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Kalman Filtering Technique for Rooftop-PV System under Abnormal Grid Conditions
摘要： This paper presents a robust extended complex Kalman Filter (RECKF) based control for multifunctional double stage grid-connected solar photovoltaic array (SPVA) system. The main contributions of presented paper, include: 1) real power generation from SPVA fulfils the requirement of the connected loads and it provides the surplus power to the distribution network, 2) it behaves as a distribution static compensator, which performs various functionalities such as grid currents balancing, harmonics mitigation, unity power factor operation, 3) it is capable to operate under polluted grid scenarios such as under voltage, over voltage and imbalanced grid voltages. The SPVA feed-forward term is incorporated in the control technique to enhance the dynamic response of the system. The real coded particle swarm optimization (RCPSO) based metaheuristic approach is used for optimal tuning of the DC link voltage PI (Proportional Integral) controller. Simulation results illustrate the effectiveness of presented control algorithm under variations in point of common coupling (PCC) voltage. Test results illustrate the behaviour of grid-connected SPVA system subjected to various perturbations such as under voltages, over voltages, distorted and imbalanced grid voltages etc. The THDs (Total Harmonic Distortions) of grid currents are achieved well within recommended limits.
关键词： Power quality,Renewable energy,Solar photovoltaic array,Harmonics,VSC,Optimization
更新于2025-09-23 15:23:52
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Grid Interactive Single Stage Solar Powered Water Pumping System Utilizing Improved Control Technique
摘要： This paper proposes a single stage grid interactive solar powered switched reluctance motor (SRM) driven water pumping system with an efficient control technique. The control of proposed system provides the proficient maximum power point technique (MPPT) tracking and motor drive control with bidirectional power flow between the photovoltaic (PV) array and single phase grid. It has harmonics components elimination, improved dynamic performance and a DC offset rejection capability compared to other control. A PV feed-forward term is also incorporated in developed control to enhance the dynamic performance of the system and to minimize the size of DC link capacitor with improved MPPT performance. The novel scheme of fundamental switching of SRM drive over its maximum operational time (when the grid is present) makes system efficient and reliable. An improved perturb and observe (P&O) based maximum power point tracking (MPPT) algorithm is used in this system to minimize the undesirable losses in a PV array specially under varying insolation levels. The proposed control is tested on a developed prototype and its suitability is authenticated through simulated and test results under various conditions.
关键词： MPPT,Bidirectional Power Flow,Water Pump,Switched Reluctance Motor,VSC,PV Array,Power Quality
更新于2025-09-23 15:23:52
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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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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 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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[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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[IEEE 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) - Shenzhen, China (2018.11.4-2018.11.7)] 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) - Overview on VSC-HVDC Systems Based on PV
摘要： As a result of the rapid development of DC charging and the extensive use of electronic devices, the number of DC loads has increased dramatically. Loads have the characteristics of AC and DC coexist. At the same time, there are many distributed power sources in microgrids, such as PV, wind power generation, and so on. With natural DC properties, some new energy power generation forms such as PV can not only be able to achieve direct current conversion and transmission at the power generation side, but also be directly applied to DC loads and inverted at the load side for AC loads. In this way, energy losses during converting will be reduced and the structure of the power system will be simplified. In addition, it can enhance the absorption of new energy and realize the demand of diversified power supply. VSC-HVDC is the best way to solve this problem. Focusing on the flexible substation of the Alibaba Data @Hub in Zhang Bei, China, this paper describes the construction and working principle of a VSC-HVDC power transmission and distribution system based on photovoltaic power generation. Accordingly, the necessity of flexible DC multi-terminal (MTDC) transmission technology is proposed.
