Ancillary Service Obligations
Ancillary Service Obligations
The purpose of this notification message is to notify a QSE of DAM or SASM Ancillary Service Obligations.
The following response message structure will be used for Ancillary Service Obligations notification:
Message Element Value Header/Verb created Header/Noun ASObligations Header/Source ERCOT Reply/ReplyCode Reply code, success=OK, error=ERROR or FATAL Reply/Error Error message, if error encountered Reply/Timestamp Current System Timestamp Payload/ ASObligations
The purpose of this notification message is to notify a QSE of DAM Ancillary Service Obligations.
The following response message structure will be used for Ancillary Service Obligations notification:
Message Element Value Header/Verb created Header/Noun ASObligationsAdvisory
or
ASObligationsFinalHeader/Source ERCOT Reply/ReplyCode Reply code, success=OK, error=ERROR or FATAL Reply/Error Error message, if error encountered Reply/Timestamp Current System Timestamp Payload/ ASObligations The Advisory AS Obligations will be published by 06:00 am of the day ahead market. The Final AS Obligations will be published after DAM is published.
The structure of this message is shown by the following diagrams:
The following table describes the items in the ASObligation payload.
| Element | Datatype | Description | Values |
|---|---|---|---|
| startTime | dateTime | Start time for bid | Valid start hour boundary for trade date |
| endTime | dateTime | End time for bid | Valid end hour boundary for trade date |
| TmPoint/time | dateTime | Absolute time for start of interval | Valid time within trading date |
| TmPoint/ending | dateTime | Absolute time for end of interval | Valid time within trading date |
| TmPoint/value1 | float | Megawatts | Can be up to 5 points after the decimal |
| asType | string | Ancillary service type | ECRS Non-Spin Reg-Down Reg-Up RRS |
| qse | string | Valid QSE | |
| marketType | string | Market type | DAM |
The following is an XML example:
<ns1:ASObligations xmlns:ns0="http://www.ercot.com/schema/2007-05/nodal/eip/il"
xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
<ns1:ASObligation>
<ns1:startTime>2023-04-18T00:00:00-05:00</ns1:startTime>
<ns1:endTime>2023-04-18T01:00:00-05:00</ns1:endTime>
<ns1:TmPoint>
<ns1:time>2023-04-18T00:00:00-05:00</ns1:time>
<ns1:ending>2023-04-18T01:00:00-05:00</ns1:ending>
<ns1:value1>112.2</ns1:value1>
</ns1:TmPoint>
<ns1:asType>ECRS</ns1:asType>
<ns1:qse>QSAMP</ns1:qse>
<ns1:marketType>DAM</ns1:marketType>
</ns1:ASObligation>
<ns1:ASObligation>
<ns1:startTime>2023-04-18T00:00:00-05:00</ns1:startTime>
<ns1:endTime>2023-04-18T01:00:00-05:00</ns1:endTime>
<ns1:TmPoint>
<ns1:time>2023-04-18T00:00:00-05:00</ns1:time>
<ns1:ending>2023-04-18T01:00:00-05:00</ns1:ending>
<ns1:value1>169.3</ns1:value1>
</ns1:TmPoint>
<ns1:asType>Non-Spin</ns1:asType>
<ns1:qse>QSAMP</ns1:qse>
<ns1:marketType>DAM</ns1:marketType>
</ns1:ASObligation>
<ns1:ASObligation>
<ns1:startTime>2023-04-18T00:00:00-05:00</ns1:startTime>
<ns1:endTime>2023-04-18T01:00:00-05:00</ns1:endTime>
<ns1:TmPoint>
<ns1:time>2023-04-18T00:00:00-05:00</ns1:time>
<ns1:ending>2023-04-18T01:00:00-05:00</ns1:ending>
<ns1:value1>66.1</ns1:value1>
</ns1:TmPoint>
<ns1:asType>Reg-Down</ns1:asType>
<ns1:qse>QSAMP</ns1:qse>
<ns1:marketType>DAM</ns1:marketType>
</ns1:ASObligation>
<ns1:ASObligation>
<ns1:startTime>2023-04-18T00:00:00-05:00</ns1:startTime>
<ns1:endTime>2023-04-18T01:00:00-05:00</ns1:endTime>
<ns1:TmPoint>
<ns1:time>2023-04-18T00:00:00-05:00</ns1:time>
<ns1:ending>2023-04-18T01:00:00-05:00</ns1:ending>
<ns1:value1>40.6</ns1:value1>
</ns1:TmPoint>
<ns1:asType>Reg-Up</ns1:asType>
<ns1:qse>QSAMP</ns1:qse>
<ns1:marketType>DAM</ns1:marketType>
</ns1:ASObligation>
<ns1:ASObligation>
<ns1:startTime>2023-04-18T00:00:00-05:00</ns1:startTime>
<ns1:endTime>2023-04-18T01:00:00-05:00</ns1:endTime>
<ns1:TmPoint>
<ns1:time>2023-04-18T00:00:00-05:00</ns1:time>
<ns1:ending>2023-04-18T01:00:00-05:00</ns1:ending>
<ns1:value1>446.7</ns1:value1>
</ns1:TmPoint>
<ns1:asType>RRS</ns1:asType>
<ns1:qse>QSAMP</ns1:qse>
<ns1:marketType>DAM</ns1:marketType>
</ns1:ASObligation>
</ns1:ASObligations>