Item 15: Power Plant Winterization — original pdf
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Item 15 AE Power Plant Winterization EUC June 21, 2021 Pat Sweeney, VP, Power Production Sand Hill Plant 2/15/2021 © 2018 Austin Energy Plant Winterization Plans • Begins in Fall and is affirmed to ERCOT by December 21st each year • Consists of Permanent and Temporary Measures • Permanent Examples • Insulation in/on piping, cabinets • Metal structures around areas determined as concerns from past weather events • Heat Trace – electrical heating systems on critical components • Temporary Examples • Wind breaks, thermal blankets applied to critical components • Temporary Heat sources – portable propane or electrical heaters, lighting • Temporary Measures are installed while Permanent Measures are checked for proper function as per the plant weather preparation check list 2 Plant Winterization Plans • Measures are re-checked prior to a major forecast event like February • Operators use remote monitoring and visual checks to confirm status • Confirm function of emergency communications such as satellite phones • Personnel Measures • Ensure adequate staffing levels – increased during major forecast events • Provisioning for food and on-site lodging 3 Winter Prep installed around the lower areas of Unit # 5 Freeze Protection HRSG Wind Wall East side Sand Hill Plant 2021 4 Freeze Protection at the HRSG Doghouse Sand Hill Plant 2021 5 Freeze Protection HRSG Drums Sand Hill Plant 2021 Freeze Protection Unit #5 Evaporator Backflow 6 Freeze Protection Critical Tracing on the Plant Data recorders Sand Hill Plant 2021 7 Traveling Water Screen Trash Pumps Aux Cooling Water Anti-scaling chemical storage Decker Power Plant 2021 Circulating water pump gland water tubing 8 GT Water injection building Decker Power Plant 2021 Diesel Generator Building 9 North drum level condenser pot Decker Power Plant 2021 GT gas skid pressure control valves 10 Superheat and Reheat spray valve transmitters Lights installed inside boxes to generate heat Decker Power Plant 2021 11 Superheat spray valve North drum level transmitter Decker Power Plant 2021 Reheat spray valve 12 Instrument air pressure transmitter Decker Power Plant 2021 Instrument air intake 13 Sand Hill Plant 2/15/2021 14 Sand Hill Plant 2/15/2021 15 Looking Ahead • Reviews are still underway but we have identified some opportunities for improvement such as: • 2011 improvements mostly worked but didn’t in one instance – a protective controls cabinet proved inadequate – we’ve now added a heat source • Increased stocks for longer duration events: • Food for staff (ex. MREs) • Cots/bedding for staff • Fuel for portable heaters • Event/scenario training vs. check-list only • Regular reviews and updates to address changing needs in the future 16 QUESTIONS ? Confidential & Proprietary ©2018 Austin Energy. All rights reserved. Austin Energy and the Austin Energy logo and combinations thereof are trademarks of Austin Energy, the electric department of the City of Austin, Texas. Other names are for informational purposes only and may be trademarks of their respective owners.