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Impact of Wind Generation on Inertial Frequency Response

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Need

One of the challenges brought about by the large wind penetration is to maintain an adequate level of Inertial Frequency Response that is crucial to ensure reliable operation of grid. This study was proposed to investigate the contribution of wind generation on Inertial Frequency Response based on a starting hypothesis that a decline in Inertial Frequency Response with respect to increasing wind generation was being observed in ERCOT Interconnection. The performance of inertial frequency response was investigated at different levels of wind generation as part of this analysis. 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 outcome of the study provided evidence under four different scenarios to conclude that Wind Generation does not contribute to Inertial Frequency Response. The Inertial frequency response is driven by the amount of Non-Wind Generation available online. The Non-Wind Generation is a mix sum of Total ERCOT Generation plus Spinning Reserves.

Benefits

The results of this study informed ERCOT operations to commit minimum Non-Wind Generation online to maintain adequate levels of Inertial Frequency Response under all conditions to meet NERC compliance.

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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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