An investigation of voltage instability problems

Author

Yorino, N. ; Sasaki, H. ; Masuda, Y. ; Tamura, Y. ; Kitagawa, M. ; Oshimo, A.

Author_Institution

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

Volume

7

Issue

2

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

600

Lastpage

611

Abstract

The authors investigate the voltage stability problem based on singular perturbation theory. Possible voltage instability patterns are classified into four types (I, II-1, II-2S, and II-2D) according to the mechanism causing voltage instability. Several features of each type of instability are studied as well as their analysis methods. Voltage instability tends to begin with type I and then leads to one of the remaining types. The load flow Jacobian can be an effective index to approximately assess type I and II-2S instabilities, while types II-1 and II-2D require direct nonlinear analyses and eigenvalue analyses, respectively. The validity of the classification proposed has been verified through numerical simulations and theoretical analyses which take into account dynamic characteristics of generating units, loads, and tap-changing transformers

Keywords

eigenvalues and eigenfunctions; electrical faults; harmonics; load flow; power systems; stability; direct nonlinear analyses; dynamic characteristics; eigenvalue analyses; electrical faults; generating units; harmonics; load flow Jacobian; loads; numerical simulations; power systems; singular perturbation theory; tap-changing transformers; voltage instability; Bifurcation; Character generation; Jacobian matrices; Load flow; Load flow analysis; Nonlinear dynamical systems; Power system dynamics; Power system stability; Transformers; Voltage;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.141765

Filename

141765