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[IEEE 2020 First International Conference on Power, Control and Computing Technologies (ICPC2T) - Raipur, India (2020.1.3-2020.1.5)] 2020 First International Conference on Power, Control and Computing Technologies (ICPC2T) - Load Frequency Control of Solar Photovoltaic/Wind/Biogas/Biodiesel Generator Based Isolated Microgrid Using Harris Hawks Optimization
摘要： This study proposes an approximate mathematical model of an isolated microgrid consisting of solar photovoltaic, wind turbine, biogas, biodiesel generators, flywheel and battery storage system for load frequency analysis. A proportional-integral(PI) cascaded through tilt-integral-derivative with derivative filter(TIDF) controller named PI-TIDF is suggested for load frequency regulation of the microgrid. To tune controller parameters a newly proposed harris hawks optimization(HHO) is applied utilizing ITAE fitness function. The superiority of the HHO is established by comparison with other techniques such as GOA, CSA and GA. Then using HHO, comparison between PIDF, TIDF and PI-TIDF is done for load frequency control. From frequency response, it is found that HHO tuned PI-TIDF is having better performance compared to TIDF and PIDF. Lastly, the ability of the suggested technique is examined by changing the frequency and magnitude of disturbances. In the changed disturbance case, proposed control scheme is proved to have satisfactory performance without retuning the controller parameters.
关键词： Microgrid,Load frequency control,Renewable energy sources,Harris hawks optimization,PI-TIDF controller
更新于2025-09-23 15:21:01
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[Advances in Intelligent Systems and Computing] Knowledge Engineering and Management Volume 214 || Knowledge-Based Decision System for Sizing Grid-Connected Photovoltaic Arrays
摘要： In this paper we have developed a methodology and a numerical model for sizing photovoltaic (PV) arrays for grid-connected power consumers. The decision variables proposed are the PV contribution to the power demand and a transfer factor. The latter is a new index that we have de?ned, and it constitutes key knowledge for decision making when aiming to reduce power transfers between a local power system and the electric grid. The developed model generates days of solar irradiance and calculates PV power output for commercial PV modules. Sizing diagrams are presented that illustrate how the PV capacity, for a speci?c location and a local power demand, affects the PV contribution to the demand and the power trades with grid. For the particular simulation conditions studied, the sizing diagrams show PV contribution saturation levels and global transfer factor minimums.
关键词： Photovoltaic solar power,Renewable energy,Optimization,Sizing
更新于2025-09-23 15:21:01
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[IEEE 2019 20th International Conference on Intelligent System Application to Power Systems (ISAP) - New Delhi, India (2019.12.10-2019.12.14)] 2019 20th International Conference on Intelligent System Application to Power Systems (ISAP) - Voltage Control Using Smart Transformer for Increasing Photovoltaic Penetration in a Distribution Grid
摘要： Uncertainty and variation of power generation through photovoltaic (PV) sources are major challenges for their integration with the distribution grid. Voltage rise and voltage drop issues limit the increase in PV penetration and loading level, respectively. It is important to maintain voltage levels within specified limits of grid code for providing long life, more efficiency, and good performance of consumer equipment while ensuring that the PV power generation is not curtailed. In this paper, a voltage control method for the smart transformer (ST) is proposed to improve voltage profile in the distribution network. Voltage control capability for ST is added through the method of switching among three setpoints based on the voltage. The proposed method is compared with the conventional method of switching between two setpoints based on current. The proposed method provides better voltage profile in the distribution network as compared to conventional method. Performance indicators are developed to understand the impact of voltage control methods on the system voltage profile. Proposed voltage control method is tested on a CIGRE low voltage residential distribution network.
关键词： voltage control,smart transformer,Renewable energy sources
更新于2025-09-23 15:21:01
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A fully planar solar pumped laser based on a luminescent solar collector
摘要： A solar-pumped laser (SPL) that converts sunlight directly into a coherent and intense laser beam generally requires a large concentrating lens and precise solar tracking, thereby limiting its potential utility. Here, we demonstrate a fully-planar SPL without a lens or solar tracking. A Nd3+-doped silica fiber is coiled into a cylindrical chamber filled with a sensitizer solution, which acts as a luminescent solar collector. The body of the chamber is highly reflective while the top window is a dichroic mirror that transmits incoming sunlight and traps the fluorescence emitted by the sensitizer. The laser-oscillation threshold was reached at a natural sunlight illumination of 60% on the top window. Calculations indicated that a solar-to-laser power-conversion efficiency could eventually reach 8%. Such an SPL has potential applications in long-term renewable-energy storage or decentralised power supplies for electric vehicles and Internet-of-Things devices.
