistive load is connected across the output terminals of the inverter to get phase and line voltages of the inverter. The irradiation level is used as a variable parameter having a step change at regular intervals and the output voltage of the DC converter under the close feedback system is observed. A comparison is made between the tuning parameters of the PI controller calculated with and without using the Accelerated particle swarm optimization algorithm.
关键词： boost converter,photovoltaic (PV) system,PI controller,Accelerated Particle Swarm Optimization (APSO),SPWM inverter
更新于2025-09-12 10:27:22
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Progress of MWCNT, Al <sub/>2</sub> O <sub/>3</sub> , and CuO with water in enhancing the photovoltaic thermal system
摘要： Hybrid photovoltaic thermal system is an effective method to convert solar energy into electrical and thermal energy. However, its effectiveness is widely affected due to the high temperature of photovoltaic panel, and it can be minimized by employing nanofluids to the PV/T systems. In this research, the effect of various nanoparticles on the PV/T systems was studied experimentally. The nanofluids Al2O3, CuO, and multiwall carbon nanotube (MWCNT) were dispersed with water at different volume fractions of 0, 0.5, 1, 2.5, and 5 (vol%) using ultrasonication process. The effect of nanomaterials on viscosity and density was classified. All tests were carried out in an outdoor laboratory setup for calibrating the PV temperatures, thermal conductivity, electrical power, electrical efficiency, and overall efficiency. In addition, the energy analyses were also made to estimate the loss of heat owing to the nanofluids. Results show that use of the nanofluid increased the electric power and electrical efficiency of PV/T compared with water. Furthermore, MWCNT and CuO reduced the cell temperature by 19%. Consequently, the nanofluids MWCNT, Al2O3, and CuO produced the impressive values of 60%, 55%, and 52% increase in an average electrical efficiency than conventional PV. Particularly, the MWCNT produced superior results compared with other materials. It is evidently clear from the result that the introduction of the nanofluid increases the thermal efficiency without adding any extra energy to the system. Moreover, insertion of Al2O3, CuO, and MWCNT on PV/T system increases the exergy efficiency more than conventional PV module.
关键词： photovoltaic thermal system,solar energy,nanoparticles,nanofluid,exergy,hybrid PV/T collectors
更新于2025-09-12 10:27:22
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An overview of energy efficient solid state LED driver topologies
摘要： LED lamps are projected as prospective successors of incandescent lamps with high efficiency and a long lifetime. Therefore, there is a need to develop energy efficient LED driver topologies for achieving constant current regulation, despite the effects of temperature on the LED V‐I characteristics. This paper presents the salient features of various LED driver topologies with a focus on power density, multi‐string operation, renewable energy utilization, soft switching, optical wireless communication, reliability and size. The performance of the above topologies is analysed in terms of the number of components, converter switching frequency, galvanic isolation, power rating and efficiency. This paper takes a look at efficiency improvement methods while dwelling on aspects of lifetime and reliability prediction of LED drivers. The paper will anticipate some of the future trends associated with the adaptation of wide bandgap power semiconductor materials, smart LED lighting for the internet of things (IoT) and programmable LED lamp drivers. This detailed technology review is extremely useful for researchers, designers and engineers in choosing the right topology.
关键词： photovoltaic,dimmable LEDs,light emitting diode,organic LEDs,DC‐DC converters
更新于2025-09-12 10:27:22
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Photovoltaic active power control based on BESS smoothing
摘要： The power fluctuation of photovoltaic (PV) is harmful to power systems, so the battery energy storage system (BESS) was applied to smooth power fluctuation in PV. At present, the main ways to get configuration of BESS are low-pass filter and spectrum compensation, which have some drawbacks. In this paper, a method that combines empirical mode decomposition (EMD) with wavelet analysis (WA) is proposed to get grid-connected active power expectation of PV properly. Based on simulation of PV output, the minimum sizing of BESS is determined by different batteries’ state-of-charging (SOC) and efficiency. Comparing traditional low-pass filter and spectrum compensation, this method not only acquires the capacity of BESS accurately, but also improves the effect to smoothing power fluctuation of PV effectively. Finally, a case is proposed to verify correctness of the theory.
关键词： Sizing energy storage capacity,Empirical mode decomposition (EMD),Wavelet analysis,Photovoltaic output
更新于2025-09-12 10:27:22
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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) - Industry 4.0 approach aligned with the challenges of grid-connected photovoltaic systems
摘要： Technological innovations applied to photovoltaic (PV) energy are important for improving the process of conversion and management of energy, being one of the renewable energies challenges. In this occasion, the phenomenon called Industry 4.0 encourages new concepts and methods of work for several areas integrating automation systems, cyber-physical systems, and the internet, facilitating innovations, such as using smarts grids. Thus, this paper aims to show the challenges for PV systems and brings the union of possible solutions applied in a photovoltaic plant with an approach to Industry 4.0. To do so was analyzed the main challenges for each component and proposed a PV system in software PV*SOL with power optimizers, inverter, and PV modules cleaning system. Subsequently, the proposed system is compared with other scenarios. An analysis was made in different soiling losses in PV modules, i.e., situations without the PV cleaning system, and tested the application of Industry 4.0 elements in conventional systems with and without solar trackers. As a result, the proposed scenario generated more energy than the conventional PV system. In situations, without carrying out cleaning in the PV modules the power generation was lower, even with a better global optimization performance due to the power optimizers that mitigates part of the energy losses. Therefore, Industry 4.0 can provide connectivity, visibility, predictability, and adaptability improving better control over the variables involved in PV systems.
