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Extracting issues significant to valuing electricity from small photovoltaic systems using quantitative content analysis
摘要： The feed-in tariff (FIT) scheme for small photovoltaic (PV) systems is fast approaching its closure or expiration in many countries. One of the issues after the closure of the FIT will be to determine the selling price of the surplus PV generation, for which valuing the surplus PV generation is essential. This study extracted issues significant to valuing electricity from PV systems by using quantitative content analysis in four states in Australia, where the local economic regulator conventionally estimates the value. Through quantitative content analysis, the region-specific issues relevant to each state were extracted. For example, forecast of wholesale price is the most significant issue in Victoria, where the methodology was not clear and the avoided wholesale cost tends to be overestimated. Similarly, in New South Wales and Queensland, merit order effect was the most significant issue among the stakeholders, where PV installation was higher than that in the other states. Thus, the proposed analysis method can be used to extract the issues relevant to valuing the electricity from PV generation.
关键词： Electricity tariff,Photovoltaic system,Feed in tariff,Energy policy,Renewable energy
更新于2025-09-12 10:27:22
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Control technique for single phase inverter photovoltaic system connected to the grid
摘要： In photovoltaic system connected to the grid, the main goal is to control the power that the inverter injects into the grid from the energy provided by the photovoltaic generator. The power quality injected into the grid and the performance of the converter system depend on the quality of the inverter current control. In this paper, a control technique for a photovoltaic system connected to the grid based on digital pulse-width modulation (DSPWM) which can synchronize a sinusoidal output current with a grid voltage and control the power factor is proposed. This control is based on the single phase inverter controlled by bipolar PWM Switching and lineal current control. The electrical scheme of the system is presented. The approach is widely explained. Simulations results of output voltage and current validate the impact of this method to determinate the appropriate control of the system. A digital design of the control based on generator PWM using VHDL is proposed and implemented on Field-Programmable Gate Array “FPGA”. The functional structure of this system with digital control has been validated with experimental results.
关键词： Inverter,Control,Bipolar PWM,Grid connected photovoltaic system
更新于2025-09-12 10:27:22
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Engineering design development of 52,5 KiloWatt peak solar photovoltaic system for industrial Rooftop building
摘要： The purpose of this research is to develop on-grid engineering design of 52,5 KW photovoltaic system on Industrial Rooftop Building. The development of solar photovoltaic system is to satisfy high demand of electrical energy for industry, offices, and public with minimum cost. Taking consideration of green energy, solar energy might be chosen as an alternative to generate electric power by utilization of Rooftop on industrial building. This research was conducted using broad database of meteorological data i.e. global daily horizontal solar irradiance. Additionally, Rooftop photovoltaic development, layout plan, photovoltaic array connection, Single Line Diagram and structure support photovoltaic module were developed using Helioscope and PV Syst software. Based on 6 months’ period simulation, annual energy produced on Rooftop is 1043.88 kWh/kWp, Global Horizontal Irradiance (GHI) 1301.96 kWh/m2, actual Global Horizontal Irradiance 5.6%, and performance ratio (PR) 80.30 % and capital Rooftop photovoltaic project forecast. This results can be used for industrial and big office in west Indonesian recommendation to develop solar energy system on Rooftop building
关键词： solar photovoltaic system,PV Syst,on-grid,industrial rooftop,Helioscope
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) - Particle Swarm Optimization of the GMPPT of Photovoltaic Energy Generation under Different Partial Shadding Conditions
摘要： The performance of a photovoltaic (PV) generation system (PGS) is directly associated with the irradiation incidence over the PV panel and the maximum energy will be delivered only for full panel illumination. However, when the PV panel (or strings of panels) operates under a partial shadowing condition (PSC), only a percentage of the maximum power will be delivered. This power can be even lower without a proper configuration of the conversion system. Therefore, we propose a partile swarm optimization (PSO) of the conversion system which improves the Maximum Power Point Tracking (MPPT) and ensures that the maximum power will be delivered despite of the partial shadowing condition.
