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Patch Railbelt coal generation after 2013.
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| generation <- generation %>% | ||
| # University of Alaska Fairbanks Coal Generation Facility | ||
| add_row( | ||
| year = 2011, | ||
| plant_name = "University of Alaska Fairbanks", | ||
| coal = 51303.62, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| add_row( | ||
| year = 2012, | ||
| plant_name = "University of Alaska Fairbanks", | ||
| coal = 46073.82, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| add_row( | ||
| year = 2013, | ||
| plant_name = "University of Alaska Fairbanks", | ||
| coal = 39249.20, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| # Doyon Utilities (Fort Wainwright CHP) | ||
| add_row( | ||
| year = 2011, | ||
| plant_name = "Utility Plants Section", | ||
| coal = 143877.91, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| add_row( | ||
| year = 2012, | ||
| plant_name = "Utility Plants Section", | ||
| coal = 149725.18, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| add_row( | ||
| year = 2013, | ||
| plant_name = "Utility Plants Section", | ||
| coal = 135054.67, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| # Eielson Air Force Base | ||
| add_row( | ||
| year = 2011, | ||
| plant_name = "Eielson AFB Central Heat & Power Plant", | ||
| coal = 74114, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| add_row( | ||
| year = 2012, | ||
| plant_name = "Eielson AFB Central Heat & Power Plant", | ||
| coal = 72445, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) %>% | ||
| add_row( | ||
| year = 2013, | ||
| plant_name = "Eielson AFB Central Heat & Power Plant", | ||
| coal = 71410, | ||
| aea_energy_region = "Railbelt", | ||
| source = "EIA923", | ||
| data_version = "Final" | ||
| ) | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,22 @@ | ||
| # Problem | ||
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| There is a significant jump in reported net generation statistics for the coal fuel code in the Railbelt after 2013. This year to year differential stays relatively flat after 2015; indicating some potential for anomaly across the sample - particularly regarding missing reporters in the previous years. | ||
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| # Investigation | ||
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| The net generation data by fuel code comes from the Alaska Energy Stats Workbooks. Years 2011 through 2013 were developed by AEA/ISER. In these workbooks, the only coal generation reported in the state comes from two coal generating facilities in Fairbanks: | ||
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| - Aurora Energy, Aurora Energy LLC Chena | ||
| - Healy, Golden Valley Electric Association, Inc. | ||
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| After querying coal generating statistics using EIA-923 from 2011-21, I found that the following generators are included in years after 2013 but not before: | ||
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| - Eielson Air Force Base (EIA ID: 50392) | ||
| - University of Alaska Fairbanks (EIA ID: 50711) | ||
| - Doyon Utilities - Fort Wainwright (EIA ID: 50308) | ||
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| This appears to have occurred because the 2011-13 workbooks developed by AEA/ISER only considered "certified utilities". Since the above coal generators are not certified utilities, they do not appear in the workbooks. This indicates a logic break in the data compiled after 2013 in terms of what qualifies. | ||
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| # Solution | ||
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| Given that these generators are present in 2014-21, it makes sense to add these generators retroactively to the dataset. This is completed with `patches/patch_002/01_railbelt_coal_generators.R`. As a result, the coal generation figures approximately double for years 2011-13. The data extracted from EIA-923 is also included in this patch in `patches/patch_002/railbelt_coal_generators_2011-13.csv`. This data was queried from EIA-923 (via PUDL) and then summed to the yearly level. These generators only report statistics for coal which is what I present here. |
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data/patches/patch_002/railbelt_coal_generation_2011-13.csv
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| "plant_name_eia","year","coal_net_gen" | ||
| "Aurora Energy LLC","2011",209150 | ||
| "Aurora Energy LLC","2012",201405 | ||
| "Aurora Energy LLC","2013",187843 | ||
| "Eielson Air Force Base Central","2011",74114 | ||
| "Eielson Air Force Base Central","2012",72445 | ||
| "Eielson Air Force Base Central","2013",71410 | ||
| "Healy","2011",177939.741210938 | ||
| "Healy","2012",215310.155273438 | ||
| "Healy","2013",191063.833984375 | ||
| "University of Alaska Fairbanks","2011",51303.6237792969 | ||
| "University of Alaska Fairbanks","2012",46073.8249511719 | ||
| "University of Alaska Fairbanks","2013",39249.2049560547 | ||
| "Utility Plants Section","2011",143877.90625 | ||
| "Utility Plants Section","2012",149725.177734375 | ||
| "Utility Plants Section","2013",135054.671875 |