Modal Analysis Method to Determine Voltage Stability in Electric Power Systems

Purwoharjono Purwoharjono; Rudy Gianto; Zainal Abidin

Authors

Purwoharjono Purwoharjono Department of Electrical Engineering, Faculty of Engineering, Universitas Tanjungpura Pontianak, Indonesia
Rudy Gianto Department of Electrical Engineering, Faculty of Engineering, Universitas Tanjungpura Pontianak, Indonesia
Zainal Abidin Department of Electrical Engineering, Faculty of Engineering, Universitas Tanjungpura Pontianak, Indonesia

Keywords:

Modal Analysis, Voltage Stability, Eigenvalue, Bus Participation Factor

Abstract

The modal analysis method is used to determine the stability of bus voltage in the electric power system based on the eigenvalue and participation factor of the bus. The Java-Bali 500 kV electrical system will be used as a sample for the research. This research begins with a power flow simulation to identify buses whose voltages are outside the specified tolerance value. Afterward, an assessment of the eigenvalue on each load bus is conducted, which can be used to determine the stability of each bus based on the weakest system mode. Then, the bus participation factors are assessed, to identify which buses have the lowest values. The result shows that all eigenvalues are positive, confirming the stability of the Java-Bali 500 kV electricity system.