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[IEEE 2017 9th IEEE-GCC Conference and Exhibition (GCCCE) - Manama, Bahrain (2017.5.8-2017.5.11)] 2017 9th IEEE-GCC Conference and Exhibition (GCCCE) - Dual Unified Power Quality Conditioner Based on Open-Winding Transformers and Series Converters for Grid-Connected PV Systems
摘要： A new scheme for a grid connected photovoltaic system capable of enhancing power quality of a distribution system is presented in this paper. The proposed system is consisted of a dual unified power quality conditioner (D-UPQC) based on open-end winding (OEW) transformer and series connected converters. The D-UPQC is consisted of four series converters connected to the grid via two three-phase transformer with open-end winding on the converters side. The proposed scheme uses two PV arrays, each array feeds a separate dc-link of a two three phase voltage source converter (VSC). The structure, control and capability of the proposed configuration are discussed in this paper. The effectiveness of the proposed configuration has been verified through simulation studies using Simulink/Matlab.
关键词： photovoltaic,open end winding,voltage source converter,open end winding transformer,dual unified power quality conditioner
更新于2025-09-23 15:22:29
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LCO-FLL control for single-phase utility integrated single-stage solar PV system
摘要： This study presents a limit cycle oscillator-frequency locked loop (LCO-FLL) control for single-phase utility integrated single-stage photovoltaic (PV) system. The proposed topology increases the utility of the voltage-source converter (VSC), particularly in the absence of PV generation. It has the potential to load harmonics current mitigation. It estimates harmonic free load current accurately with low computational requirement due to the absence of cumbersome mathematical algorithm and transformation techniques. It provides reactive power compensation, both in the absence and the presence of PV generation, improves transient response during dynamics in load and varying irradiance conditions. The total harmonic distortions of utility current and utility voltage, compliance the limit of the IEEE-519 standard. The proportional–integral (PI) regulator regulates the DC-link voltage of VSC input to the reference DC-link voltage. The incremental conductance-based technique derives the reference DC-link voltage. The dynamic behaviour of the LCO-FLL-based control is improved using a feed-forward loop for the PV power sharing. It also reduces loading on the PI controller. Test results demonstrate satisfactory performance of LCO-FLL-based control.
关键词： single-stage solar PV system,LCO-FLL control,proportional–integral (PI) regulator,incremental conductance-based technique,feed-forward loop,reactive power compensation,voltage-source converter (VSC),IEEE-519 standard,single-phase utility
更新于2025-09-23 15:21:21
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[IEEE 2019 4th International Conference on Recent Trends on Electronics, Information, Communication & Technology (RTEICT) - Bangalore, India (2019.5.17-2019.5.18)] 2019 4th International Conference on Recent Trends on Electronics, Information, Communication & Technology (RTEICT) - Modeling and simulation of a Micro-grid connected with PV solar cell & its protection strategy
摘要： In the present day scenario due to change the rapid demand and over global climate change in increased the sustainable Distributed generation (DG) resources such as fuel , wind and solar. Society moving to the conventional resources like as solar, wind etc. To fill surplus demand need alternative sources like solar cell. It has a distinct concern in this scenario as it is pollution free, clean, unlimited and free. In this Paper we are design a micro-grid model by using PV cell with help of boot converter. This model is basically applicable in rural or islanded load system. Here we also discussing the operation of autonomous or grid connected microgrid model by using PV cell with help of Boost converter. PV model is completed by using MATLAB SIMULINK and different current Voltage and power levels. The MATLAB SIMULINK is done in island mode as well as grid-connected mode at the both end, grid end and load end. This study aims to understand the change of fault value Compared to healthy surgery that may serve as a cornerstone Selection of protection strategies that may work effectively both operating modes.
关键词： PV array,Distributed generation (DG),Boost converter,Relay,Voltage Source Converter (VSC),Maximum Power Point Tracking (MPPT)
更新于2025-09-23 15:21:01
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An Integration of Solar Photovoltaic Generation to Three-Phase Utility Using Adaptive Control Algorithm
摘要： This paper deals with the modified weighted least-mean square (LMS) control strategy for single-stage, solar photovoltaic (PV) grid-integrated system to enhance the power quality at common coupling point. This control algorithm has fast convergence, fewer oscillations, fast dynamic response, and good steady-state performance than the other LMS-based control algorithm. The incremental conductance-based maximum power point tracking technique is used to obtain the crest power from the PV array, which is used to sustain DC link voltage by proportional–integral controller. The fundamental component of load current is extracted using this proposed control technique to estimate the reference currents of grid. This proposed control algorithm addresses various power quality concerns such as harmonics reduction, power factor correction, and load unbalancing. The VSC of PV array-interfaced grid system feeds real power to the loads, and surfeit real power is injected into the distribution network. The dynamic performance of proposed single-stage PV-fed three-phase system is validated into the MATLAB\Simulink environment at nonlinear loads, and simulated results are validated with test results on an experimental prototype at different environmental conditions such as varying solar irradiation and load unbalancing. Test results are found satisfactory, and total harmonic distortions of grid currents are observed well within limits of the IEEE-519 standard.
