A strategy for undervoltage load shedding in power systems

Author

Balanathan, Ragu ; Pahalawaththa, Nalin C. ; Annakkage, Udaya D.

Author_Institution

Dept. of Electr. & Electron. Eng., Auckland Univ., New Zealand

Volume

2

fYear

1998

fDate

18-21 Aug 1998

Firstpage

1494

Abstract

This paper presents a strategy for undervoltage load shedding in power systems. An undervoltage load shedding (UVLS) criterion is defined using a generic dynamic load model to determine the amount of load to shed at a given voltage. The `when and where´ for load shedding is determined by identifying the weakest node in the network using a voltage collapse proximity indicator (VCPI). The magnitude of the VCPI is determined by estimating the ratio of the impedance of the load to the Thevenin impedance looking into the network at a given voltage. If required, further load shedding can be carried out by observing the VCPI. The strategy is simple, reliable and can be applied to any power system

Keywords

electric impedance; load (electric); load shedding; power system dynamic stability; Thevenin impedance; generic dynamic load model; power systems; sensitivity; undervoltage load shedding; voltage collapse proximity indicator; weakest node identification; IEEE members; Impedance; Load modeling; Power system dynamics; Power system modeling; Power system reliability; Power system stability; Power systems; Reactive power; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology, 1998. Proceedings. POWERCON '98. 1998 International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-4754-4

Type

conf

DOI

10.1109/ICPST.1998.729336

Filename

729336