Title :
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
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;
Conference_Titel :
PES General Meeting | Conference & Exposition, 2014 IEEE
Conference_Location :
National Harbor, MD
DOI :
10.1109/PESGM.2014.6938912
