Skip to content

Ancillary Service Plan

Ancillary Service Plan

This section describes interfaces used to retrieve the Ancillary Service Plan for the DAM market. The interface returns hourly values for the next 7 days (168 hours)

The request message would use the following message fields:

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

The corresponding response messages would use the following message fields:

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

The payload structure is described by the following diagram:

ASServicePlan

The values of ‘value1’ identify the total scheduled MW capacity for the given AS type.

The following is an XML example:

<ns1:ASServicePlan xmlns:ns0="http://www.ercot.com/schema/2007-05/nodal/eip/il"
    xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
    <ns1:ASServicePlan>
        <ns1:asType>Reg-Up</ns1:asType>
        <ns1:Schedule>
            <ns1:time>2023-04-19T00:00:00-05:00</ns1:time>
            <ns1:ending>2023-04-19T01:00:00-05:00</ns1:ending>
            <ns1:value1>271.0</ns1:value1>
        </ns1:Schedule>
        <ns1:Schedule>
            <ns1:time>2023-04-19T01:00:00-05:00</ns1:time>
            <ns1:ending>2023-04-19T02:00:00-05:00</ns1:ending>
            <ns1:value1>219.0</ns1:value1>
        </ns1:Schedule> … </ns1:ASServicePlan>
    <ns1:ASServicePlan>
        <ns1:asType>Reg-Down</ns1:asType>
        <ns1:Schedule> ... </ns1:Schedule>
    </ns1:ASServicePlan>
    <ns1:ASServicePlan>
        <ns1:asType>RRS</ns1:asType>
        <ns1:Schedule> ... </ns1:Schedule>
    </ns1:ASServicePlan>
    <ns1:ASServicePlan>
        <ns1:asType>Non-Spin</ns1:asType>
        <ns1:Schedule> ... </ns1:Schedule>
    </ns1:ASServicePlan>
    <ns1:ASServicePlan>
        <ns1:asType>ECRS</ns1:asType>
        <ns1:Schedule> ... </ns1:Schedule>
    </ns1:ASServicePlan>
</ns1:ASServicePlan>