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Subject: RE: [emix] Block power purchases


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

 

 

 

Edward G. Cazalet, Ph.D.

101 First Street, Suite 552

Los Altos, CA 94022

650-949-5274

cell: 408-621-2772

ed@cazalet.com

www.cazalet.com

 

From: Toby Considine [mailto:tobyconsidine@gmail.com] On Behalf Of Toby Considine
Sent: Tuesday, May 11, 2010 5:44 AM
To: emix@lists.oasis-open.org
Subject: [emix] Block power purchases

 

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

  

Email: Toby.Considine@gmail.com

Phone: (919)619-2104

http://www.tcnine.com/

blog: www.NewDaedalus.com

 

 



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