RT Clearing Prices for Capacity by SCED Interval

Info

New interface with RTC+B Implementation

This section describes interfaces used to retrieve Real-Time Clearing Prices for Capacity by SCED Interval. The request message would use the following message fields:

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

The structure of SCEDMCPCs is described by the following diagram:

SCEDMCPCs Structure

SCEDMCPC Structure

The following elements are used to report Real-Time Clearing Prices for Capacity by SCED Interval:

  • SCED Timestamp
  • Repeated Hour Flag
  • AS Type
  • MCPC

The following is an XML example:

<ns1:SCEDMCPCS xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
               <ns1:SCEDMCPC>
                  <ns1:SCEDTimestamp>10/01/2025 11:10:25</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ASType>ECRS</ns1:ASType>
                  <ns1:MCPC>14.99</ns1:MCPC>
               </ns1:SCEDMCPC>
               <ns1:SCEDMCPC>
                  <ns1:SCEDTimestamp>10/01/2025 11:10:25</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ASType>NSPIN</ns1:ASType>
                  <ns1:MCPC>14.99</ns1:MCPC>
               </ns1:SCEDMCPC>
               <ns1:SCEDMCPC>
                  <ns1:SCEDTimestamp>10/01/2025 11:10:25</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ASType>REGDN</ns1:ASType>
                  <ns1:MCPC>19.99</ns1:MCPC>
               </ns1:SCEDMCPC>
               <ns1:SCEDMCPC>
                  <ns1:SCEDTimestamp>10/01/2025 11:10:25</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ASType>REGUP</ns1:ASType>
                  <ns1:MCPC>14.58</ns1:MCPC>
               </ns1:SCEDMCPC>
               <ns1:SCEDMCPC>
                  <ns1:SCEDTimestamp>10/01/2025 11:10:25</ns1:SCEDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:ASType>RRS</ns1:ASType>
                  <ns1:MCPC>5.61</ns1:MCPC>
               </ns1:SCEDMCPC>
</ns1:SCEDMCPCS>