关键词： Photovoltaic Plant,Photovoltaic System,Industry 4.0,Photovoltaic
更新于2025-09-11 14:15:04
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[IEEE 2018 IEEE International Conference on Information and Automation (ICIA) - Wuyishan, China (2018.8.11-2018.8.13)] 2018 IEEE International Conference on Information and Automation (ICIA) - Research on Photovoltaic Power Generation Power Prediction Algorithm Based on Component Aging
摘要： The timely safety improvement of power system scheduling and the reasonable arrangement of various forms of power supply work are realized by the accurate photovoltaic power forecasting.Therefore, in order to achieve a more accurate forecast of photovoltaic power, In this paper, the photovoltaic power generation system based on the theory of the similar day output power of the defects in the prediction algorithm was improved, in the new algorithm consider the aging of components, so it is concluded that the power prediction more accurate.
关键词： Photovoltaic power generation,Prediction algorithm,Photovoltaic panel life cycle,Power prediction
更新于2025-09-11 14:15:04
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Advanced Cooling Technologies and Applications || Development of Modular Cooling for Water-Cooled Photovoltaic Plant in Real Scale
摘要： This chapter evaluates module architectures and units of photovoltaic cooling systems, aiming to determine, select and design a modular system that can be applied in a real-scale photovoltaic power plant (PVPP) in order to enhance the yields of electricity production (entitled cooled photovoltaic plant). An analysis of the local climatic, geographic and solar conditions as well as construction, operational and maintenance aspects was carried out. Worldwide, there are three main types of cooled photovoltaic systems: PVT liquid and air collectors, PV ventilated with heat recovery and non-PVT systems. Based on the local weather conditions (tropical warm and dry) with both temperature and solar irradiation index being high, it results the PVT-liquid system to be more suitable in a scenario with available cooling fluid. We conclude that the best design and arrangement of the cooling system are of the type coil and multiple channel because they permit better rates of heat exchange between the cooling fluid and the PV module.
关键词： solar energy,cooling photovoltaic system,photovoltaic/thermal,PVPP,SFV
更新于2025-09-11 14:15:04
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Building integrated photovoltaic modules and the integration of phase change materials for equatorial applications
摘要： The performance of building integrated photovoltaic (BIPV) system depends on the geographical location and the incident angle of solar radiation. In this paper, a simple mathematical model has been developed to predict the performance of BIPV modules with and without phase change material (PCM). The effect of transmittance of the BIPV glass cover is studied with respect to incident solar radiation. The performance curves, annual energy and exergy gains are analysed for hot and humid climatic conditions of Kovilpatti (9°10'00"N, 77°52'00"E), Tamil Nadu, India. The annual electrical energy gains of the BIPV-PCM for the south orientation is (135 kWh) and the east orientation (110 kWh) obtained the minimum. Similarly, the annual electrical energy of the BIPV-PCM is maximum in the east orientation and minimum in the west orientation. The south orientation BIPV-PCM obtained the maximum energy (190 kWh) and exergy (27.3 kWh). The theoretically calculated results have good agreement with experimental results. Practical application: Integration of photovoltaic modules into the building structure has many benefits and challenges; before integrating into the building structure, the performance and impact of the BIPV module needs to be studied. This study will assist developers and designers to understand the likely performance of the BIPV modules and assess the benefit of integrated phase change materials for application in residential buildings in equatorial climate zones.
关键词： Glauber salt,Facade,building integrated photovoltaic phase change material,Building integrated photovoltaic
更新于2025-09-11 14:15:04
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A new production cost effectiveness factor for assessing photovoltaic module cooling techniques
摘要： Numerous cooling techniques are available to reduce photovoltaic module (PV) temperature and thus improve PV efficiency. Sometimes, the manufacturing cost of some PV cooling techniques is higher as compared with their power productivity, and thus the cost parameter is needed to be taken into consideration to justify producing certain PV cooling techniques. This paper is intended to link the manufacturing cost of the PV cooler with its output power by providing an economic analysis as there is a research gap in previous studies related to the economic aspect of these products. It proposes a new method by defining and deriving a new parameter called the PV cooling technique production cost effectiveness factor whose value is affected by the PV efficiency gained of a PV with and without a cooler, the manufacturing cost of the PV cooling technique, and the cost of one watt of PV power. Based on the value of this new factor, three possible classifications are suggested. They are production/not production cost effective or neutral. To determine the optimum PV cooler, the minimum value of the PV cooling technique production cost effectiveness factor is defined. The applicability conditions and limitations of the proposed method are illustrated. It is shown that the PV cooling technique production cost effectiveness factor and its minimum value are helpful in classifying the PV cooling techniques based on their power productivity and manufacturing cost. This parameter may have a potential to be used by PV cooling technique designers and manufacturers on making their design decisions.
关键词： manufacturing cost,photovoltaic module,photovoltaic efficiency,PV cooling technique,PV cooling technique production cost effectiveness evaluation
更新于2025-09-11 14:15:04
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Hybrid Solar Cells with a Sunlight Concentrator System
摘要： Hybrid solar cells based on InGaP/Ga(In)As/Ge multijunction structures integrated into crystalline Si heat-removal base and provided with sunlight concentrator system based on linear Fresnel lenses and carboplastic mount structure have been developed and investigated. The hybrid solar cells with sunlight concentrators in the photovoltaic module provide a specific electric power of 390 W/m2 (AM0, 1367 W/m2) at a photoconverter unit specific weight reduced to 1.0 kg/m2. Improved photovoltaic characteristics and high radiation resistance allow using the proposed hybrid solar modules with sunlight concentrators in space solar batteries and autonomous power supply facilities.
关键词： linear Fresnel lens,concentrator photovoltaic module,hybrid solar cell,multijunction photovoltaic cell,solar battery
更新于2025-09-11 14:15:04