Improved Wind Station Profits Through Excellent O&M


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Presentation by Bill Manganaro, NAES Project Manager - Renewable Energy World Conference 2011

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  • Good morning!For a few minutes we’ll discuss how excellent O&M optimizes wind generation station’s revenue and maintains asset values.
  • Apply experience from operating power stations:Same fundamentals applySimilar information is neededStatus of equipmentPlanningPerformance monitoringImmature state of industry = dependence on OEMBefore going further, OEM is NOT BAD but priorities differ from those of owner.
  • Few / ManyST or CT have numerous complex support systemsWTGs have fewer, less complex support systems.40 year life vs. 20 year lifeStraight-forward vs. PTC, tax credits, Feed-in tariffs.Years of experience to develop maint. Plan vs. complete dependence on OEM.Experienced users’ groups vs. new or no groupsAccessible in seconds vs. Miles and 80 m towerNot dispatchable/manned during the day vs. 24/7
  • Short model runs = less experience upon which to base maintenance decisions. Longevity questions? Both over and under maintain.Investment/financing methods changing: Congress has not created a LT and level playing field.Wind impact on the grid – excess in the NW means curtailmentsSingle provider means less fewer choices, less competition
  • Staff: PM, PA, 4 techs (2 pairs)Techs are the eyes and ears of the PMOne man cannot know condition of towers/nacelles and also perform PM duties of a typical power station.
  • ID problems early = time to negotiate with OEM during warranty.
  • Avoid surprises and costly repairs follow end of warranty period.Cost: $2000 to $3000
  • 6 months beforeMechanical: main bearingGear boxYaw systemTowerBrakeBladesBlade bearingsLifting equipGeneral cleanlinessAlignmentsCooling systemsLub and Hyd systemsEoWElectrical:Elect cabinetsHub slip ring systemGeneratorConverter system
  • Improved Wind Station Profits Through Excellent O&M

    1. 1. Improved Wind Stations Profits Through Excellence in O&M<br />William F. Manganaro<br />
    2. 2. How?<br />Operate and maintain a wind generation station – aka “Wind farm” as a power plant<br />Multi-100s dollar investment<br />Challenge: immature state of the industry<br />
    3. 3. Thermal vs. Wind Generation<br />Prime Movers – number and complexity<br />Technology improvements<br />Life<br />Investment strategies<br />Maintenance plans<br />Accessibility<br />Dispatch and manning<br />
    4. 4. Risks in Wind Generation<br />Rapid evolution / short model runs<br />Changing investment strategies<br />Changing grid conditions<br />Significant dependence on a single provider<br />
    5. 5. Apparent Attitude with Wind<br />Just maintain it<br />Less oversight<br />Cost, cost, cost<br />The “farm”<br />
    6. 6. Power Station Management<br />The fundamentals are unchanged:<br />Operate safely<br />Plan<br />Comply with the plan<br />Require performance<br />
    7. 7. Different Priorities<br />Owners’ Priorities:<br />Maximize availability<br />Maximize revenue<br />ID and resolve warranty issues<br />Build material history (understand WTG conditions)<br />Achieve short AND long-term performance<br />Good business relations<br />Competitively source parts and labor services<br />OEM Priorities:<br />Perform contracted work at minimum cost<br />Expend no more $ than necessary<br />Achieve availability required by contract<br />Win follow-on S&M contract<br />If not won, maximize future revenue by:<br />Retain material history<br />Retain SCADA data<br />Sole source of parts<br />
    8. 8. Methods - Tools<br />Excellent continuous operations:<br />Small plant staff<br />Annual O&M plan<br />Computerized Maintenance Management System<br />
    9. 9. Subjective Value Added<br />Plant staff knows its equipment<br />Early identification of material problems<br />Assist owner with negotiations to resolve issues<br />
    10. 10. End of Warranty Inspections<br />Why? <br />Options:<br />OEM’s report<br />Pre-EoW single inspection<br />On-going inspection and trending <br />Cost?<br />
    11. 11. EoW Inspections (con’t)<br />When to perform single inspection?<br />Components covered: (long list)<br />Continuous/periodic inspection & trending:<br />Annual or bi-annual<br />Graph results<br />CMMS use<br />“Mining” the SCADA<br />
    12. 12. Conclusion<br />Applying proven electrical generating station management principles optimizes income and preserves asset value.<br />Cost is a small staff.<br />Gains are from improved availability and smoother transitions: warranty to S&M, OEM S&M to post OEM<br />Creates options for the owner<br />
    13. 13. Questions?<br />