Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Interconnection of wind-solar hybrid Renewable Energy source to the 3 phase-3 wire distribution system along with power quality improvements at the grid side(Institute of Electrical and Electronics Engineers Inc., 2015) Gururaj, M.V.; Vinatha Urundady, U.; Jayasankar, V.N.Scarcity of power has been one of the nightmare issues for mankind in the modern age. Renewable Energy Sources (RES) working parallel with conventional power plants are playing a lead role in narrowing the difference between supply and demand. Among all the available renewable energy sources wind-solar hybrid systems are the most popular one. Due to their natural advantage of being complimentary to each other, they are assuring reliability to the utility. Power quality issues arising due to the usage of non-linear loads at the point of common coupling are addressed with the help of power electronic device interfacing RES to the grid. The work presented in this paper consists of Modeling and Simulation of wind-solar hybrid energy system and interfacing it to the grid through the interfacing inverter. A suitable control strategy which will add shunt active filter functionality to the RES interfacing device to the grid is also undertaken. © 2015 IEEE.Item Implementation of adaptive fuzzy controller in a grid connected wind-solar hybrid energy system with power quality improvement features(Institute of Electrical and Electronics Engineers Inc., 2016) Jayasankar, V.N.; Vinatha Urundady, U.Energy demand increases rapidly, utilization of renewable energy resources plays an important role in narrowing down the supply-demand difference. Introduction of more power electronic devices and non-linear loads pollutes the grid and create power quality problems. Both the scarcity of energy problem and power quality problem can be simultaneously solved by using the grid interfacing inverter of renewable sources, as a shunt active filter. A suitable control strategy has to be used for giving grid interfacing inverter, the power of power quality improvement. Conventional PI controller can be replaced with a fuzzy controller for better control, and thus improve the system performance. In this paper, a grid connected hybrid system of wind-solar with power quality improvement features is simulated with a PI controller, and then results are compared by replacing PI with fuzzy controller. © 2016 IEEE.Item Real and reactive power control of solar grid-tie inverter under distorted grid conditions(Institute of Electrical and Electronics Engineers Inc., 2018) Damodaran, R.; Ramana, V.V.; Balasubramanian, B.; Mishra, S.Due to increasing density of integration of distributed generation systems (DGS) to the utility grid, continuous power supply from DGS is being considered desirable during temporary grid faults, to provide support to the grid under conditions like voltage sags. Researchers have been focusing on improved topologies and control strategies in order to enhance the performance of solar grid-tied inverters, especially during grid faults. This paper presents a simple yet accurate control strategy for three-level four-wire grid-tie inverters for real and reactive power injection which operates satisfactorily under distorted grid conditions. Independent control of the input and output side is obtained by using two-stages, with boost converter obtaining maximum power from the solar panels, and inverter injecting this power into the grid with grid standards being met. A DC link balancing technique using proportional controller is also presented. A three-level neutral point clamped grid-tie inverter with the proposed control is modeled in MATLAB-Simulink platform and its effectiveness, in terms of accuracy of operation under non-ideal grid conditions and reduction in total harmonic distortion, is validated using the simulation results. © 2018 IEEE.