A novel and fast voltage estimation scheme for assessment of power system component outages

Abstract

Purpose

The purpose of this paper is to pursue two following main goals: first, theorizing a new concept named as equivalent bus load in order to make a promising simplification over power system analysis. Second, proposing an outstanding fast and simple approach based on introduced concept for voltage estimation after multiple component outages while satisfying required accuracy.

Design/methodology/approach

Equivalent load bus theory introduces three transfer matrices that describe power system topology. Mentioned matrices could be calculated simply after system reconfiguration without matrix inversion. Using transfer matrices a large-scale power system can be modeled by a simple two-bus power system from the viewpoint of any desired bus so that load flow calculation leads to same value. The analysis of simplified power system yields to extract a new incremental model based on equivalent bus load theory that will be distinguished as an outstanding fast method for voltage estimation aim.

Findings

A deep study for fast voltage estimation aim is dedicated to evaluate proposed method from the accuracy and quickness point of view and the outcomes are compared to a well-known method as Distribution Factors (DF). Results and computational times unveil that presented approach is more accurate and much faster.

Originality/value

A novel and new fast voltage estimation method for assessment of power system component outages is introduced.

Citation

Masoud Fatemi, S., Abedi, M., Vahidi, B., Abedi, S. and Rastegar, H. (2014), "A novel and fast voltage estimation scheme for assessment of power system component outages", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 33 No. 4, pp. 1296-1328. https://doi.org/10.1108/COMPEL-06-2013-0206