Title: Ramp Rate Limitation of 10% per minute of On-Line Installed Capability for Wind-powered Generation Resources
Next Group:
Next Step:
Status: Approved on 07/20/2010
Effective Dates:

or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (08/01/10 Nodal Protocols Library)


Date Gov Body Action Taken Next Steps
07/01/2010 TAC Recommended for Approval ERCOT Board consideration of NPRR239
05/20/2010 PRS Recommended for Approval PRS Impact Analysis review
07/20/2010 BOARD Approved
06/17/2010 PRS Recommended for Approval TAC consideration of NPRR239

Voting Record

Date Gov Body Motion Result
07/01/2010 TAC To recommend approval of NPRR239 as recommended by PRS in the 6/17/10 PRS Report. Passed
05/20/2010 PRS To recommend approval of NPRR239 as submitted. Passed
07/20/2010 BOARD To approve NPRR239 as recommended by TAC in the 7/1/10 TAC Report. Passed
06/17/2010 PRS To endorse and forward the 5/20/10 PRS Report and Impact Analysis for NPRR239 to TAC. Passed

Vote tallies here reflect individual votes, not the weight of the votes by market segment. Affirmative votes are not recorded in these vote tallies. For additional details on the voting record, please consult the Recommendation or Action Report, or the official vote tally if available, as posted in the key documents.


Status: Approved
Date Posted: May 12, 2010
Sponsor: ERCOT
Urgent: No
Description: This Nodal Protocol Revision Request (NPRR) proposes a requirement that certain Wind-powered Generation Resources (WGRs) limit the unit ramp rate to 10% per minute of their nameplate rating as registered with ERCOT. The proposed language is based on the concept set forth in zonal Protocol Section 6.5.13, WGR Ramp Rate Limitations.
Reason: The intent of this NPRR is to maintain system reliability as it allows ERCOT to avoid frequency spikes due to WGRs’ ability to ramp up or ramp down almost instantaneously.

Key Documents

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