Dual-Modulator Compensation Technique for Parallel Inverters Using Space-Vector Modulation
Tsung-Po Chen
Industrial Electronics, IEEE Transactions on
Volume 56, Issue 8, Aug. 2009 Page(s):3004 - 3012
Digital Object Identifier   10.1109/TIE.2009.2022515
Summary:In common dc-link parallel-inverter systems, the amplitudes and the phase angles of three-phase inverters can be separately adjusted to control power sharing. However, when the space-vector modulation technique is used in a parallel-inverter system without the output transformers, the zero-sequence circulating current will occur. This paper provides detailed analysis of the zero-sequence circulating current and proposes a novel dual-modulator compensation technique for eliminating the zero-sequence circulating current caused by power-sharing control systems. Results obtained from both simulation and experiments confirmed the performance and the effectiveness of the proposed compensation method.

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