Abstract

Computer planning and simulation of power systems requires system components to be represented mathematically. A method for building a dynamic phasor model of an Interline Dynamic Voltage Restorer (IDVR) is presented, and the resulting model is tested in a simple radial distribution system. Mathematical analysis is carried out for each individual component of the IDVR as modular models, which are then aggregated to generate the final model. The proposed technique has the advantage of simplifying the modelling of any flexible AC transmission system (FACTS) device in dynamic phasor mode when compared to other modelling techniques reported in the literature. The IDVR, including the series injection transformer, is analysed in both ABC and DQ dynamic phasor modes, and IDVR power management is also presented. To ensure compatibility with transient stability programs, the analysis is performed for the fundamental frequency only, with other frequency components being truncated and without considering harmonics. Results produced by the IDVR dynamic phasor model are validated by comparison with results gained from a detailed MATLAB/Simulink IDVR model.

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