Toby,
You are correct
that the eMIX draft does not deal with rates of delivery or block purchases.
The TeMIX White
Paper is focused primarily on contracts with constant rates of delivery over specified
intervals with a start and end time.
Thus it deals with your example of one MWh per hour ( a rate-of-delivery
of 1 MW) not being an offer of 32 MWh for 15min ( a rate-of-delivery of 128 MW).
Block purchases
are easily handled in eMIX or TeMIX with a designation of an offer as
"all-or-none" which is a term used in equity markets for example.
It is outside the
scope of eMIX, but the process of negotiating block contracts for energy or any
other commodity is important.
I some markets
only block contracts are traded. If
your block is smaller you can't trade it in that market.
Small block
offers should not be a problem in most markets.
In other markets
with sufficient liquidity larger blocks may be purchased by ( or sold to ) more
than one party which increases opportunities for the sellers of large blocks.
Additionally,
markets for power are actually a sequence of financial futures and forward
physical markets ending with day-ahead and real-time markets. Large block sellers and buyers have many
opportunities to build a position to match their block requirement, including
reversing a position if they can't achieve a block position and buying an
option for a block. Large block
sellers may have long-term contracts as well.
Ed
Block power purchases
We speak often as if all power infinitely granular. Many
purchases have and will always have limits and rates.
If you do not buy at least 20 MWH for 5 straight
hours, it’s not worth turning my small generator on.
My DR is limited to turning off the lights or turning off
the building. I can offer you half a building. I cannot give you DR fore two
buildings, even at twice the price I would offer one.
My offer of one MWH for 8 hours between 2PM and 10PM, is not
an offer of 32 MWH between 2:45 3:00
Maxima, minima, and rates are not adequately dealt with in
the last draft.
I welcome suggestions
tc
"Energy
and persistence conquer all things." -- Benjamin Franklin
Toby Considine
TC9, Inc
OASIS Technical Advisory Board
TC Chair: oBIX & WS-Calendar
TC Editor: EMIX,
EnergyInterop
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Email: Toby.Considine@gmail.com
Phone: (919)619-2104
http://www.tcnine.com/
blog: www.NewDaedalus.com
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