Mathematical model for real-time assessment of contributions of disturbing sources to power quality level at a Point of Common Coupling

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Abstract
The presented paper describes the generalized mathematical model for the real-time assessment of contributions of disturbing sources (DSs) to voltage unbalance and slow voltage variation at a Point of Common Coupling (PCC). This model is intended to be the basis for a distributed and time-synchronized PQ measuring system. The model was developed on the basis of the node voltage method by using phasors of actual state parameter. DSs are assumed to be randomly distributed throughout the considering network. The simulation verification has demonstrated adequate results.

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