Latest revision as of 11:06, 26 May 2021

Where

Main Menu / Power / Generation / Historical Data / CEMS

What

The EPA (Environmental Protection Agency) provides Continuous Emissions Monitors (CEMS) data publicly. Ansergy captures this data and presents it in an easy to read format.

CEMS is EPA’s power plant database of hourly data and includes the following unit-level data:

History – full hourly starting on January 1, 2009 through March 31, 2019. EPA updates CEMS once a quarter, about 30 days following the expiry of the Q.
Energy – hourly MWH by generating unit; our WECC CEMS has 680 coal and gas-fired units reflecting around 60,000 MWs of capacity.
Fuel Burn – both hourly coal and gas burn measured in MMBtu.
Emissions – SOX, NOX, and CO2
Rates – SOX/MWh, NOX/MWh, CO2/MWh
Heat Rates

Table Depiction

Report Types

Heat Rates

CEMS is the only source for actual heat rates. Ansergy has made it easy to pull these with its canned heat rate report. With a click, you can see summer, winter, or melded heat rates computed from actual gas burn and generation since 2009. You can also derive other heat rates like Ramp Up heat rates.

Outages

Another energy mystery are outages; only the NERC and the plant owners have the true outages … and users of CEMS. Ansergy has compiled lists of all unit outages greater than 2 Days.

In the above example, we filtered out the coal units and get a list of every outage greater than 2 days since 2009. Look for repetitive outages of similar duration to back into planned outages, or compute your own forced outage rates.

CEMS Emissions

Each unit returns its hourly SOX, NOX, and CO2. You can then compile emission rates either by fuel (MMBTU) or energy (MWH). In the above example, California SOX, NOX, and CO2 are plotted and aggregated by month for the HL hours. Use the standard charting filters to make changes.

Related Reports

EIA 861M (Behind the Meter)
EIA 861M Detail
Capacity Change
CEMS

==

@@ Line 3: / Line 3: @@
-[[File:Capacity Change Menu.jpg|alt=Menu Location|400x400px]]
+[[File:CEMS Menu.jpg|alt=Menu Location|400x400px]]
 = What =
-This report displays the changes in the most recent EIA 860 Monthly capacity update.
+The EPA (Environmental Protection Agency) provides Continuous Emissions Monitors (CEMS) data publicly.  Ansergy captures this data and presents it in an easy to read format.
-* Current – most recent month (typically delayed about 60 days)
-* Prior – the month preceding Current
-Only records that have changed from the prior month are included. Changes could be Online Date, Capacity (MW), Status, or Owner. New additions will have no Prior; a Prior with no Current means a dropped plant.
+CEMS is EPA’s power plant database of hourly data and includes the following unit-level data:
-[[File:Capacity Change Table Depiction.jpg|alt=Table Depiction|none|thumb|800x800px|Table Depiction]]
-== Capacity Change Fields ==
+* History – full hourly starting on January 1, 2009 through March 31, 2019. EPA updates CEMS once a quarter, about 30 days following the expiry of the Q.
+* Energy – hourly MWH by generating unit; our WECC CEMS has 680 coal and gas-fired units reflecting around 60,000 MWs of capacity.
+* Fuel Burn – both hourly coal and gas burn measured in MMBtu.
+* Emissions – SOX, NOX, and CO2
+* Rates – SOX/MWh, NOX/MWh, CO2/MWh
+* Heat Rates
-*'''Hub:'''  The hub associated with the corresponding Plant Name
+[[File:CEMS Table.jpg|alt=Table Depiction|none|thumb|800x800px|Table Depiction]]
-*'''Plant Name:'''  The plant name as assigned by the EIA
-*'''MW:'''  Generating capacity of the plant
+== Report Types ==
-*'''Type:'''  The type of change being noted (Current – most recent month (typically delayed about 60 days; Prior – the month preceding Current)
-*'''Online:'''  The date that the plant came online
+=== Heat Rates ===
-*'''State:'''  State in which the plant is located
+[[File:CEMS Heat Rate.jpg|500x500px]]
-*'''County:'''  County in which the plant is located
-*'''GenID:'''  The GenID assigned by the EIA
+CEMS is the only source for actual heat rates. Ansergy has made it easy to pull these with its canned heat rate report.  With a click, you can see summer, winter, or melded heat rates computed from actual gas burn and generation since 2009.  You can also derive other heat rates like Ramp Up heat rates.
-*'''BA:'''  The balancing authority associated with the corresponding Plant Name
-*'''Owner:'''  The listed owner of the plant as shown by the EIA
+=== Outages ===
-*'''Technology:'''  The type of fuel/source of power used by the plant
+[[File:CEMS Outages.jpg|alt=CEMS Outages|500x500px]]
-*'''Fuel:'''  Abbreviated fuel type
-*'''PM:'''  Prime Mover abbreviation
-*'''Status:'''  The current status of the plant (Operational, Cancelled etc)
+Another energy mystery are outages; only the NERC and the plant owners have the true outages … and users of CEMS. Ansergy has compiled lists of all unit outages greater than 2 Days.
+In the above example, we filtered out the coal units and get a list of every outage greater than 2 days since 2009. Look for repetitive outages of similar duration to back into planned outages, or compute your own forced outage rates.
+=== CEMS Emissions ===
+[[File:CEMS Emissions.jpg|alt=CEMS Emissions|500x500px]]
+Each unit returns its hourly SOX, NOX, and CO2. You can then compile emission rates either by fuel (MMBTU) or energy (MWH).  In the above example, California SOX, NOX, and CO2 are plotted and aggregated by month for the HL hours.  Use the standard charting filters to make changes.
 == Related Reports ==
@@ Line 36: / Line 46: @@
 * EIA 861M Detail
 * Capacity Change
+* CEMS
   ==

Difference between revisions of "CEMS"