Assessment of the critical clearing time in low rotational inertia power systems

Conference paper (2018)

Authors

Francisco Gonzalez-Longatt Loughborough University

José L. Rueda Intelligent Electrical Power Grids -

D. Bogdanov Technical University of Sofia

Research Group

Intelligent Electrical Power Grids () (TU Delft)

Stability Protection Critical clearing time Angle stability Low inertia

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Published Date

2018

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

Intelligent Electrical Power Grids

Abstract

The growing share of power electronic/converter interfaced generation is decreasing the total system rotational inertia. The reduced rotational inertia in the power system has important impact on the electro-mechanical processes, the power angle and frequency evolution time are quicker resulting in faster transient processes. Rapid response of the protection systems shall be applied, in order to clear the faults in the power systems. This paper aims to identify the roots/mechanism of critical clearing time reduction/deterioration by determining/analyzing the trajectories of the critical clearing time (CCT) in low rotational inertia power systems. In this paper, the equal area criterion (EAC) is used for analysis purposes. Theoretical and practical findings demonstrate the increase of the rotational inertia increases the CCT.

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