关键词： VSC-MTDC,VSC-HVDC,DC/AC,multi-functional power electronic transformers,PV
更新于2025-09-19 17:15:36
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[IEEE 2019 IEEE 1st International Conference on Energy, Systems and Information Processing (ICESIP) - Chennai, India (2019.7.4-2019.7.6)] 2019 IEEE 1st International Conference on Energy, Systems and Information Processing (ICESIP) - Multifunctional VSC Controlled Solar Photovoltaic System with Active Power Sharing and Power Quality (PQ) Improvement Features
摘要： This paper presents a multifunctional voltage sourced-converter (VSC) controlled solar photovoltaic (SPV) system with a generalized ‘dq’ and adaptive PLL-based include approach to extract the dual features. These enhanced active power sharing feature based on the availability of active power at DC-side collector bus while also serving as an active harmonic filter (AHF). The presented control is computationally less intensive and easy to formulate compared to its conventional counterpart like synchronous reference frame theory (SRFT). The objective of this work is to effectively extract the various ancillary services offered by multifunctional VSC in the power distribution system. The primary function of any grid- connected inverter (GCI) is to serve the active power demand of the load connected at the point of interconnection (PoI) in the power distribution network. However, the multifunctional VSC with presented control approach can also be utilized as AHF to attenuate the rich harmonic content present in source current, to mitigate the load reactive current demand, and to adequately supply the zero sequences harmonic component requirement of the unbalanced and nonlinear load by the fourth leg of the multifunctional VSC. Additionally, the proposed system typically ensures the unity power factor (UPF) operation. An incremental conductance (IC) based control technique is employed to optimize and continuously track the maximum intermittency. The power point usefulness of is demonstrated through transient test cases, conducted in the MATLAB/Simulink software environment. Additionally, its practicality is validated through a comprehensive set of experimental studies investigated on a laboratory developed prototype.
关键词： active harmonic filter,Multifunctional VSC,unity power factor operation,power quality improvement,grid-connected SPV system,renewable energy sources
更新于2025-09-16 10:30:52
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[IEEE 2017 14th IEEE India Council International Conference (INDICON) - Roorkee (2017.12.15-2017.12.17)] 2017 14th IEEE India Council International Conference (INDICON) - A Correntropy Based Control Algorithm for a Single-Phase Double Stage Grid Integrated Solar PV System
摘要： This paper presents the implementation of a double stage solar photovoltaic (PV) single phase grid connected system using correntropy based control algorithm. This algorithm helps to obtain sinusoidal grid currents even in the presence of nonlinear loads connected at PCC (Point Of Common Coupling), thus improving the power quality of the system. It has almost no steady state error as well as strong filtering ability. The proposed system is configured using a solar PV array, a single phase grid, a voltage source converter (VSC), a DC link capacitor, a boost converter, a ripple filter, an interfacing inductor and the nonlinear loads. The boost converter extracts maximum power from the solar PV array using the drift free MPPT (Maximum Power Point Tracking) method. A prototype is developed to affirm the system performance by testing it under various conditions. The grid conditions of the system obtained after the application of this control strategy conforms well to the harmonic standard IEEE 519.
关键词： Correntropy,MPPT,power quality,VSC,solar PV array
更新于2025-09-10 09:29:36
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Robust EnKF with Improved RCGA based Control for Solar Energy Conversion Systems
摘要： The robust ensemble Kalman filter (EnKF) based control is proposed for multifunctional three phase grid-connected solar energy conversion system with distribution static compensator (DSTATCOM) abilities. The robust EnKF based control facilitates the various functionalities of power quality (PQ) enhancement of the distribution grid such as grid currents balancing, harmonics current mitigation and unity power factor. The improved real coded genetic algorithm (RCGA) based metaheuristic approach is used to tune the proportional integral (PI) controller of the DC link voltage. Simulation results comparative dynamic performance, which demonstrates that the robust EnKF exhibits superior response as compared to state of the art techniques. The relative computational complexity of the proposed robust EnKF algorithm is analyzed with conventional stochastic filters such as Kalman filter (KF) and extended Kalman filter (EKF). To substantiate the proposed control, a prototype is realised in the laboratory and test results demonstrate satisfactory response of the grid-connected system subjected to various dynamic scenarios such as load currents imbalancing, harmonics compensation, imbalanced grid voltages, under voltage and over voltage. The response of grid currents are achieved within the IEEE-519, 1564 and 1159 standards.
关键词： DSTATCOM,MPPT,Power Quality,Harmonics,VSC,EnKF
更新于2025-09-04 15:30:14