- 标题
- 摘要
- 关键词
- 实验方案
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Grid Connected-Photovoltaic System (GC-PVS): Issues and Challenges
摘要： Smart grid is the key technology for an effective utilization of the Renewable Energy Sources (RES). The utilization of RES for the generation of electricity is increasingly gaining interest of researchers during the last decades. The main reason behind this is global incentivization, the increasing price of petroleum products, climate issues and deregulations in the energy market. As the Government of India, (MNRE i.e. Ministry of New & Renewable Energy) is targeting to generate 20000 MW power through grid-connected solar PVS by the year 2022 therefore, the main focus in this paper has been presented on power generation through grid-connected PVS. The emerging smart grid technology has enabled the grid-connected PVS as an evolving process in today’s world for electrical power generation. However, apart from so many advantages, there are several issues and challenges associated with the integration of PVS to the electric utility grid hence, the investigation to find out available possible solutions to overcome these issues becomes essential in order to enhance the performance of grid-connected PVS. The most severe constraint associated with this emerging technology is it high penetration level. If during low load conditions there is some mismatch found between the real power output and the load profile characteristics of PVS then it may result into large reverse power flow, high power losses or severe voltage violation. In this paper, several issues and challenges associated with the integration of solar PVS with the electric utility grid are presented.
关键词： Renewable Energy Sources,Grid Connected-Photovoltaic System,harmonics,voltage stability,RES,frequency stability,smart grid,GC-PVS
更新于2025-09-11 14:15:04
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Solar Photovoltaic Array Reconfiguration using Magic Su-Do-Ku algorithm for Maximum Power Production under Partial Shading Conditions
摘要： Power generation using photovoltaic (PV) array diminishes during shading. Under the conditions, the solar PV modules are exposed to dissimilar solar irradiation. The power vs voltage curve and current vs voltage curve of such PV array consist of multiple peaks in its characteristics and consequently the mismatch losses occur. This paper explores the power enhancement in PV array, which is exposed to partial shading conditions, through Magic Su-Do-Ku based static reconfiguration. The previous suggested static reconfiguration strategies attain poor power enhancement due to ineffectual shade dispersion. This proposed Magic Su-Do-Ku based interconnection arrangement overcomes these drawbacks to attain uniform shadow dispersion without altering the Total-Cross-Tied (TCT) connections. The power enhancement of the PV array has been analyzed through its P-V characteristics, mismatch loss, and effect of shade dispersion on its maximum power point (MPP) with different shading patterns. The performance of suggested arrangement shows good results for various shading patterns.
关键词： Magic Su-Do-Ku pattern,Mismatch losses,Solar Photovoltaic system,Static reconfiguration,Partial shading
更新于2025-09-11 14:15:04
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[IEEE 2019 Chinese Control And Decision Conference (CCDC) - Nanchang, China (2019.6.3-2019.6.5)] 2019 Chinese Control And Decision Conference (CCDC) - A Photovoltaic MPPT Control Strategy Based on Gradient Optimization and MPP Voltage Law
摘要： In this work, a maximum power point tracking (MPPT) control algorithm is developed to determine power efficiency, and to improve the transient nature of the power curve characteristics of a PV cell. Based on the analysis of existing MPPT methods, for PV systems, the relationship between MPP voltage and the open circuit voltage of PV cell under different conditions is studied; moreover, a novel MPPT control strategy which can be applied to different irradiance conditions based on a sub-domain gradient optimization principle and MPP voltage law is proposed. Simulation results show that the proposed method has advantages of fast dynamic response and a non-oscillatory steady state response under different irradiance conditions and input waveforms. For the experimental setup, an existing control method and the proposed MPPT control algorithm are implemented on solar PV cell; it was observed that the proposed MPPT algorithm has stable steady state dynamic characteristics and a fast response speed.
