Voltage instability in a power system with single OLTC

Author

Yorino, N. ; Galiana, F.D.

Author_Institution

Dept. of Electr. Eng.. Hiroshima Univ., Japan

Volume

5

fYear

1992

fDate

10-13 May 1992

Firstpage

2533

Abstract

Investigates power system voltage stability in the presence of on-load tap-changing (OLTC) transformers. To assess this type of voltage instability, the sensitivity, dV/dn, of a load voltage, V, to a tap position, n, is analyzed to show the following theoretical results: (1) The region of normal control where inverse control action does not occur lies inside the stability region when there exists an equilibrium. This region is presented as O<I<I_max. (2) Even if an equilibrium does not exist, the voltage continues to recover in the region where this condition holds. (3) The operating point I=∞ corresponds to the point of the static bifurcation which is caused by the dynamics of the load at the bus controlled by the OLTC

Keywords

bifurcation; power system stability; power transformers; OLTC; load voltage; on-load tap-changing; power system; power system voltage stability; stability region; static bifurcation; tap position; transformers; voltage instability; Bifurcation; Equations; Induction motors; Load flow; Power system dynamics; Power system modeling; Power system stability; Power systems; Transformers; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1992. ISCAS '92. Proceedings., 1992 IEEE International Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-0593-0

Type

conf

DOI

10.1109/ISCAS.1992.230470

Filename

230470