关键词： luminescent solar collector,decentralised power supplies,renewable-energy storage,fully-planar,solar-pumped laser
更新于2025-09-23 15:21:01
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A chain is as strong as its weakest link – Stability study of MAPbI3 under light and temperature
摘要： The stability of perovskite solar cells is a key issue for industrial development. One reason for this is the volatile organic methylammonium (MA) cation, which is prone to degas under elevated temperatures from the perovskite. At the same time, small amounts of MA are used for practically all highest performing solar cells. These compositions have also shown relatively promising stabilities. This raises the question of MA stability with respect to different, application-dependent stability requirements. Interestingly, MA stability was mainly studied on thin films that differ from full devices or with architectures which are also prone to degrade. Therefore, the degradation behavior on complete MA containing devices with a relatively stable architecture is required to quantify the long-term stability of MA. This enables to determine at which timescales MA is unstable and which role it can play in future compositions. If MA is indeed unstable at much longer timescales than previously recorded, it also indicates that more severe degradation pathways are currently underappreciated. Here, “weakest link” MAPbI3 devices are used, i.e. showing promising stability: devices retained 100% of their initial efficiency over 1000 h of aging under constant illumination and maximum power point tracking at 20 °C. At elevated temperatures of 50 and 65 °C, the devices retained 100% and 90% of their initial efficiency after 500 h of illumination, respectively. Impressively, at 95 °C the MAPbI3 device retained 85% after 500 h under constant illumination of its initial efficiency, which is some of the best stability data reported to date for MA. Thus, MA-containing devices require further studying. Nevertheless to achieve the necessary industrial lifetimes of more than 25 years, the complete removal of MA is a sensible precaution to systematically avoid any long-term risk factors.
关键词： Electrocatalysis,Renewable energy,Metallic nanocrystals,Two-dimensional
更新于2025-09-23 15:21:01
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Sliding Mode Controller with Integral Action for DC-Link Voltage Control of Grid-Integrated Domestic Photovoltaic Systems
摘要： The grid integration of photovoltaic systems is preferred over the islanded mode of operation as the former does not require additional storage element, hence less maintenance and no chemical pollution. To regulate power exchange between the grid and the photovoltaic system, a robust DC-link voltage controller capable of withstanding the intermittent nature of solar energy and sudden variations in load is inevitable. A proportional–integral controller is used for DC-link voltage control, exhibiting oscillations during steady state and overshoot during transients. However, the conventional sliding mode controller reduces the overshoot at the expense of increased steady-state error. This paper proposes a robust sliding mode controller for DC-link voltage control to reduce steady-state error by incorporating integral action to the conventional sliding mode controller. The harmful effect of chattering phenomenon is minimised by limiting the error in the control variable using a signum function. The added features of the work include an incremental conductance method for obtaining maximum power from the photovoltaic system, instantaneous pq theory-based self-tuning ?lter for the extraction of fundamental component and inverter switching pulse generation using hysteresis current control technique. The grid-integrated photovoltaic system along with all features is modelled and simulated in MATLAB/Simulink platform. The results of numerical simulations carried out for various system conditions illustrate that the proposed controller provides superior performance when compared to proportional integral controller and conventional sliding mode controller in terms of harmonic compensation, power ?ow balance and speed of response at all system conditions.
