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Exceptional Fuel Cost (EFC)

Exceptional Fuel Cost (EFC)

During the Adjustment Period, a QSE representing a Resource may submit Exceptional Fuel Cost as a volume-weighted average fuel price for use in the Mitigated Offer Cap (MOC) calculation for that Resource. The following diagram describes the structure of an Exceptional Fuel Cost Bid:

EFC Bid Structure

The following table describes the items used for an Exception Fuel Cost submission:

Element Req? Datatype Description Values
startTime K dateTime Start time for bid Valid start hour boundary for trade date
endTime K dateTime End time for bid Valid end hour boundary for trade date
externalId N string External ID QSE supplied
expirationTime N dateTime Time of bid expiration Valid time during the trade date
resource K string Resource Valid resource name
WeightedAvgFuelPrice/startTime Y dateTime Start time for WAFP Valid hour boundary
WeightedAvgFuelPrice/endTime Y dateTime End time for WAFP Valid hour boundary
WeightedAvgFuelPrice/price Y float Weighted Average Fuel Price The volume-weighted average intraday, same-day and spot price of fuel

The following is an XML example for an EFC submission:

<BidSet xmlns="http://www.ercot.com/schema/2007-06/nodal/ews">
    <tradingDate>2019-03-13</tradingDate>
    <EFC>
        <startTime>2019-03-13T19:00:00-05:00</startTime>
        <endTime>2019-03-14T00:00:00-05:00</endTime>
        <resource>RESOURCE_1</resource>
        <WeightedAvgFuelPrice>
            <startTime>2019-03-13T19:00:00-05:00</startTime>
            <endTime>2019-03-13T22:00:00-05:00</endTime>
            <price>32</price>
        </WeightedAvgFuelPrice>
        <WeightedAvgFuelPrice>
            <startTime>2019-03-13T22:00:00-05:00</startTime>
            <endTime>2019-03-14T00:00:00-05:00</endTime>
            <price>35</price>
        </WeightedAvgFuelPrice>
    </EFC>
</BidSet>

And the corresponding response:

<ns1:BidSet xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
    <ns1:tradingDate>2019-03-13</ns1:tradingDate>
    <ns1:submitTime>2019-03-13T18:13:00-05:00</ns1:submitTime>
    <ns1:EFC>
        <ns1:mRID>QSE1.20190313.EFC.RESOURCE_1 </ns1:mRID>
        <ns1:externalId/>
        <ns1:status>ACCEPTED</ns1:status>
        <ns1:error>
            <ns1:severity>INFORMATIVE</ns1:severity>
            <ns1:text>Successfully processed the ERCOT Exceptional Fuel Cost.</ns1:text>
        </ns1:error>            
    </ns1:EFC>
</ns1:BidSet>