SOG LMPs

Info

New interface with RTC+B Implementation

This section describes interfaces used to retrieve SOG 5-min SCED LMPs.
The request message would use the following message fields:

Message Element Value
Header/Verb get
Header/Noun SOGLMPs
Header/Source Market participant ID
Header/UserID ID of user
Request/StartTime Start time of interest
Request/EndTime End time of interest

The corresponding response messages would use the following message fields:

Message Element Value
Header/Verb reply
Header/Noun SOGLMPs
Header/Source ERCOT
Reply/ReplyCode Reply code, success=OK, error=ERROR or FATAL
Reply/Error Error message, if error encountered
Payload/ SOGLMPs

The structure of SOGLMPs is described by the following diagram:

SOGLMPs Structure

SOGLMP Structure

The following elements are used to report prices for SOTG/SODG 5-min SCED LMPs:

  • SCED Timestamp
  • Repeated Hour Flag
  • Resource Type
  • Resource Name
  • Station Name
  • Voltage Level
  • Meter Name
  • Meter LMP
  • RTRDPA
  • Final LMP

The following is an XML example:

      <ns1:SOGLMPs xmlns:ns0="http://www.ercot.com/schema/2007-05/nodal/eip/il" xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
               <ns1:SOGLMP>
                  <ns1:SCEDTimestamp>10/08/2025 12:00:29</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ResourceType>SODG</ns1:ResourceType>
                  <ns1:ResourceName>Resource1 </ns1:ResourceName>
                  <ns1:StationName>Station2</ns1:StationName>
                  <ns1:VoltageLevel>138.0</ns1:VoltageLevel>
                  <ns1:MeterName>123456</ns1:MeterName>
                  <ns1:MeterLMP>-2.31</ns1:MeterLMP>
                  <ns1:RTRDPA>0.0</ns1:RTRDPA>
                  <ns1:FinalLMP>-2.31</ns1:FinalLMP>
               </ns1:SOGLMP>
               <ns1:SOGLMP>
                  <ns1:SCEDTimestamp>10/08/2025 12:00:29</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ResourceType>SODG</ns1:ResourceType>
                  <ns1:ResourceName>Resource2</ns1:ResourceName>
                  <ns1:StationName>Station2</ns1:StationName>
                  <ns1:VoltageLevel>138.0</ns1:VoltageLevel>
                  <ns1:MeterName>9876543</ns1:MeterName>
                  <ns1:MeterLMP>-2.31</ns1:MeterLMP>
                  <ns1:RTRDPA>0.0</ns1:RTRDPA>
                  <ns1:FinalLMP>-2.31</ns1:FinalLMP>
               </ns1:SOGLMP>
      </ns1:SOGLMPs>