An Enhanced WAMS‐based Power System Oscillation Analysis Approach

This chapter introduces an enhanced data processing method based on the Hilbert‐Huang transform (HHT) technology for studying power system oscillation dynamics. It reviews the standard HHT method and its limitations. The chapter also demonstrates the application of the enhanced HHT method to a wide variety of problems in power system monitoring. The chapter also introduces the Hilbert marginal spectrum (HMS) analysis technique that is adopted to determine the center frequency from the original phasor measurements of power system output variables. In the chapter, the Japan power network is used as a case study. To establish a real wide area measurement system (WAMS), 13 PMUs are installed in universities/institutes in different geographical locations of Japan. Furthermore, the chapter presents a monitoring and estimation scheme for power system inter‐area oscillation based on wide area phasor measurements from the Campus WAMS.