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Neutral to Earth Voltage Analysis in Harmonic Polluted Distribution Networks with Multi- Grounded Neutrals

By G. Ahmadi and S. M. Shahrtash

Abstract

Abstract—A multiphase harmonic load flow algorithm is developed based on backward/forward sweep to examine the effects of various factors on the neutral to earth voltage (NEV), including unsymmetrical system configuration, load unbalance and harmonic injection. The proposed algorithm composes fundamental frequency and harmonic frequencies power flows. The algorithm and the associated models are tested on IEEE 13 bus system. The magnitude of NEV is investigated under various conditions of the number of grounding rods per feeder lengths, the grounding rods resistance and the grounding resistance of the in feeding source. Additionally, the harmonic injection of nonlinear loads has been considered and its influences on NEV under different conditions are shown

Topics: Distribution System, Multi-grounded, Backward/Forward Sweep, Harmonic Analysis
Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.193.360
Provided by: CiteSeerX
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