Reseach on Control Strategy Based on p-q-r Theory for Four-Leg Grid-Connected Inverter

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Abstract:

The mathematical model for three-phase four-leg grid-connected inverter is modeled by the simplified p-q-r theory. The control strategy is proposed based on the characteristic of controlled variables. PI algorithm is adopted for variables of p axis and q axis, and PR algorithm is adopted for variable of r axis. The full design and analysis of the proposed control algorithms are given in this paper. Simulation results and experimental result show that quality of four-leg grid-connected inverter output current is higher, and effectiveness of the proposed control strategies is validated by all results.

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Periodical:

Advanced Materials Research (Volumes 433-440)

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1099-1105

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January 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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