Systems and methods for real-time detection and mitigation of power system oscillatory instability

A method for controlling a power system, the method performed by self-tuning computer system including at least one processor in communication with a power system stabilizer and at least one memory device, the method comprising:

• receiving a plurality of sensor information of operation of a generator;
• detecting an oscillation during operation of the generator from the plurality of sensor information;
• calculating a current damping ratio based on the plurality of sensor information including one or more vibration amplitudes;
• comparing the current damping ratio to a user defined threshold range to make a determination whether the current damping ration is within a user defined range;
• in response to the determination that the current damping ratio is not within the user defined threshold range, converting the oscillation into the time domain;
• in response to the determination that the current damping ratio is not within the user defined threshold range, determining a gain and a time constant to counteract the oscillation based upon the time domain oscillation;
• and
• in response to the determination that the current damping ratio is not within the user defined threshold range, transmitting, to the power system stabilizer, the gain and the time constant, wherein the power system stabilizer is configured to instruct an automatic voltage regulator to adjust its pulse output voltage based on the gain and the time constant.

A computer device for controlling a power system comprising at least one processor in communication with at least one memory device and a power system stabilizer, wherein the at least one processor is programmed to:

• receive a plurality of sensor information of operation of a generator;
• detect an oscillation during operation of the generator from the plurality of sensor information;
• calculate a current damping ratio based on the plurality of sensor information including one or more vibration amplitudes;
• compare the current damping ratio to a user defined threshold range to make a determination whether the current damping ration is within a user defined range;
• in response to the determination that the current damping ratio is not within the user defined threshold range, convert the oscillation into the time domain;
• in response to the determination that the current damping ratio is not within the user defined threshold range, determine a gain and a time constant to counteract the oscillation based upon the time domain oscillation;
• and
• in response to the determination that the current damping ratio is not within the user defined threshold range, transmit, to the power system stabilizer, the gain and the time constant, wherein the power system stabilizer is configured to instruct an automatic voltage regulator to adjust its pulse output voltage based on the gain and the time constant.