Automatic Load Shedding Schemes against Voltage Instability in the Hellenic System

Author

Nikolaidis, V.C. ; Vournas, C.D. ; Fotopoulos, G.A. ; Christoforidis, G.P. ; Kalfaoglou, E. ; Koronides, A.

Author_Institution

Sch. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens (NTUA), Athens

fYear

2007

fDate

24-28 June 2007

Firstpage

1

Lastpage

7

Abstract

Based upon the experience gained from the 2004 blackout and the on-line voltage security assessment operation that is in service since 2005, the Hellenic transmission system operator (HTSO) decided to automate the process of load shedding in the Hellenic Interconnected System, in order to reduce the risk of voltage collapse in the event of critical contingencies. Analytical description of the design and implementation of two individual load shedding schemes in the Hellenic System is presented in this paper. Analysis and simulation results that investigate and validate the efficiency of these protection schemes are included in the paper.

Keywords

load shedding; power system interconnection; power system security; power system stability; power transmission protection; Hellenic interconnected system; Hellenic transmission system operator; automatic load shedding schemes; on-line voltage security assessment operation; protection schemes; voltage instability; Control systems; Data security; Information security; Interconnected systems; Power generation; Power system security; Protection; Stability; Urban areas; Voltage; Emergency Control; Load Shedding; System Protection Schemes; Voltage Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society General Meeting, 2007. IEEE

Conference_Location

Tampa, FL

ISSN

1932-5517

Print_ISBN

1-4244-1296-X

Electronic_ISBN

1932-5517

Type

conf

DOI

10.1109/PES.2007.386083

Filename

4275849