- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 2nd International Conference on Energy Conservation and Efficiency (ICECE) - Lahore, Pakistan (2018.10.16-2018.10.17)] 2018 2nd International Conference on Energy Conservation and Efficiency (ICECE) - Performance Analysis of First Grid Connected PV Power Plant in Subtropical Climate of Pakistan
摘要： With the increasing penetration of both grid connected and standalone photovoltaic (PV) systems in Pakistan to cater the shortfall of energy, it is necessary to determine the performance and durability of already installed PV systems in different climates of country. This work aims to analyze the performance of first grid connected PV power plant located in Islamabad, Pakistan. The performance degradation of PV plants primarily depends on PV modules type (technology and design), regional climatic factors and field operating conditions. In this paper, performance ratio (PR) and degradation rate have been calculated from meteorological and performance data of plant to investigate the energy efficiency and modules quality over the course of operational years. Temperature losses due to module operating temperature were also estimated that primarily contribute to overall energy losses. This evaluation is of paramount importance for estimating the cost effect of the performance, identification of the underlying performance degradation and energy losses mechanisms, that help investors to choose climate specific modules technology and design for future plants and also to make efficient scheduling for preventive maintenance.
关键词： Photovoltaic (PV) system,performance index (PI),energy losses,climatic factors,degradation rate analysis,performance ratio (PR)
更新于2025-09-23 15:22:29
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[IEEE 2018 4th International Conference on Renewable Energies for Developing Countries (REDEC) - Beirut, Lebanon (2018.11.1-2018.11.2)] 2018 4th International Conference on Renewable Energies for Developing Countries (REDEC) - Modeling, P&O MPPT and PI controls and performance analysis of PV/Energy storage hybrid power system
摘要： The variable nature of renewable energy sources, coupled with unpredictable changes in load, requires the simultaneous implementation of high power and high energy density storage systems. This work addresses dynamic modeling, a PV/Batteries/Ultra capacitor hybrid energy system connected to a DC load in a remote house located around the town of Rouyn Noranda (Quebec-Canada) during one day in winter period. The P&O MPPT control is used to extract the maximum power of a photovoltaic generator which is considered as the main energy source of the hybrid system. In this paper, batteries and ultra-capacitors (UC) are serving as an energy storage system (ESS) and a main source in winter period. The UC are used for facing high frequency variations of the load, such as in transient state, while the batteries are in charge of slow load/source variations. Classical control of battery current and ultra-capacitor current allows choosing the suitable storage element in order to face correctly the production/consummation variations. Classical PI control strategy is proposed in manner to stabilize the DC bus voltage by controlling the attached DC/DC bidirectional converters. Simulations during 00 AM to 3 PM (during a snowy day) are carried out using Matlab/Simulink which confirm the good performances of the hybrid system and associated control systems.
关键词： energy storage system,performance analysis,Photovoltaic,hybrid energy system
更新于2025-09-23 15:22:29
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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) - Bifacial Performance Modeling in Large Arrays
摘要： Bifacial modules are being deployed at large PV systems, because of the potential to increase energy output, but their performance is still uncertain, increasing financial risk. To address the opportunity that bifacial modules present, we have developed a bifacial performance model and integrated it into a full PV system model to estimate the backside irradiance, combine it with the front side, and predict the total output power. To understand the effect of bifacial on performance, the NIST test array was simulated with bifacial modules and compared to an equivalent monofacial system while varying tilt from 20° to 40°. A bifacial gain of 10% was observed which increased with increasing tilt angle. The maximum yield occurred at 30° for the bifacial system, but at 25° for the monofacial system, demonstrating the advantage of modeling bifacial systems to optimize their performance.
