Modified Power Compensation Control Strategy of Three-Phase Grid-Connected Inverter under Unbalanced Grid Voltage Conditions

Abstract:

Control strategy under unbalanced grid voltage conditions is one of the most important issues for grid-connected inverter. Under unbalanced grid voltage conditions, the 2^nd active and reactive power ripples generate, they pollute the grid. To meet the demands of IEEE Std.929-2000, this paper proposed a modified power compensation control strategy; the proposed solution is based on direct power control. To provide accurate compensating power, the power model of three-phase inverter under unbalanced grid voltage conditions is given, using the positive sequence current component and the negative sequence voltage component, the compensating powers are calculated in details. Theoretical analysis and comparative simulation verification are presented to demonstrate the effectiveness of the proposed control strategy.

• Periodical: Applied Mechanics and Materials (Volume 740)
• Pages: 335-338
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.740.335
• Online since: March 2015
• Authors: Shao Hua Sun*, Hong Qi Ben
• Keywords: Direct Power Control, Grid-Connected Inverter, Power Compensation, Power Model, Unbalanced Grid Voltage Conditions

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