STUDY ON STABILITY FOR LONGITUDINAL POWER SYSTEM BY USING EMPIRICAL MODE DECOMPOSITION METHOD

Doan Van Dien; Nguyen Thi Thuy Dung

Doan Van Dien Hung Yen University of Technology and Education
Nguyen Thi Thuy Dung Hung Yen University of Technology and Education

Keywords: Power system stability, low frequency oscillation, empirical mode decomposition, timefrequency analysiss

Abstract

When the electrical power system appears agitated, it will lead to changes in dynamic characteristics such as power oscillation, voltage oscillation, frequency oscillation, especially low-frequency power oscillation on interconnections lines. These oscillations have the potential to destabilize the electrical power system. Accurate determination of low frequency oscillations for real systems is quite difcult. This paper introduces the initial research results on the determination of low-frequency power oscillation of the inter-regional power system based on the analysis method in the frequency domain and simulation in the time domain. Use the Hilbert Huang transform to examine the nature of the oscillations. The study also proposes the use of power system stabilizers to enhance the damping of oscillation and improve the stability of the electrical power system.

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