关键词： view factor,bifacial,system performance,shading
更新于2025-09-23 15:21:01
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[IEEE 2018 IEEE 5G World Forum (5GWF) - Silicon Valley, CA, USA (2018.7.9-2018.7.11)] 2018 IEEE 5G World Forum (5GWF) - Multipath Propagation Analysis of 5G Systems at Higher Frequencies in Courtyard (Small Cell) Environment
摘要： The main target of this paper is to study the propagation characteristics of an outdoor and indoor user utilizing 5G system at higher frequency in a courtyard surrounded by building walls i.e. small cell environment. This research work is carried out by doing 3D ray tracing simulations utilizing “sAGA” – a 3D ray tracing tool. Unlike the conventional cellular network frequencies, the considered frequencies in the scope of this work are 15 GHz, 28 GHz and 60 GHz. For simulation routes, the results are provided in the form of received signal strength. For static points, the results are presented in the form of power angular spectrum and power delay profile. The achieved simulation results show that an adequate outdoor and indoor service can be provisioned at the considered frequencies. However, it is challenging to provide services to indoor user at 60 GHz using an outdoor base station even in such a small cell environment.
关键词： 3D ray tracing,multipath propagation,small cell,system performance,millimeter wave frequencies,5G
更新于2025-09-23 15:21:01
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Linear-Gompertz Model-Based Regression of Photovoltaic Power Generation by Satellite Imagery-Based Solar Irradiance
摘要： A simple yet accurate photovoltaic (PV) performance curve as a function of satellite-based solar irradiation is necessary to develop a PV power forecasting model that can cover all of South Korea, where more than 35,000 PV power plants are currently in operation. In order to express the nonlinear power output of the PV module with respect to the hourly global horizontal irradiance derived from satellite images, this study employed the Gompertz model, which is composed of three parameters and the sigmoid equation. The nonphysical behavior of the Gompertz model within the low solar irradiation range was corrected by combining a linear equation with the same gradient at the conjoint point. The overall ?tness of Linear-Gompertz regression to the 242 PV power plants representing the country was R2 = 0.85 and nRMSE = 0.09. The Gompertz model coe?cients showed normal distributions and equivariance of standard deviations of less than 15% by year and by season. Therefore, it can be conjectured that the Linear-Gompertz model represents the whole country’s PV system performance curve. In addition, the Gompertz coe?cient C, which controls the growth rate of the curve, showed a strong correlation with the capacity factor, such that the regression equation for the capacity factor could be derived as a function of the three Gompertz model coe?cients with a ?tness of R2 = 0.88.
关键词： photovoltaic system performance,Gompertz model,power output prediction,satellite-derived global horizontal irradiance,numerical analysis
更新于2025-09-23 15:19:57
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[IEEE 2019 Photonics North (PN) - Quebec City, QC, Canada (2019.5.21-2019.5.23)] 2019 Photonics North (PN) - Performance of diode-pumped Yb:CALGO and Yb:KYW lasers
摘要： Quantum key distribution (QKD) is an innovative technology that exploits the laws of quantum mechanics to generate and distribute unconditionally secure shared key for use in cryptographic applications. However, QKD is a relatively nascent technology where real-world system implementations differ significantly from their ideal theoretical representations. In this paper, we introduce a modeling framework built upon the OMNeT++ discrete event simulation framework to study the impact of implementation nonidealities on QKD system performance and security. Specifically, we demonstrate the capability to study the device imperfections and practical engineering limitations through the modeling and simulation of a polarization-based, prepare and measure BB84 QKD reference architecture. The reference architecture allows users to model and study complex interactions between physical phenomenon and system-level behaviors representative of real-world design and implementation tradeoffs. Our results demonstrate the flexibility of the framework to simulate and evaluate current, future, and notional QKD protocols and components.
关键词： system performance,system security,Quantum key distribution,modeling & simulation
更新于2025-09-19 17:13:59
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Intelligent photovoltaic panels based on solar tracking
摘要： The transformation of solar energy into electricity using photovoltaic cells has many economic and environmental benefits. As this technology reduces dependence on non-renewable energy sources, many developed and developing countries near the equator are increasingly willing to adopt such energy generation techniques. Its tilt angle with the horizontal plane and its orientation determines the photovoltaic panel (PV) yield. Thus the solar energy obtained from traditional photovoltaic panels can be maximized by replacing them with Intelligent photovoltaic panels. The Intelligent Photovoltaic panels adjust its orientation as well as tilt angle automatically with changing sun direction to receive maximum possible solar energy on its surface. A handful of studies on the orientation of tilt angle and its optimization have been conducted to improve the yield of photovoltaic panels; however, no solution has been proposed to estimate the optimum value of the parameters based on real-time monitoring.
