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Modeling 400 kV transmission grid with system protection and disturbance analysis

Power swing and out of step conditions are two power system phenomena which are elaborated in this paper from the power system protection point of view. For that purpose a Matlab model of a part of a 400 kV transmission grid with system protection was modelled. Transmission system disturbance analysis represents a background for different types of research scenarios. Powerful tools for transmission disturbances analysis are phasor measurement data sets and transmission grid models. Recorded disturbance data is used to check and validate the transmission grid model. In this paper different types of disturbance scenarios were analyzed. The protection system response of a 400 kV transmission line is analyzed for mild and heavy power swinging scenario. The purpose of the presented research is to explore the possibility to create a central protection system for a transmission grid that is resilient to disturbances.