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Categorized as one of the renewable energies, photovoltaic (PV) system has great potential due to the availability of the sun in most part of the world. This project proposes a high performance, single stage single phase inverter topology for grid connected PV systems. The proposed configuration converts the solar panel's dc power into high quality ac power for feeding into mains, while tracking maximum...
In a grid connected photovoltaic system, the main aim is to design an efficient solar inverter with higher efficiency and which also controls the power that the inverter injects into the grid. The effectiveness of the general PV system anticipate on the productivity by which the direct current of the solar module is changed over into alternating current. The fundamental requirement to interface the...
In PV strings, a number of PV modules are connected in series where the same current passes over all of them. To allow the maximum power points of the PV modules to be tracked individually, DC/DC converter known as optimizers could be used to interface each PV module with string. Processing the entire PV power by the optimizers increases the cost and degrades the system efficiency. In this paper,...
With a still increase of grid-connected Photovoltaic (PV) systems, challenges have been imposed on the grid due to the continuous injection of a large amount of fluctuating PV power, like overloading the grid infrastructure (e.g., transformers) during peak power production periods. Hence, advanced active power control methods are required. As a cost-effective solution to avoid overloading, a Constant...
The objective of this study was to develop a microinverter for solar power conversion systems for converting dc voltage generated by solar cells at varying voltage levels into single-phase ac power with constant voltage and constant frequency. This study proposes coupled inductors and double-boost topology architecture for maintaining a stable voltage on the output side and reducing the size and cost...
For the independent DC link voltage control of the single phase cascaded multilevel PV inverter, this paper proposes an improved control strategy that consists only one total voltage loop and n feed-forward-based weighting factors. Actually, the multiple modulation signals have predictable ratios with each other because the series connection of the outputs of the H-bridges. Utilizing this feature,...
Dynamic behavior of solar energy resource entails the need of robust controllers that can converge to the maximum power point (MPP) to maximize energy harvest. This paper explores an improved Perturb and Observe (P&O) technique that combines a fixed step model predictive controller (MPC), to speed up the control loop, applied to a boost converter. The proposed MPC Maximum Power Point Tracking...
The major drawback of the two switch flyback topology is its low-power applications such as microinverter. This study proposes a high-power two-switch flyback inverter and shows its excellent performance as a string-type PV inverter. The suggested inverter system is based on interleaving technique and operated in discontinuous conduction mode. Moreover, a fast and robust maximum power point tracking...
This paper presents a Model Predictive Control (MPC) for grid-tied Packed U Cells (PUC) multilevel inverter. The system under study consists of a single-phase 3-cell PUC inverter connected to the grid through filtering inductor. The proposed topology allows the generation of 7-level output voltage with reduction of passive and active components compared to the conventional multilevel inverters. The...
This paper presents a maximum power point tracking (MPPT) method using model predictive technique for a grid-tied photovoltaic harvesting energy system. A single-stage grid-tied Z-source inverter is used for extracting the maximum available power and feeding the power to the grid. The proposed technique predicts the future behavior of the photovoltaic side voltage and current by using a digital observer...
Use of non-conventional energy resources these days has led to think about utilizing the power electronic interfaces to integrate them with the conventional power sources. Around the world, conventional power systems are facing problems with gradual depletion of fossil fuel resources and environmental pollution. These problems have led to a new trend of generating power locally at distribution voltage...
This paper proposes a multi-objective SPV (Solar Photovoltaic) system integrated to 3P4W (Three Phase Four Wire) distribution network by using DMSI (Digital Multistage Interpolation) based technique. In addition to the power exchange from SPV to the 3P4W grid, a 4-leg VSC (Voltage Source Converter) is used as a power conditioning unit, therefore, it is named as multi-objective. For good utilization...
The main aim of this paper is to integrate the solar photovoltaic system to the grid by using Marx multilevel inverter. The Marx multilevel inverter gives several levels of dc voltages to the desirable ac voltage. Theoretically, the number of voltage levels is arbitrarily chosen in Marx multilevel inverter, without using of transformer the output voltage of the inverter can reach high level. In addition,...
A multiphase interleaved boost converter with photovoltaic module using Maximum Power Point Tracking (MPPT) technique is the primary objective of this paper. Hence at the beginning, the PV module is analyzed in MATLAB using SIMULINK software. In this project, simulation& design of a close loop three phase inverter in MATLAB SIMULINK platform is also presented. That is also a part of PV grid connected...
In this paper, a control scheme for tracking maximum power point for a solar photovoltaic (PV) panel feeding power to the three phase grid through an intermediate boost converter followed by a grid-tie PWM inverter stage is presented. The intermediate DC to DC boost converter small signal model is derived considering the fact that its output behaves as a constant DC voltage power sink. The selection...
The paper presents the controller structure of high performance, double-stage three phase grid connected solar photovoltaic (PV) system with maximum power point tracking (MPPT). In, the proposed configuration, the solar energy, after MPPT tracking, is finally channeled into a three phase AC grid by first boosting up the DC voltage level and then converting the boosted DC voltage into three-phase AC...
The power generated by a solar photovoltaic panel depends strongly on atmospheric conditions. In fact, a grid connected system requests a good response for variations in the solar irradiance and temperature. Under partially shaded conditions, the PV array characteristics will be more complicated via multiple maxima in the P-V and I-V characteristics. In this paper, a maximum power point tracking algorithm...
This paper proposes a new converter-inverter drive system for photovoltaic water pumping without the use of Battery. The converter is designed to drive a 3 phase drives like PMSM, Induction Motor directly from PV energy. This converter is mainly used for water pumping purposes in areas where electrical power is unavailable. Use of photovoltaic energy is one of the solution for this problem. It proposes...
This paper presents the modeling and simulation of a 100 kWp Photovoltaic Power System installed and operating at G. Narayanamma Institute of Technology & Science since March 2014. The utility grid-connected 100 kWp PV system comprises of PV arrays installed on the rooftop terraces of two buildings in the college connected through five 20 kW inverters to the LT distribution panels in the two buildings...
In this work the AC Load is fed from solar radiation energy by means of Three-level Diode-Clamped Inverter. The entire system is implemented with three phase supply system. For making the system more efficient, Maximum Power Point Tracking (MPPT) device is used. The Perturb & Observe technique is adopted to obtain voltage at maximum power. In this paper, Space Vector Pulse Width Modulation (SVPWM)...
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