Capacity Trade (CT)

The following diagram describes the structure of a Capacity Trade:

CapacityTrade Structure

The CapacitySchedule structure is identical to the structure described previously in this document. The submission of a trade requires a patching trade to be submitted by the counter party. The following table describes the required fields:

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
buyer	K	string	Trade buyer	Valid QSE
seller	K	string	Trade seller	Valid QSE
otherPartySubmitted	N	Boolean	For querying purposes only: True if trade was entered by other party	true (default) or false
tradeID	N	string	reserved for future use
CapacitySchedule/startTime	N	dateTime	not used	not used
CapacitySchedule/endTime	N	dateTime	not used	not used
CapacitySchedule/ TmPoint/time	Y	dateTime	Absolute time for beginning of interval	Valid time within the trading date
CapacitySchedule/ TmPoint/ending	N	dateTime	Absolute time for end of interval	Valid time within the trading date
CapacitySchedule/ TmPoint/value1	Y	float	Megawatts	>= 0

The following is an XML example for a CapacityTrade:

<BidSet xmlns="http://www.ercot.com/schema/2007-06/nodal/ews" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ercot.com/schema/2007-06/nodal/ews ErcotTransactions.xsd">
    <tradingDate>2008-01-01</tradingDate>
    <status/>
    <mode/>
    <CapacityTrade>
        <startTime>2008-01-01T00:00:00-05:00</startTime>
        <endTime>2008-01-02T00:00:00-05:00</endTime>
        <marketType>DAM</marketType>
        <buyer>AEN</buyer>
        <seller>LCRA</seller>
        <tradeID>TradeID234</tradeID>
        <CapacitySchedule>
            <TmPoint>
                <time>2008-01-01T00:00:00-05:00</time>
                <ending>2008-01-02T00:00:00-05:00</ending>
                <value1>88</value1>
            </TmPoint>
        </CapacitySchedule>
    </CapacityTrade>
</BidSet>

And the corresponding response:

<ns1:BidSet xmlns:ns1="http://www.ercot.com/schema/2007-06/nodal/ews">
    <ns1:tradingDate>2008-06-14</ns1:tradingDate>
    <ns1:CapacityTrade>
        <ns1:mRID>AEN.20080614.CT.AEN.LCRA</ns1:mRID>
        <ns1:status>ACCEPTED</ns1:status>
        <ns1:error>
            <ns1:severity>INFORMATIVE</ns1:severity>
            <ns1:text>Successfully processed the ERCOT Capacity Trade.</ns1:text>
        </ns1:error>
    </ns1:CapacityTrade>
</ns1:BidSet>