关键词： MPPT,photovoltaic system,voltage law,gradient optimization
更新于2025-09-11 14:15:04
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[IEEE 2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER) - Monte-Carlo, Monaco (2019.5.8-2019.5.10)] 2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER) - Modelling and Optimal Sizing of Photovoltaic Water Pumping Systems – Sensitivity Analysis
摘要： Recently we have developed a model of photovoltaic water pumping systems (PVWPS) for domestic water access in poor rural areas. In this article, we perform a sensitivity analysis over the 14 parameters of this model. We study how the variation of the parameters value influences the model output and the optimal sizing obtained from the model, for both the dry and the wet season. Results indicate that the peak power of the photovoltaic modules, the efficiency of the motor-pump and the tank volume have the highest impact on the model output. Besides, the parameters which significantly influence the optimal sizing are the position of the water entry in the tank, the position of the stop level of the float switch, the distance between the stop and restart levels of the float switch, the height between the floor and the bottom of the tank, and the static water level in the borehole. Finally, the thermal parameters of the PV modules and the hydraulic losses have a small impact on the model output and on the optimal sizing. This study can be useful to companies, governments and non-governmental organizations which install PVWPS for domestic water access. It can help them to determine the accuracy at which a given parameter has to be known to correctly model or size these systems. It can also allow them to evaluate the robustness of PVWPS sizing to parameters variation with time. Finally, it may guide the choice of components made by PVWPS installers.
关键词： Photovoltaic system,Water Pumping,Seasonality,Optimization,Sensitivity analysis
更新于2025-09-11 14:15:04
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Intelligent approach-based hybrid control algorithm for integration of solar photovoltaic system in smart grid environment
摘要： Integration of solar PV as a distributed generator (DG) require efficient and coordinated control measures for the proper synchronization. In this paper, a hybrid control algorithm for single stage solar photovoltaic (PV) system integrated with low voltage (LV)/medium voltage (MV) grid is proposed. The hybrid algorithm utilizes I cos ? technique and quasi-Newton back-propagation (QNBP) neural network (NN). The main contributions of the present work are: i) support the utility grid by feeding power and connected loads, ii) provide harmonics elimination, reactive power compensation, load balancing, iii) also works in power factor correction (PFC) and zero voltage regulation modes, iv) provides power quality improvement. The proposed control of grid tied PV system provides very fast response during static and dynamic conditions. The obtained results are compared with other well-established algorithms available in the literature. The comparison of the proposed algorithm is done on the basis of various parameters such as DC voltage undershoot and overshoot, settling time and THD in grid currents. The developed system is demonstrated in MATLAB/SIMULINK platform. Using the proposed algorithms there is significant improvement of 1.1% in total harmonic distortion (THD) of source current. The results of proposed controllers are experimentally validated on a developed laboratory protype.
关键词： hybrid control algorithm,power quality improvement,quasi-Newton back-propagation neural network,smart grid,solar photovoltaic system
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) - Photovoltaic system simulation model for steady-state microgrid energy management application
摘要： The high penetration of Distributed Energy Resources (DERs) creates the necessity of having mathematic models that can accurately represent the variable and intermittent nature of its resources, which are normally based on renewable energy such as photovoltaic systems. Since the DERs are located near the consumer, at the distribution side of the network, it creates a challenge in the operation and control of the distribution system. This challenge can be addressed by microgrids, which are the new paradigm for defining the operation of the distribution system with high penetration of DERs. This paper presents a photovoltaic simulation model which can analyze the photovoltaic system response to particular weather condition. The model can be applied in a steady-state microgrid energy management system. The model was simulated, and the results were analyzed. Different cases were applied, and the results were high satisfactory in comparison with the ones presented in the literature.
关键词： steady state,energy management,Photovoltaic system,mathematic model,microgrid
更新于2025-09-11 14:15:04
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[IEEE 2019 Chinese Control And Decision Conference (CCDC) - Nanchang, China (2019.6.3-2019.6.5)] 2019 Chinese Control And Decision Conference (CCDC) - Design and Simulation of Solar Photovoltaic Directional Tracking Device
摘要： With the rapid development of solar photovoltaic systems, the application and demand for solar tracking systems are growing accordingly. This paper, from an astronomical point of view, analyses movement of the sun and designs an integrated device for solar photovoltaic directional tracking based on the general formulas of solar declination, time angle, azimuth, and elevation angle. To improve tracking accuracy and efficiency, the device is designed by using a double-degree-of-freedom tracking system, so that it can track the sun in both horizontal and vertical directions. Besides, a hybrid tracking mode is applied to achieve accurate tracking of the sun movement, in which the solar trajectory tracking is used as the primary mode, while the photoelectric monitoring is taken as a supplementary, to improve the accuracy and stability of the algorithm. The results from the simulation carried out by Proteus software reveals that the device as well as the control system both operate in a stable and reliable manner, during which, the solar panel is perpendicular to the sun's direct rays within an acceptable range of deviation, realizing the automatic tracking of the sun's rays all the time, which significantly improves the receiving efficiency of solar energy.
