Chapter 4An Enhanced WAMS-based Power System Oscillation Analysis Approach

Qing Liu1, Hassan Bevrani2 and Yasunori Mitani3

1Researcher, Department of Electrical and Electronics Engineering, Kyushu Institute of Technology, Kitakyushu, Japan

2Professor, Smart/Micro Grids Research Center, University of Kurdistan, Sanandaj, Iran

3Professor, Department of Electrical and Electronics Engineering, Kyushu Institute of Technology, Kitakyushu, Japan

Modern interconnected wide area power systems around the world are faced with serious challenging issues in global monitoring, stability, and control mainly due to increasing size, changing structure, emerging new uncertainties, environmental issues, and rapid growth in distributed generation. The present chapter introduces an enhanced data processing method based on the Hilbert-Huang Transform (HHT) technology for studying power system oscillation dynamics.

The method discussed could be useful in developing a new oscillation monitoring system using real-time wide area measurement system performed by phasor measurement units (PMUs). The present methodology analyzes power system oscillation characteristics and estimates the damping of oscillatory modes from ambient data. The proposed method gives an indication for damping of transient oscillations following disturbances. It employs a system identification procedure that is carried out in a real-time environment. To demonstrate the effectiveness of the developed methodology, PMU-based measured ...

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