Consideration of controllability and observability of generators in the coherency-based dynamic equivalencing

Author

Kasztel, Z. ; Erlich, I.

Author_Institution

Dept. of Electr. Power Syst., Duisburg Univ., Germany

Volume

2

fYear

2001

fDate

2001

Abstract

This paper describes an improved method for developing dynamic equivalents. The method bases on the coherency of generators quantified by the correlation coefficient of the swing curves. For measuring the electromechanical distance of generators from the interesting areas, controllability and observability indices are defined. These are calculated on the base of the linearized system equations. A modified correlation formula is used for considering the controllability and observability. As a result, distance generators will be put together into a coherent group rather then those with large controllability and observability factors

Keywords

controllability; machine control; observability; power system control; power system interconnection; power system stability; synchronous generators; coherency-based dynamic equivalencing; controllability indices; distance generators; dynamic equivalents; electromechanical distance; large interconnected power systems; linearized system equations; model aggregation; modified correlation formula; observability indices; power system stability; swing curves correlation coefficient; synchronous generators; Controllability; Equations; Load flow; Observability; Power generation; Power system dynamics; Power system interconnection; Power system modeling; Power system simulation; Power system stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Tech Proceedings, 2001 IEEE Porto

Conference_Location

Porto

Print_ISBN

0-7803-7139-9

Type

conf

DOI

10.1109/PTC.2001.964719

Filename

964719