On the use of df/dt in power system emergency control

Author

Bevrani, H. ; Ledwich, G. ; Ford, J.J.

Author_Institution

Sch. of Eng. Syst., Queensland Univ. of Technol., Brisbane, QLD

fYear

2009

fDate

15-18 March 2009

Firstpage

1

Lastpage

6

Abstract

This paper presents an overview of the key issues in the use of frequency rate change (df/dt) in power system emergency control schemes. The role of df/dt in designing effective under frequency load shedding (UFLS) plan is discussed. The impact of new variable renewable sources (such as wind and solar units) on system frequency gradient is analyzed, and the need for the revising of frequency performance standards, re-tuning of automatic UFLS relays, and use of Deltaf/Deltat rather than df/dt are emphasized.

Keywords

load shedding; power system control; frequency rate change; power system emergency control; renewable sources; system frequency gradient; under frequency load shedding; Control systems; Frequency; Power generation; Power system analysis computing; Power system control; Power system modeling; Power system protection; Power system relaying; Power systems; Protective relaying; Emergency control; Frequency rate change; Frequency response model; Renewable energy sources; Under-frequency load shedding;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Systems Conference and Exposition, 2009. PSCE '09. IEEE/PES

Conference_Location

Seattle, WA

Print_ISBN

978-1-4244-3810-5

Electronic_ISBN

978-1-4244-3811-2

Type

conf

DOI

10.1109/PSCE.2009.4840173

Filename

4840173