Non-Spin Deployment Resmi Surendran. RUC Awarded Ancillary Service Bring Resources On-Line if awarding REG or RRS When awarding Non-Spin – First award.

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Presentation transcript:

Non-Spin Deployment Resmi Surendran

RUC Awarded Ancillary Service Bring Resources On-Line if awarding REG or RRS When awarding Non-Spin – First award to Non-Spin qualified Resources which have a lead time less than 30 mins and let them stay offline The QSE will get RUC makewhole payment if they come online due to NSRS deployment The QSE can file a dispute to recover any losses due to fuel purchased at a higher price and sold at a loss if they didn’t get a Non-Spin deployment – If there are not enough resources with lead time less than 30 mins and then award to other Non-Spin qualified Resources for hours that can satisfy its lead time and then ask them to come On-Line with Non-Spin Schedule & Responsibility = HSL-LSL The QSE will get RUC makewhole payment due to them being online.

Possible Deployment Criteria When (HDL – Gen) ≤ 200 MW and (HASL – Gen) – (30- minute load ramp) deploy all When (HDL – Gen) ≤ 200 MW and (HASL – Gen) – (30- minute load ramp) deploy half When PRC ≤ 2500 MW - deploy enough to recover PRC When PRC ≤ 2300 MW -> deploy all To recall deployed RRS when enough capacity is not available to SCED If the North-to-Houston (N_H) Voltage Stability Limit deploy in the Houston area to restore reliability margin

Partial Deployments ERCOT is looking into possibility of more granular deployments – to deploy based on the immediate need – to give time for market to respond to scarcity – to reduce the amount of LSL energy pumped into the system during Non-Spin deployments

Issues with Partial Deployments Can not enable sending deployment instruction at the beginning of the hour – Deployment is currently based on telemetry – Resources could change responsibility every hour – 30 min ramping period at the beginning of an hour could cause spinning capacity not available when Resource go offline and come online due to change in Non-Spin Responsibility

Short Term Solution Don’t enable sending deployment instruction at the beginning of the hour and deploy full Send out a message to all MPs on the Notice Builder when ERCOT deploys Non-Spin. – Ensure that QSEs are aware of Non-Spin deployment – QSEs can better manage their portfolio and work on getting the offline Resources online in time if needed to ensure continuity of services provided For Resources that didn’t have Non-Spin Responsibility at the time of deployment and have new responsibility for some of the future hours in the deployment window

Long Term Solution Options Make hourly autosend based on COP Non-Spin Responsibility and send it out 30 minutes before the beginning of the hour. i.e. QSEs won’t be able to change Non-Spin Responsibility in RT if Non-Spin is deployed Deploy based on telemetered Non-Spin Responsibility and change protocol to require QSEs to keep the OFFNS Resources On-Line at least one more hour after the responsibility ends when Non-Spin is deployed Change protocol to require QSEs to make Non-Spin capacity available from a Resource to SCED, irrespective of the Resource’s Non-Spin Responsibility, from the time the Resource get Non-Spin deployment until all of the Non-Spin deployment is recalled from the system (Similar to RRS performance requirement from UFR)

Questions?