RTD Price Adders

Info

New interface with RTC+B Implementation

This section describes the interface used to retrieve Real-Time Reliability Deployment Price Adders for Energy and Ancillary Services for all the future intervals of the RTD run. The request message would use the following message fields:

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

The structure of RTDPriceAdders is described by the following diagram:

RTPriceAdderORDCs Structure

RTPriceAdderORDC Structure

The following elements are used to report RTD Price Adders:

RTDTimestamp
RepeatedHourFlag
IntervalID
IntervalEnding
IERepeatedHourFlag
SystemLambda
RTRDPA
RTRDPARUS
RTRDPARDS
RTRDPARRS
RTRDPAECRS
RTRDPANSS
RTRRUC
RTRRMR
RTDNCLR
RTDERS
RTDCTIEIMPORT
RTDCTIEEXPORT
RTBLTIMPORT
RTBLTEXPORT
RTOLLSL
RTOLHSL

The following is an XML example:

<ns1:RTDPriceAdders xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
               <ns1:RTDPriceAdder>
                  <ns1:RTDTimestamp>09/08/2025 14:50:03</ns1:RTDTimestamp>
                  <ns1:RepeatedHourFlag>N</ns1:RepeatedHourFlag>
                  <ns1:IntervalID>1</ns1:IntervalID>
                  <ns1:IntervalEnding>09/08/2025 14:55:00</ns1:IntervalEnding>
                  <ns1:IERepeatedHourFlag>N</ns1:IERepeatedHourFlag>
                  <ns1:SystemLambda>18.0756</ns1:SystemLambda>
                  <ns1:RTRDPA>0.0</ns1:RTRDPA>
                  <ns1:RTRDPARUS>0.0</ns1:RTRDPARUS>
                  <ns1:RTRDPARDS>0.0</ns1:RTRDPARDS>
                  <ns1:RTRDPARRS>0.0</ns1:RTRDPARRS>
                  <ns1:RTRDPAECRS>0.0</ns1:RTRDPAECRS>
                  <ns1:RTRDPANSS>0.0</ns1:RTRDPANSS>
                  <ns1:RTRRUC>1849.72</ns1:RTRRUC>
                  <ns1:RTRRMR>0.0</ns1:RTRRMR>
                  <ns1:RTDNCLR>0.0</ns1:RTDNCLR>
                  <ns1:RTDERS>0.0</ns1:RTDERS>
                  <ns1:RTDCTIEIMPORT>0.0</ns1:RTDCTIEIMPORT>
                  <ns1:RTDCTIEEXPORT>0.0</ns1:RTDCTIEEXPORT>
                  <ns1:RTBLTIMPORT>0.0</ns1:RTBLTIMPORT>
                  <ns1:RTBLTEXPORT>0.0</ns1:RTBLTEXPORT>
                  <ns1:RTOLLSL>15684.33</ns1:RTOLLSL>
                  <ns1:RTOLHSL>90435.97</ns1:RTOLHSL>
               </ns1:RTDPriceAdder>
</ns1:RTDPriceAdders>