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https://www.nerc.com/pa/RAPA/gads/Training/Understanding_Appendix_F.pdf#:~:text=Equivalent%20Hours.%20Equivalent%20hours%20are%20derate%20events%20expressed,calculated%20by%20summing%20the%20durations%20of%20the%20derate
https://www.nerc.com/pa/RAPA/gads/Training/Understanding_Appendix_F.pdf
Equivalent Hours. Equivalent hours are derate events expressed as full outage hours. Equivalent hours are calculated by multiplying the derate duration by the MW reduction and dividing by NMC. For instance, the Equivalent Forced Derated Hours (EFDH) in April, 2016 are calculated by summing the durations of the derate
https://hoursfinder.com/e-hours/equivalent-forced-derated-hours.html
Equivalent reserve shutdown forced derated hours (ERSFDH) is the equivalent reserve shutdown hours during which a class 1, 2, or 3 unplanned derating was in effect. The word equivalent, again, implies: (U18.7) where Di and MC are as before and RSFDHi is the number of hours, while in reserve shutdown, that the unit is in the ith derated state.
http://www.nerc.com/pa/RAPA/gads/Wind%20Training/Wind%20GADS%20Training%20Module%2010%20-%20Derates.pdf
below. EFDTH = Equivalent Forced Derated Turbine Hours. How are Derates Used in Equations? •Given - FTH = 300 hrs., EFDTH = 30 hrs., CTH = 3,000 hrs., RUTH = 1,500 hrs., ERSDTH = 0Hrs •Therefore: •EEFOR = (300 + 30) / ((3,000-0) + 300 + 1,500) = 6.875% •You should be asking the question “Why is EFDTH not in the denominator?”
https://www.lawinsider.com/dictionary/derated-hours
Outage Rate Calculation basisDefinitionsEquivalent Forced Factor:OutageFOH (Forced Outage Hours) =Sum of all hours experienced during Forced Outages (U1, U2, U3) + Startup Failures (SF).(FOH + EFDH) x 100% PH EFDH (Equivalent Forced Each individual Forced Derated Hours) = Derating (D1, D2, D3) is transformed (D1, D2, D3) into equivalent full outage hour(s).
https://www.cw-connect.com/sites/default/files/2020-01/Reliability_Analysis_of_Power_Plant_Unit_Outage_Problems_2013.pdf
Equivalent Forced Outage Rate Calculation: EFOR = FOH + EFDH . (FOH + SH + Syn Hrs. + Pmp Hrs. + EFDHRS) where EFDH = (EFDHSH + EFDHRS) EFDHSH is Equivalent Forced Derated Hours during Service Hours. EFDHRS is Equivalent Forced …
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