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Data Mining for Oscillations

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Need

One of the challenges brought about by the large wind portfolio in ERCOT is the presence of high/low frequency oscillations from wind generators driven by control systems with a bad setting in real-time. To address this, a study was undertaken to mine archived synchrophasor data from installed PMUs located near wind generators for oscillations and identify location, frequency of oscillation and minimum energy level. This project was carried out for Electric Reliability Council of Texas (ERCOT) as a part of the CCET Discovery Across Texas Project Funded by DOE.

Results

The study identified 10 previously unknown and unmonitored oscillatory modes that appear to be associated with wind production and control system design and settings.

Benefits

The results of this study informed the configuration of real-time tools for monitoring of and alerting for these oscillations. The study also provided an opportunity to review specific oscillations with wind plant owners to validate models and determine plausible termination of these modes.

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About EPG

Electric Power Group, LLC (EPG) has been pioneering the development and deployment of synchro-phasor technologies since 2000. Our principals have extensive experience in running and managing utility grids, investigating root causes of major blackouts (WECC 1996, EI 2003), and leveraging this deep domain knowledge to develop industry leading synchrophasor technology applications for wide area real time monitoring, visualization and situational awareness.

The EPG team has extensive hands-on experience with synchrophasor standards, networks, system architecture, deployments and performance analysis through work at EPG for leading ISO's and utilities including PJM, NYISO, ERCOT, CAISO, MISO, BPA, TVA, SCE, AEP, LADWP, SRP, Duke, Dominion, NYPA and other companies.


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