Grid integration of renewable energy based distributed energy resources (DERs) through pulse-width modulated (PWM) grid-tie inverters (GTI), is gaining importance owing to ever-increasing energy demand. Study of islanding behavior of such GTIs is critical for detecting island formation and for subsequently ceasing DER operation. The grid-interface structure of a GTI considered for islanding study typically consists of a parallel RLC network forming the load bank, along with grid and grid-impedance. Existing models for analysis of grid-interface are based on time-domain differential equations and are less insightful for analytical study of the ac phenomena occurring during and after island formation. In this paper, a dynamic-phasor based approach is investigated for modeling and analysis of grid-interface passive network system of a DER. A generic and simplified framework is proposed for developing polar coordinates based dynamic phasor models of passive networks, which are verified through simulation and experiments.
Modeling and analysis of passive networks using dynamic phasors for study of islanded inverters
2017-12-01
630192 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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