Long term voltage stability thevenin index using voltage locus method

Author

Matavalam, Amarsagar Reddy Ramapuram ; Ajjarapu, Venkataramana

Author_Institution

Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA

fYear

2014

fDate

27-31 July 2014

Firstpage

1

Lastpage

5

Abstract

Monitoring long term voltage stability of the power grid is necessary to ensure the secure operation of the system. In this paper, the voltage locus of the load phasor as a function of the load increase is studied is studied from a geometric perspective. This locus is used to propose a Voltage Stability Index based on the magnitude of the measured voltage and calculated thevenin equivalent angles. A novel method to calculate only the necessary thevenin parameters is presented. The proposed Voltage Stability Index and the efficient thevenin calculation method are tested on the IEEE-30 Bus system with lagging, unity and leading power factors.

Keywords

power factor; power grids; power system stability; IEEE-30 bus system; Thevenin equivalent angles; Thevenin index; Thevenin parameters; geometric perspective; load phasor; long term voltage stability; power factors; power grid; voltage locus; voltage stability index; Indexes; Power system stability; Reactive power; Stability criteria; Transmission line measurements; Voltage measurement; Long Term Voltage Stability; Maximum Power Transfer; Thevenin Equivalent; Voltage Locus; Voltage Stability Index;

fLanguage

English

Publisher

ieee

Conference_Titel

PES General Meeting | Conference & Exposition, 2014 IEEE

Conference_Location

National Harbor, MD

Type

conf

DOI

10.1109/PESGM.2014.6938912

Filename

6938912