Aggregated Ancillary Service Offer Curves

This section describes interfaces used to retrieve aggregated ancillary service offer curves. This interface will return the full day data for DAM run for the requested operating day. For the RTM MarketType, StartTime and EndTime can be used to return timeframe of interest.

The request message would use the following message fields:

Message Element	Value
Header/Verb	get
Header/Noun	AggregatedASOfferCurves
Header/Source	Market participant ID
Header/UserID	ID of user
Request/OperatingDate	Day of interest
Request/MarketType	DAM or RTM
Request/StartTime	Start time of interest for RTM Market Type
Request/EndTime	End time of interest for RTM Market Type

The corresponding response messages would use the following message fields:

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

The payload structure is described by the following diagrams, where there is one curve for each AS type per hour.

For the RTM MarketType, the last SCED run time is returned in the PriceCurve/startTime element.

For each point on the AggregatedASOfferCurve, the xvalue identifies price value and y1value indicates megawatt level.

The following is an XML example:

<ns1:AggregatedASOfferCurves xmlns:ns0="http://www.ercot.com/schema/2007-05/nodal/eip/il"
    xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>Reg-Up</ns1:asType>
        <ns1:marketType>DAM</ns1:marketType>
        <ns1:PriceCurve>
            <ns1:startTime>2023-03-08T00:00:00-06:00</ns1:startTime>
            <ns1:endTime>2023-03-08T01:00:00-06:00</ns1:endTime>
            <ns1:CurveData>
                <ns1:xvalue>5.35</ns1:xvalue>
                <ns1:y1value>2125.0</ns1:y1value>
            </ns1:CurveData>
        </ns1:PriceCurve>
        <ns1:PriceCurve>
            <ns1:startTime>2023-03-08T01:00:00-06:00</ns1:startTime>
            <ns1:endTime>2023-03-08T02:00:00-06:00</ns1:endTime>
            <ns1:CurveData>
                <ns1:xvalue>15.0</ns1:xvalue>
                <ns1:y1value>3108.0</ns1:y1value>
            </ns1:CurveData>
        </ns1:PriceCurve> 
        … 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>Reg-Down</ns1:asType>
         ... 
        </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>On-Non-Spin</ns1:asType>
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>Off-Non-Spin</ns1:asType>
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>RRSUF</ns1:asType> 
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>RRSFF</ns1:asType> 
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>RRSPF</ns1:asType> 
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>ECRSS</ns1:asType> 
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>ECRSM</ns1:asType> 
        ... 
    </ns1:AggregatedASOfferCurve>
    <ns1:AggregatedASOfferCurve>
        <ns1:asType>OFFEC</ns1:asType> 
        ... 
    </ns1:AggregatedASOfferCurve>
</ns1:AggregatedASOfferCurves>

<ns1:AggregatedASOfferCurves xmlns:ns0="http://www.ercot.com/schema/2007-05/nodal/eip/il"
    xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">                           
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>Reg-Up</ns1:asType>                                                  
        <ns1:marketType>RTM</ns1:marketType>                                             
        <ns1:PriceCurve>                                                                 
            <ns1:startTime>2024-06-01T00:05:00-06:00</ns1:startTime>                     
            <ns1:CurveData>                                                              
                <ns1:xvalue>5.35</ns1:xvalue>                                            
                <ns1:y1value>2125.0</ns1:y1value>                                        
            </ns1:CurveData>                                                             
        </ns1:PriceCurve>                                                                
        <ns1:PriceCurve>                                                                 
            <ns1:startTime>2024-06-01T00:10:00-06:00</ns1:startTime>                     
            <ns1:CurveData>                                                              
                <ns1:xvalue>15.0</ns1:xvalue>                                            
                <ns1:y1value>3108.0</ns1:y1value>                                        
            </ns1:CurveData>                                                             
        </ns1:PriceCurve>                                                                
        …                                                                                
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>Reg-Down</ns1:asType>                                                
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>On-Non-Spin</ns1:asType>                                             
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>Off-Non-Spin</ns1:asType>                                            
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>RRSUF</ns1:asType>                                                   
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>RRSFF</ns1:asType>                                                   
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>RRSPF</ns1:asType>                                                   
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>ECRSS</ns1:asType>                                                   
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>ECRSM</ns1:asType>                                                   
        ...                                                                              
    </ns1:AggregatedASOfferCurve>                                                        
    <ns1:AggregatedASOfferCurve>                                                         
        <ns1:asType>OFFEC</ns1:asType>