关键词： LMS,Voltage source converter (VSC),Power quality,Distributed grid,Solar PV generation
更新于2025-09-23 15:21:01
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[IEEE 2018 11th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) - HangZhou, China (2018.9.5-2018.9.7)] 2018 11th UK-Europe-China Workshop on Millimeter Waves and Terahertz Technologies (UCMMT) - Linear-to-Circular Polarization Conversion For Beam-Scanning Antenna Based On Self-Complementary Metasurface
摘要： Modular multilevel converters (MMC) are presently the converter topology of choice for voltage-source converter high-voltage direct-current (VSC-HVDC) transmission schemes due to their very high efficiency. These converters are complex, yet fast and detailed electromagnetic transients simulation models are necessary for the research and development of these transmission schemes. Excellent work has been done in this area, though little objective comparison of the models proposed has yet been undertaken. This paper compares for the first time, the three leading techniques for producing detailed MMC VSC-HVDC models in terms of their accuracy and simulation speed for several typical simulation cases. In addition, an improved model is proposed which further improves the computational efficiency of one method. This paper concludes by presenting evidence-based recommendations for which detailed models are most suitable for which particular studies.
关键词： HVDC transmission,electromagnetic-transient (EMT) simulation,voltage-source converter (VSC),modular multilevel converter (MMC),Accelerated model
更新于2025-09-23 15:19:57
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Study on Topology and Control Strategy of High-Precision and Wide-Range Hybrid Converter for Photovoltaic Cell Simulator
摘要： Aiming at the function and technical requirements of high-power photovoltaic cell simulation, high-performance programmable logic power supply and dc motor simulation, a high frequency isolation hybrid topology and control strategy based on current-source/voltage-source converter was studied and proposed. Firstly, according to the performance requirements of photovoltaic cell analog power supply, the control strategy requirements of the high-precision wide-range hybrid topology were proposed. Secondly, the working principle of the new hybrid topology was analyzed. At the same time, the equivalent model of the new hybrid topology was simpli?ed and established, and the overall control strategy of the hybrid topology based on current compensation and sliding mode variable structure was proposed. Finally, simulation and experimental research on the hybrid topology was carried out, and the experimental test of photovoltaic cell simulation was completed. The simulation and experimental results show that the hybrid topology and control strategy proposed in this paper has the characteristics of wide-range output regulation, fast dynamic response, high ef?ciency and high power factor, and can be used for high performance photovoltaic cell simulation, programmable logic power supply and DC motor simulation.
关键词： current source converter,hybrid converter topology,space vector control,voltage source converter,sliding mode control
更新于2025-09-12 10:27:22
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Automatic Voltage Regulation of Grid Connected Photovoltaic System Using Lyapunov Based Sliding Mode Controller: A Finite — Time Approach
摘要： Importance of PV based energy systems cannot be denied with quickly increase in renewable energy demand. Due to inherent uncertainties and non-linear behaviour of grid tied PV system, conventional control strategies are unable to provide satisfactory performance. Therefore, key purpose of this paper is to design non linear controller for the control of grid tied PV system. A novel control strategy is devised by utilizing Lyapunov base ?nite time non-linear reactive power and dc link voltage control. This strategy employes Lyapunov approach to ensure stability and guarantees robustness. With this control strategy, better and superior performance is observed in comparison to proportional integral controller. Furthermore, simulation results are provided to illustrate the effectiveness of proposed algorithm. Various disturbances of system such as change in solar insolation level, change in reference parameters, faults on buses are considered. With this control strategy, settling time and oscillations are found signi?cantly less than PI controller.
关键词： Automatic voltage regulation,?nite time sliding mode controller,voltage source converter,point of common coupling
更新于2025-09-12 10:27:22
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[IEEE 2018 2nd International Conference on Trends in Electronics and Informatics (ICOEI) - Tirunelveli, India (2018.5.11-2018.5.12)] 2018 2nd International Conference on Trends in Electronics and Informatics (ICOEI) - Analysis of Active and Passive Method for Islanding Detection of 3-Phase Grid Connected PV System
摘要： The purpose of this paper is to detect islanding condition in three phase grid connected PV system by using islanding detection method. PV system has more momentum in power sector due to market deregulations and environmental issues. Islanding occurs when a portion of the distribution system becomes electrically isolate from the main generation and grid meet continues power by PV array system. so, it is very important requirement to interconnect a solar system to power grid and their the capability of the PV system to detect islanding detection. Anti-islanding methods generally can be classified into four major groups, which include passive methods, and communication base methods. Also, this paper is offer knowledge about PV array, DC-DC converter, voltage source converter in grid connected photovoltaic systems and explain one passive method and one active method for islanding detection of three phase grid connected PV system with MATLAB simulations and results.
关键词： boost converter,voltage source converter,PV array,islanding detection
更新于2025-09-04 15:30:14