FOUR{{LEGGED ACTIVE POWER FILTER COMPENSATION FOR A UTILITY DISTRIBUTION SYSTEM

This paper presents a four-leg static converter to balance a three-phase four wire utility distribution system. The balancing strategy is based on a four-legged power converter used to provide a path for the neutral current due to an unbalanced load. The compensating technique uses a three-dimensional space vector modulation in the - - coordinate system. To validate the proposed approach, simulation results are presented and discussed. K e y w o r d s: three-phase-four wire, active lter, harmonics, three dimension, space vector modulation

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