- 标题
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Evaluation of the Success of a Small-Scale Photovoltaic Energy System
摘要： Solar photovoltaic energy generation is growing in Brazil and in the world. Considered a new investment alternative, many investors lack knowledge and difficulty in evaluating the success it will have with photovoltaic systems. This study aims to evaluate the percentage of investor success in a small scale photovoltaic power generation project in Brazil. A measurement modeling was developed through the methodology MCDM (AHP) and Key Performance Indicators (KPI). The case study was in a system of a supermarket of the state of Rio Grande do Sul, of 75kW of installed power. For the analysis of the importance of KPIs, 29 photovoltaic entrepreneurs in Brazil participated in the research. Analysis of the importance levels of the 33 KPI by the investor and the experts resulted in a 73.25% success rate of the project, classifying it as "Potential Success." Systematic analysis of a high initial capital investment is important in assisting the investor in decision making. The 33 KPI is relevant to an assessment of investor success.
关键词： Performance Measurement,Multicriteria Decision,Solar Photovoltaic Energy
更新于2025-09-12 10:27:22
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Experimental investigation of the soiling effect on the performance of monocrystalline photovoltaic systems
摘要： Due to the high solar irradiation records, desert regions are the most suitable for hosting photovoltaic power plants [1]. Nevertheless, these regions are characterized by the presence of dust and aerosols that can be deposited on the surface of the panels causing a considerable drop on the plants efficiency, thus, the power production. The objective of this study is to measure and understand the soiling’s effect on the performances of a 16.56 kWc monocrystalline grid connected PV system, after six months of exposition without cleaning at Green Energy Park research facility [2]. This facility is located in the mid-south of Morocco and characterized by a semi-arid climate. Besides, chemical analysis of the dust composition has been conducted to have an idea on the aerosols origin emission source. Results shown, that the cumulative power drop of the soiled string after six months was around 124 kWh. The daily power drop, in average, is of 2.7kWh/day during the dry period and of 0.07kWh/day during the rainy period. This is linked to a daily soiling rate of 0.32%/day and 0.02%/day during the dry and the rainy periods respectively. Regarding the dust chemical-analysis, the XRD results highlight the presence of silicon, alumina, calcium, iron, which are may be coming from a construction site close by. Besides, potassium, magnesium and phosphorus that may be coming from a phosphate mine in the area of our field of study.
关键词： dust effect,Photovoltaic,energy drop and performance ratio.,soiling ratio
更新于2025-09-12 10:27:22
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Design and Implementation of an IDA-PBC for a Grid Connected Inverter used in a Photovoltaic System
摘要： The paper presents an interconnection damping assignment - passivity based control (IDA-PBC) strategy applied to a grid-connected inverter interfaced Photovoltaic (PV) system. The PV power plant is integrated to the grid using a pulse-width-modulated converter. This is done to extract maximum energy from the renewable resource and feed it to the grid. The main contribution of this paper is to design a nonlinear control law based on IDA-PBC with a desired energy function along with an integral action. In the design of IDA-PBC, the Hamiltonian function is considered as a Lyapunov function candidate for analysing the stability criteria. In this paper, a step by step design procedure of the IDA-PBC is presented and the performance of the controller is compared with a conventional PI-based controller. A simulation study of the system is carried out in Matlab/Simulink environment. Finally, the simulation results show that the IDA-PBC with an integral action performs better during both transient and steady state conditions as compared with the PI-based controller.
关键词： Interconnection and damping assignment,Grid connected inverter,Photovoltaic energy conversion system,Port control Hamiltonian,Passivity based control
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Auckland, New Zealand (2019.5.20-2019.5.23)] 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Calculating the Output Power of Photovoltaic Cells 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 curved surface on the available output power of photovoltaics. Furthermore, we discuss the impact of the curved surface and the ambient conditions on the possible alignment of PV cells. Here, 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. Finally, 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%.