关键词： Maximum Power Point Tracking (MPPT),Global Maximum Power Point (GMPP),PSO algorithm,photovoltaic system
更新于2025-09-12 10:27:22
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[IEEE 2019 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM) - Sochi, Russia (2019.3.25-2019.3.29)] 2019 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM) - Optimization of Attachment Place of Two Photovoltaic Systems to Power Line with Distributed Load
摘要： Distributed generation based on photovoltaic systems is of interest for scientists and specialists, since it has an impact on power losses in distribution networks and voltage deviations at consumers, due to the change in power flows from busbars. The article analyzes the effect of connecting two photovoltaic systems to a power line with a distributed load in terms of power losses. As the objects of research, the systems of power supply to poultry farms were analyzed. Two methods have been proposed for determining the optimal power and places of connection of photovoltaic systems from the obtained analytical expressions for minimum electric power losses in a power line with distributed load, and based on the developed nomogram making it possible to determine approximately different sets of distances and powers of photovoltaic systems.
关键词： optimum active power,losses of electrical energy,grid-connected photovoltaic system,photovoltaic system,power supply diagram
更新于2025-09-11 14:15:04
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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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A review on state of health estimation for lithium ion batteries in photovoltaic systems
摘要： Enhancing state of health (SOH) estimation accuracy and robustness for battery systems in photovoltaic (PV) systems is a feasible way to improve system performance and economics. Nevertheless, the SOH is not directly measurable and affected by a number of factors, therefore its estimation is challenging. Plenty of SOH estimation methods have been proposed for different applications, but little evaluation and discussion have been made for the SOH estimation for battery management systems in PV systems. In this paper, SOH estimation methods are categorised according to the signals that are used to extract the health indicator. Most methods are based on voltage characteristics while other signals such as temperature, ultrasound and force are also promising for SOH estimation. For each method, the basic theory, advantages and drawbacks are introduced and discussed. Then, a thorough comparison among the existing methods is conducted to provide readers with a comprehensive understanding of the development of the SOH estimation. Finally, key issues and suggestions on the SOH estimation are discussed to give novel insights to researchers and engineers.
关键词： State of health,Photovoltaic system,Battery management system,Lithium ion battery
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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An optimal switching approach toward cost‐effective control of a stand‐alone photovoltaic panel system under stochastic environment
摘要： The operation of a stand-alone photovoltaic (PV) system ultimately aims for the optimization of its energy storage. We present a mathematical model for cost-effective control of a stand-alone system based on a PV panel equipped with an angle adjustment device. The model is based on viscosity solutions to partial differential equations, which serve as a new and mathematically rigorous tool for modeling, analyzing, and controlling PV systems. We formulate a stochastic optimal switching problem of the panel angle, which is here a binary variable to be dynamically controlled under stochastic weather condition. The stochasticity comes from cloud cover dynamics, which is modeled with a nonlinear stochastic differential equation. In finding the optimal control policy of the panel angle, switching the angle is subject to impulsive cost and reduces to solving a system of Hamilton-Jacobi-Bellman quasi-variational inequalities (HJBQVIs). We show that the stochastic differential equation is well posed and that the HJBQVIs admit a unique viscosity solution. In addition, a finite-difference scheme is proposed for the numerical discretization of HJBQVIs. A demonstrative computational example of the HJBQVIs, with emphasis on a stand-alone experimental system, is finally presented with practical implications for its cost-effective operation.
关键词： stochastic optimal switching,cloud cover dynamics,Hamilton-Jacobi-Bellman quasi-variational inequalities (HJBQVIs),stand-alone photovoltaic system
更新于2025-09-11 14:15:04
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Study on Shunt Active Power Filter Control Strategies of Three-phase Grid-connected Photovoltaic Systems
摘要： This paper deals with the improvement of the energy quality using shunt active power filter. The three-phase grid-connected photovoltaic generator consists in solar panels, a three-phase voltage inverter connected to the grid and a nonlinear load constituted by a diode rectifier bridge supplying a resistive load in series with an inductor. In so doing, three main challenges arise from the application context. First, the harmonic currents and the reactive power must be compensated. The second challenge is the injection of active solar energy into the grid. Third, Maximum Power Point Tracking (MPPT) must be found. This paper proposes a method addressing those challenges. For the first and the second one, direct current and power controls is used. For the third challenge, an algorithm is proposed which take in account the electrical variables and the variation of the solar irradiation. Simulation results of the proposed method are shown. The method is illustrated with two different strategies: Hysteresis Control and Direct Power Control (DPC) for a variable load. Obtained results are presented and compared in this paper to confirm the robustness and the superiority of DPC strategy compared to Hysteresis Control strategy. In the same context, the simulation carried out in this article shows promising results with THD approximates 1.33 %.
关键词： photovoltaic system,MPPT,Direct Power Control,energy quality,Hysteresis Control
更新于2025-09-11 14:15:04