An Approximation of Higher-Order Interconnected Power System Model Using Direct Truncation Approach

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Abstract

The higher-order single-area interconnected power system model is reduced to a comparatively lower order in this article. The model of interconnected power system with hydro, thermal and gas electric power plant is constructing the overall 11th order higher-order system(HOS) by integrating all the system dynamics. This HOS is reduced to 2nd ,3rd,4th , and 5th –order models in this article. These models are proposed by employing truncation-based order reduction method. To demonstrate the suitability of the proposed reduced order models (ROMs), a comparative analysis between HOS and ROM is also done. The stability analysis is presented by tabular representation of time specifications and indices of error. The stability analysis is also shown for the same by Bode plot. MATLAB/Simulink is used of obtain responses.

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Keywords

Approximation, Direct truncation, Reduced-order modelling, Stability