关键词： data acquisition,solar energy,environmental data,simulation,battery-powered electric vehicle,photovoltaic energy,measurement,hybrid electric vehicle
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Auckland, New Zealand (2019.5.20-2019.5.23)] 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Moving Photovoltaic (PV) Installations: Impacts of the Solar Radiation Level on the Output Power
摘要： This paper investigates the potential output power of moving photovoltaic (PV) installations. In particular, we focus on the impacts of the solar radiation level on the available output power of PV installations on top of moving objects. We discuss the situation for controlling the operating voltage of photovoltaics installed on top of battery-powered electric vehicles (BEVs) and hybrid electric vehicles (HEVs). We demonstrate that different longitudinal angles of PV cells due to curved roof surfaces and the fast slopes of the solar radiation level have a significant impact on the maximum power point tracking (MPPT) algorithm. We illustrate how the solar radiation level can reduce the efficiency of the MPPT algorithms.
关键词： data acquisition,photovoltaic energy,battery-powered electric vehicle,measurement,hybrid electric vehicle
更新于2025-09-11 14:15:04
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Performance analysis of mono and poly-crystalline silicon photovoltaic modules under Agadir climatic conditions in Morocco
摘要： The evaluation of a solar photovoltaic (PV) technology helps to identify its suitability for a specific location. The main objective of the present study is to assess the suitability of mono-crystalline silicon (mc-Si) and poly-crystalline silicon (pc-Si) PV modules with almost similar characteristics under Agadir climatic conditions. Electricity yield of these modules is calculated from the uninterruptible measured current–voltage curves from sunrise to sunset during a year. The influence of weather conditions, global irradiance and temperature, on the performances of the modules is assessed and as a part of considerations in the PV power plant design that the output power from pc-Si PV modules is found greater. Calculated annual average final yield (Yf), and performance ratio (PR) for mc-Si and pc-Si PV systems are (1602.22 kWh/kWp, 0.71), (1691.85 kWh/kWp, 0.75) respectively.
关键词： Performance,Outdoor monitoring,Photovoltaic,Energy yield,I–V curves
更新于2025-09-11 14:15:04
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[IEEE IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - Washington, DC (2018.10.21-2018.10.23)] IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society - Photovoltaic and Energy Storage Grid Integration with Fully Modular Architecture using Triple Port Active Bridges and Cascaded H-Bridge Inverter
摘要： This paper presents a novel architecture to integrate the photovoltaic and energy storage to the grid. The modular approach is provided by using the triple port active bridge DC-DC converter modules and the cascaded H-Bridge multilevel inverter structures. The modular approach helps in easy scaling up, easy maintenance and better controllability of the available power. The triple port bridge is capable of supplying and receiving power in any of its ports, allowing various control modes. Also the voltage control mode at its output allows for additional grid services. The cascaded H-bridge is a multilevel inverter with higher number of voltage levels, reduced ?lter size, lower switching frequency, lower dv/dt and EMC issues. The experimental and simulation results presented in this paper ensures that the proposed architecture is suitable for large scale photovoltaic and energy storage grid integration.
