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It is acknowledged that Distributed Generation, in spite of the benefits that it provides, causes harmonics problems due to the power converter interfaces. In this paper, a generic approach is adopted to reduce the harmonic injection from converter-connected DG units, using a phase-shifting technique. By changing the vector group between transformers that connect with either converter-connected DG or non-linear loads is operated off-line for a self-harmonic cancellation, without modifying the existing converter unit. The case study is based on the typical 17 bus, Dutch medium voltage (MV) network implemented in DIgSILENT PowerFactory.
PowerTech, 2011 IEEE Trondheim
Date of Conference: 19-23 June 2011