Title: Add Voltage Support Requirement for IRRs and Allow SCADA Control of Static VAr Devices if Approved by ERCOT (formerly "Add Voltage Support Requirement for IRRs and Allow Manual Control of Static VAr Devices if Approved by ERCOT")
Next Group:
Next Step:
Status: Approved on 02/21/2012
Effective Dates:


Date Gov Body Action Taken Next Steps
02/21/2012 BOARD Approved
01/05/2012 TAC Recommended for Approval Board consideration
12/15/2011 PRS Recommended for Approval TAC consideration
11/17/2011 PRS Recommended for Approval PRS review the Impact Analysis

Voting Record

Date Gov Body Motion Result
02/21/2012 BOARD To approve NPRR423 as recommended by TAC in the 1/5/12 TAC Report. Passed
01/05/2012 TAC To recommend approval of NPRR423 as recommended by PRS in the 12/15/11 PRS Report. Passed
12/15/2011 PRS To endorse and forward the 11/17/11 PRS Report and Impact Analysis for NPRR423 to TAC Passed
11/17/2011 PRS To recommend approval of NPRR423 as amended by the 11/14/11 Oncor Electric Delivery comments and as revised by PRS 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: Nov 2, 2011
Sponsor: ERCOT
Urgent: No
Sections: 3.15
Description: This Nodal Protocol Revision Request (NPRR) includes Intermittent Renewable Resources (IRRs) in the voltage requirement and clarifies the reactive requirement to be the same as Wind-powered Generation Resources (WGRs). This NPRR also proposes that switchable static Volt-Ampere reactive (VAr) devices can be Supervisory Control and Data Acquisition (SCADA) controlled if approved by ERCOT.
Reason: Similar to WGRs, solar power plants cannot have or have very limited reactive capability at output less than 10%. This NPRR will clarify the Reactive Power requirement for solar power plants. Paragraph (8) of Section 3.15 allows Generation Entities to submit ERCOT-specific proposals to meet the Reactive Power requirements. Depending on the location and size of those proposed static VAr devices, the Transmission Service Provider (TSP) may suggest that those devices are in the manual control mode to avoid undesired ERCOT System impacts, such as voltage swing during the switching of those VAr devices. This NPRR provides a solution for those proposed VAr devices operating in the manual control mode based on the agreement between the Generation Resource and TSP

Key Documents

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