关键词： ZVS,cascaded H-bridge,Photovoltaic,Energy storage,triple port,Modular,multi-level
更新于2025-09-11 14:15:04
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[IEEE 2018 Global Internet of Things Summit (GIoTS) - Bilbao, Spain (2018.6.4-2018.6.7)] 2018 Global Internet of Things Summit (GIoTS) - Lighting IoT Test Environment (LITE) Platform: Evaluating Light-Powered, Energy HarvestingEmbedded Systems
摘要： As interest in the Internet of Things (IoT) grows, so does the requirement for distributed sensing, computation, and communication. Some projections reach a scale of over a trillion wireless devices, which creates a battery replacement challenge that is unsustainable for both human resources (replacement effort) and the environment (disposal). One ?eld of research that strives to meet this challenge is energy harvesting (EH) for self-powered systems. Photovoltaic (PV) cells enable EH capabilities and provide high energy density. They are also typically inexpensive, often making them the transducer of choice for self-powered systems. However, the performance of these EH nodes is rarely evaluated under realistic IoT environmental conditions, such as variable indoor lighting. Under low light, PV cells draw very little power and could place the self-powered system in a standby or even nonfunctional state. Most evaluations of EH systems in various lighting environments use software simulations to predict the behaviour of these nodes, but approximate models lack the exactness required to help with veri?cation of hardware in real conditions. Another approach is user testing in the ?eld, but this arduous solution would incur a variety of costs. This paper presents a third alternative: the Lighting IoT Test Environment (LITE) platform. The LITE platform is a tool that provides insight on how light-powered EH systems operate in low lighting environments. The LITE platform is able to physically emulate a variety of indoor and outdoor lighting sources with a novel mapping technique and provide time-series, environmental simulation of that source on a device under test (DUT). The light source emulation and time-series simulation capabilities are characterized with a worst case mean absolute percentage error (MAPE) of 3.2% and MAPE of 0.5%, respectively. By enabling engineers to accurately understand how these self-powered systems work under real world conditions, the LITE platform will better equip them to design, debug, and distribute fully functional and sustainable IoT nodes.
关键词： internet of things,test platform,system on chip,embedded systems,photovoltaic,energy harvesting,veri?cation
更新于2025-09-10 09:29:36
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Nocturnal electric vehicle charging interacting with a residential photovoltaic-battery system: a 3E (energy, economic and environmental) analysis
摘要： Increasing costs of petroleum derivatives, limitations on pollutant emissions and development of photovoltaic (PV) and electrical storage systems make it possible to spread the use of electrically powered vehicles. In this work, a 3E (energy, economic and environmental) feasibility study was carried out regarding an nocturnal electric vehicle (EV) charging in a residential user. In particular, three different EV charging scenarios were considered: use of the grid; use of a grid-connected PV system with a storage battery; use of a grid-connected PV system with a storage battery in the presence also of a residential user. Two sub-scenarios were examined that foresee the purchase of the EV as an alternative to a vehicle powered, respectively, by petrol and diesel. By considering different daily average distances travelled, a parametric study was developed in order to assess the influence of the size of the PV and storage system on the load satisfaction and solar energy utilization, economic convenience and emission savings. In general, it is not possible to simultaneously comply with all the 3E objectives and constraints. However, it is possible to select optimal EV-PV-battery combinations from a unique point of view or those that lead to a trade-off.
关键词： Emission savings,Battery Storage,Photovoltaic,Energy reliability,Electric vehicle,Economic feasibility
更新于2025-09-10 09:29:36
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Solar Water Pump
摘要： Solar powered water pumping systems have become the interest of many people in the recent years. Acknowledging that nature has provided a bounty of energy which can be converted into electrical energy has created innovative ways of discovering materials that can be used to make a system that supports turning heat into electricity. In this regard, the paper presented different concepts that relate to how the whole energy creation process is done and discusses useful ways of turning heat into useful energy. Furthermore, the recommendations dictate that while advancements in the technology are given attention, the issue of the investment cost and how it will thrive in the market is still a question. Nevertheless, many developing and developed countries continue to express interest in this area, and most are actively using and exploring how solar power can be used in other ways. Photovoltaic systems which are used to pump water for people, livestock and plants are an important move for technology and use of solar energy. Pumping water system using this PV technology has shown that is simple and that it does not require a lot of maintenance. In this regard, the idea gained the interest of farmers whose main concern is providing sufficient water not only for themselves but also for their plants and crops and livestock. The only major difference to this is that the system relies on solar energy as a power source for the pumps.
关键词： Energy,Direct Current (DC),Photovoltaic Energy,Electric Power Plant,Array,Photovoltaic (PV) System,Displaced or Volumetric Pump,Energy Consumption
更新于2025-09-09 09:28:46