Modeling And Simulation Of Grid Connected Inverter For Power Quality Enhancement By Using Cascaded CurrentVoltage Control Strategy
Journal Title: International Journal of Science Engineering and Advance Technology - Year 2015, Vol 3, Issue 1
Abstract
This paper is presenting, a cascaded current– voltage control strategy which is proposed for inverters to concurrently get better the power quality of the inverter local load voltage and the current exchanged with the grid. It also enables faultless transfer of the operation mode from stand-alone mode to gridconnected mode or vice versa. The control proposal includes an inner voltage loop and an outer current loop, with both controllers designed using the fuzzy logic control and H∞ repetitive control strategy. This leads to a very low total harmonic distortion in both the inverter local load voltage and the current exchanged with the grid at the same time. The proposed control strategy can be used to single-phase inverters and also for three-phase four-wire inverters. The balanced clean currents can be injected into grid, incase of grid connected inverters, even though these inverters have local loads(if any),which are unbalanced and/or nonlinear. Simulation under different scenarios, with comparisons made to the current repetitive controller replaced with a current proportional–resonant controller, is presented to demonstrate the excellent performance of the proposed system.
Authors and Affiliations
D Vishnu Vardhan Reddy| PG Student [PS], Dept. of EEE, GCET, Kadapa, Andhra Pradesh, India, Mrs. M Rama Subbamma| Professor & D.O.A, Dept of EEE, GCET, Kadapa, Andhra Pradesh, India
Keywords
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