System vulnerability as a concept to assess power system dynamic security

Author

Fouad, A.A. ; Zhou, Qin ; Vittal, V.

Author_Institution

Iowa State Univ., Ames, IA, USA

Volume

9

Issue

2

fYear

1994

fDate

5/1/1994 12:00:00 AM

Firstpage

1009

Lastpage

1015

Abstract

The concept of system vulnerability is introduced as a new framework for power system dynamic security assessment. This new concept combines information on the level of security and its trend with changing system condition. In this paper the transient energy function (TEF) method is used as a tool of analysis. The energy margin ΔV is used as an indicator of the level of security, and its sensitivity (∂ΔV/∂p) to a changing system parameter p as an indicator of its trend. The thresholds for acceptable levels of the security indicator (ΔV) and its trend (∂ΔV/∂p) are related to the stability limits of a critical system parameter. A method is proposed to determine these thresholds using heuristic techniques derived from operating practices and policies for a change in plant generation. Results from the IEEE 50 generator test system are presented to illustrate the procedure

Keywords

power system control; power system protection; power system stability; power system transients; IEEE 50 generator test system; energy margin; heuristic techniques; plant generation; power system dynamic security; sensitivity; stability limits; system vulnerability; transient energy function; transient stability; Data security; Information security; Power supplies; Power system dynamics; Power system measurements; Power system security; Power system stability; Power system transients; Senior members; Student members;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.317643

Filename

317643