Method and system for controlling stability of electric...

Details Method and system for controlling stability of electric... Method and system for controlling stability of electric...

2011-06-21

2011-06-21

Decady, Albert (Department: 2121)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Electrical power generation or distribution system

C700S297000, C700S298000, C702S057000, C702S060000

Reexamination Certificate

active

07966101

ABSTRACT:
The phase and time information of a voltage at a power supply outlet is detected at points, and sent to a data server. With one end of a system used as a phase angle reference, the data server observes phase differences at another end, and at a center. The data server then extracts an inter-system fluctuation component from an obtained fluctuation, and constructs an expanded combined vibration model for data sets obtained through first- and second-order differentiations of the component. The expanded combined vibration model is obtained by expanding a combined vibration model to include a known model of a PSS provided for a generator of interest. Time-series data regarding state variables of the PSS at the time of construction of the expanded combined vibration model are obtained, and PSS parameters are determined directly therefrom by the expanded combined vibration model, thereby achieving stabilization of dominant modes.

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