关键词： PV system,Sliding mode control with integral action,Grid integration,Shunt active power ?lter,Renewable energy
更新于2025-09-23 15:21:01
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Short-Term Photovoltaic Power Forecasting Using a Convolutional Neural Networka??Salp Swarm Algorithm
摘要： The high utilization of renewable energy to manage climate change and provide green energy requires short-term photovoltaic (PV) power forecasting. In this paper, a novel forecasting strategy that combines a convolutional neural network (CNN) and a salp swarm algorithm (SSA) is proposed to forecast PV power output. First, the historical PV power data and associated weather information are classified into five weather types, such as rainy, heavy cloudy, cloudy, light cloudy and sunny. The CNN classification is then used to determine the prediction for the next day’s weather type. Five models of CNN regression are established to accommodate the prediction for different weather types. Each CNN regression is optimized using a salp swarm algorithm (SSA) to tune the best parameter. To evaluate the performance of the proposed method, comparisons were made to the SSA based support vector machine (SVM-SSA) and long short-term memory neural network (LSTM-SSA) methods. The proposed method was tested on a PV power generation system with a 500 kWp capacity located in south Taiwan. The results showed that the proposed CNN-SSA could accommodate the actual generation pattern better than the SVM-SSA and LSTM-SSA methods.
关键词： convolutional neural network,salp swarm algorithm,renewable energy,day ahead forecasting,PV power forecasting
更新于2025-09-23 15:21:01
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Energetic, economic, and environmental (3??E) performances of high concentrated photovoltaic large scale installations: Focus on spatial analysis of Morocco
摘要： Producing electricity from a renewable source is a major challenge in Morocco nowadays and high concentrated photovoltaic (HCPV) is becoming an attractive solution to ensure clean energy generation due to its high efficiency. The aim of this paper is to estimate the ? Energetic, economic, and environmental ? performances of large scale HCPV power plants in the major Moroccan climatic zones and to compare their feasibility to PV plants. The mathematical model for estimating the energetic, economic, and environmental performances of large scale HCPV plants is shown, sensitivity and comparison analysis are exhibited. Another goal of the paper is the optimization of the performances of the algorithm through the study of the effect of different parameters. Our major finding is that the large scale HCPV plants are more competitive than PV plants in Errachidia climatic zone where the (capacity factor, LCOE) take the values (26.07%,8.57c$/kWh). Moreover, the capacity factor of large scale HCPV power plants is the most sensitive to the temperature coefficient while the (LCOEnominal, LCOEreal, NPV) are the most sensitive to the analysis period. The quantity of CO2 mitigated reaches a maximal value in the Errachidia zone with 2.59 × 105 tons of carbon per year avoided, and the cost of carbon gained there is estimated to be 10.4 M$. Innovative GIS maps of energetic, economic, and environmental performances of large scale HCPV power plants for all Morocco are given.
关键词： Renewable energy,Parametric study,Comparison analysis,HCPV,Morocco
更新于2025-09-23 15:21:01
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Efficiency analysis of photovoltaic systems
摘要： The goal of the study was to analyse the efficiency of two existing photovoltaic micro-installations with the power of approx. 40 kWp. The main factor differing the two installations being analysed was the arrangement of modules in relation to the sides of the world, one is south-west and the other is east-west. The total yield of electrical energy in 2017 from the south-west installation was higher and amounted to 34980 kWh. For the east-west installation the amount of energy generated was equal to 31180 kWh. 4 methods of forecasting electrical energy yield were discussed. Simple computational method proved to be the best method for both installations.
关键词： photovoltaic systems,renewable energy,efficiency
更新于2025-09-23 15:21:01
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[IEEE 2018 Second International Conference on Computing Methodologies and Communication (ICCMC) - Erode (2018.2.15-2018.2.16)] 2018 Second International Conference on Computing Methodologies and Communication (ICCMC) - A STUDY ON MODELING AND SIMULATION OF PHOTOVOLTIC ARRAYS USING SINGLE DIODE METHOD
摘要： This paper presents a method of modeling and simulation of photovoltaic arrays. The main objective of this study is to achieve a circuit based simulation model of a photovoltaic cell and to scrutinize the results and compare them with respect to change in environmental parameters like irradiation and temperature. The proposed method of single diode model is implemented in MATLAB software based on the particular environmental condition. And on the basis of this study simulation results and ideal theoretical values are compared.
关键词： Renewable energy sources,MATLAB software,PV system,Single diode method,Open circuit current and short circuit voltage
更新于2025-09-23 15:21:01