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EIA Monthly Energy Comparisons

EIA Monthly Energy Comparisons. Compared EIA-reported monthly energy values with those obtained from operators USBR (East and CA), COE (NW), PAC (NW and CA), CA non-ISO (SMUD, LADWP, CCSF, TIDC) Looked at 2001, 2005, and 2010 data where available

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EIA Monthly Energy Comparisons

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  1. EIA Monthly Energy Comparisons

  2. Compared EIA-reported monthly energy values with those obtained from operators • USBR (East and CA), COE (NW), PAC (NW and CA), CA non-ISO (SMUD, LADWP, CCSF, TIDC) • Looked at 2001, 2005, and 2010 data where available • Compared monthly energies for both data sources • Calculated differences (Actual-EIA) to see trends • Calculated the average monthly energy differences for each month • Calculated the total average monthly energy difference for each plant

  3. NW COE/EIA (2001, 2005, 2010) Fairly consistent for all data years Random differences for all data years *March 2001 was off for all plants Due to 2005 data Consistently different for all data years – this was typical for plants with pumped storage

  4. CA Non-ISO/EIA (2001) TIDC Again, large differences for pumped storage

  5. PAC/EIA (2001, 2005) Average differences mainly due to 2005 data

  6. EAST USBR/EIA (2001, 2005, 2010) Due to 2010 data Due to 2001 data Consistently different Pumped storage

  7. CA USBR/EIA (2001, 2005, 2010)

  8. Observations/Conclusions • EIA/Operator monthly energy differences fairly random • Sometimes it seems a particular year is off (PAC 2005), sometimes just a month (NW COE March 2001) • Plants with pumped storage generation capacities have consistent EIA/Operator differences • How is data reported to EIA? • Importance?

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