关键词： Solar Radiations,Optimum Tilt Angle and Orientation,PV system performance,Real-time monitoring,Solar Energy,Intelligent Photovoltaic Panels
更新于2025-09-19 17:13:59
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Experimental performance assessment of a 2.25 kWp Rooftop PV system installed in the desert environment: a case study of Ghardaia, Algeria
摘要： The outcomes of an experimental study performed on a single grid-connected photovoltaic plant on the roof of parking are disclosed in the present paper. The PV system is located in southern Algeria (Latitude 32.26 N°, and longitude 03.46E°) at the Renewable Energy Applied Research Unit (URAER), Ghardaia, Algeria. This location is a desert and with a semi-arid climate. The performance results had been monitored for one year 2018. The present study aims to investigate the effect of seasonal variation on output parameters of PV systems. The results of some index parameters such as performance ratio (PR), array losses, system losses and yields (reference yield, array yields and system yields) are presented and discussed. Experimental results show that an essential variation in performance parameters has been seen for different seasons. The results show the maximum energy generated, reference yield, array yield, final yield, capacitor factor, capture and system losses in summer were 307,11 kW h/kWp, 5,35 kW h/kWp/day, 5,01 kW h/kWp/day, 4,74 kW h/kWp/day, 20,17%, 0,34 h/day and 0,27 h/day, respectively, while the maximum value of performance ratio (PR) was observed in winter (93, 06%). The grid is fed with a power of 3327, 15 kWh along the year.
关键词： grid-connected photovoltaic system,performance loss,The outdoor study,semi-arid climate,seasonal variation
更新于2025-09-19 17:13:59
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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) - Performance Evaluation of a Fleet of Photovoltaic Systems Across India and Southeast Asia
摘要： The growth of PV systems deployment continues to lead the rapid dissemination of solar photovoltaics as one of the primary sources of renewable electricity generation today across the globe. However, several solar technology entrants in new markets naturally mean that thousands of PV systems are being deployed and not necessarily performing at their highest potentials. The core location of new systems lies in Asia. Little information is also available on system performance across the scientific world and public databases with regards to large datasets of sites. This work aims to break that trend and expose the performance metrics of a considerable pool of distributed Asian PV systems (57 sites, ~42 MWp) based on a fleet of assets deployed in India and six other Southeast Asia countries. Challenges preventing optimal system operation are discussed and could be used as guidelines for higher-quality systems coming online in the years ahead in the region.
关键词： PV system performance,high-performing systems,distributed PV
更新于2025-09-19 17:13:59
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[IEEE 2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC) - Jackson, WY, USA (2018.6.3-2018.6.7)] 2018 IEEE International Power Modulator and High Voltage Conference (IPMHVC) - Aging Evaluation of Composite Insulator with Laser-induced Breakdown Spectroscopy
摘要： Quantum key distribution (QKD) is an innovative technology that exploits the laws of quantum mechanics to generate and distribute unconditionally secure shared key for use in cryptographic applications. However, QKD is a relatively nascent technology where real-world system implementations differ significantly from their ideal theoretical representations. In this paper, we introduce a modeling framework built upon the OMNeT++ discrete event simulation framework to study the impact of implementation nonidealities on QKD system performance and security. Specifically, we demonstrate the capability to study the device imperfections and practical engineering limitations through the modeling and simulation of a polarization-based, prepare and measure BB84 QKD reference architecture. The reference architecture allows users to model and study complex interactions between physical phenomenon and system-level behaviors representative of real-world design and implementation tradeoffs. Our results demonstrate the flexibility of the framework to simulate and evaluate current, future, and notional QKD protocols and components.
关键词： Quantum key distribution,system security,system performance,modeling & simulation
更新于2025-09-16 10:30:52