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NPRR239

Summary

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
12/01/2010

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

Action

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

Background

Status: Approved
Date Posted: May 12, 2010
Sponsor: ERCOT
Urgent: No
Sections: 6.5.7.10
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.

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