A Framework for Dynamic Stability Analysis of Power Systems With Volatile Wind Power

A Framework for Dynamic Stability Analysis of Power Systems With Volatile Wind Power

Abstract:

We propose a framework employing stochastic differential equations to facilitate the long-term stability analysis of power grids with intermittent wind power generations. This framework takes into account the discrete dynamics, which play a critical role in the long-term stability analysis, incorporates the model of wind speed with different probability distributions, and also develops an approximation methodology [by a deterministic hybrid model (DHM)] for the stochastic hybrid model (SHM) to reduce the computational burden brought about by the uncertainty of wind power. The theoretical and numerical studies show that a DHM can provide an accurate trajectory approximation and stability assessments for the SHM under mild conditions. In addition, we discuss the critical cases that the DHM fails and discover that these cases are caused by a violation of the proposed sufficient conditions. Such discussion complements the proposed framework and methodology and also reaffirms the importance of the SHM when the system operates close to its stability limit.
A Framework for Dynamic Stability Analysis of Power Systems With Volatile Wind Power
Page(s): 422 – 431
Date of Publication: 13 February 2017
 ISSN Information:

INSPEC Accession Number: 17169602

Publisher: IEEE

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