关键词： Solar Tracking,Photovoltaic system,Solar trajectory tracking,Directional tracking device
更新于2025-09-11 14:15:04
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[IEEE 2018 2nd European Conference on Electrical Engineering and Computer Science (EECS) - Bern, Switzerland (2018.12.20-2018.12.22)] 2018 2nd European Conference on Electrical Engineering and Computer Science (EECS) - Maximum Power Point Tracking Algorithm Implementation for a Photovoltaic Panel Using Model Predictive Control
摘要： The present investigation proposes a mathematical model of a solar panel, based on a Predictive Control by Model that will allow to use information with a prediction horizon, to advance the possible actions to be taken and ensure that the solar panel delivers during its operation, the highest potential. The alternative discussed in this document is presented with examples and comparisons so that in this way the reader has the ability to choose the most optimal type of control for their functionalities and features.
关键词： photovoltaic system,Monitoring of the maximum power point,predictive control by model,generalized predictive control
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE Industry Applications Society Annual Meeting - Baltimore, MD, USA (2019.9.29-2019.10.3)] 2019 IEEE Industry Applications Society Annual Meeting - Control of Single Phase Solar Photovoltaic Supply System
摘要： This work deals with the modified multilayer fifth order generalized integrator (MLFOGI) based grid tied single phase solar photovoltaic (PV) system employing fuzzy logic control (FLC) based maximum power point tracking (MPPT) algorithms. The MLFOGI is used to extract the fundamental component of grid voltage under polluted grid due to voltage sag, swell, harmonics, frequency variations and dc offsets. The FLC based MPPT is capable to extract optimum energy under change in weather conditions. It offers fast dynamic response under reduced PV voltage oscillation. The proposed system is developed on MATLAB 2018a and obtained results shows the feasibility of system control and Total Harmonics Distortions (THDs) of grid current are in acceptable limits as per IEEE-519 standard.
关键词： Multilayer Fifth Order Generalized Integrator (MLFOGI),Maximum Power Point Tracing (MPPT),Fuzzy Logic Control (FLC),Voltage Source Inverter (VSI),Solar Photovoltaic System (SPV)
更新于2025-09-11 14:15:04
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Suppression strategy of short-term and long-term environmental disturbances for maritime photovoltaic system
摘要： The maritime photovoltaic system is easily affected by the special environmental disturbances from the ship and the sea, e.g., the partial and dynamic shadings when moved with a ship, the corrosion of photovoltaic module when continuously worked in high salinity oceanic environment. In this study, the optimal configuration of photovoltaic array installed on large ocean-going ship is developed, and a novel offline/online hybrid maximum power point tracking method is presented to suppress the short-term disturbance caused by the partial and dynamic shadings. Then, in order to dynamically track the corrosion of photovoltaic module and suppress the long-term disturbance, the dynamic knowledge-base with time-window is developed. Finally, the proposed methodology is verified by simulation experiments. Experimental results show that in the proposed configuration, location of the maximum power point is closely related to the area and degree of the shading, but is irrelevant to the distribution. Moreover, according to the experimental results, the operation data in the nearest 3 months to 1 year can be collected and employed to train the offline model, in order to obtain the best control performance. With the proposed configuration and control methodology, the environmental disturbances can be efficiently suppressed, the evaluated system can also obtain efficient and robust control performance under complex maritime environment.
关键词： Environmental disturbance,Maximum power point tracking,Maritime photovoltaic system,Green ship
更新于2025-09-11 14:15:04