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Subject: FW: [smartgrid-interest] Draft Charter - Energy Market InformationExchange

I thought this conversation, below, from the smart grid discussion list, is in good dialog with Brian’s note from this morning…


I am delighted the 6LOPAN and Zigbee issues ar4e coming to the fore.



"A man should never be ashamed to own that he has been in the wrong, which is but saying ... that he is wiser today than yesterday." -- Jonathan Swift

Toby Considine

Facilities Technology Office
University of North Carolina
Chapel Hill, NC


Email: Toby.Considine@ unc.edu
Phone: (919)962-9073


blog: www.NewDaedalus.com



From: William Cox [mailto:wtcox@CoxSoftwareArchitects.com]
Sent: Tuesday, March 31, 2009 12:08 PM
To: michel@universal-devices.com
Cc: smartgrid-interest@lists.oasis-open.org; 'Toby Considine'
Subject: Re: [smartgrid-interest] Draft Charter - Energy Market Information Exchange


Michel --

Good point for discussion.

My view is that the key interactions are the home/business/internet side, and that for bandwidth-limited devices/networks the important thing is to have a consistent information model of what is exchanged, whether it's the messages (which may or may not have additional content) or more information.

So if the information model as expressed in the XML is consistent with smaller/slower connections, the information can be communicated and acted on in a consistent way across homes, buildings (in general, suggesting non-homes), industrial facilities, and so forth.

There are a number of alternate serializations of XML that take less bandwidth, and a communications aggregator/gateway could do a variety of things with the information streams. Small embedded devices can implement an entire web services stack, and may be usable in the future in home control/gateway environments -- the lesson from the DMTF (Distributed Management Task Force) is that a fairly complex management stack is now implemented in every NIC/ethernet card at a cost differential of roughly $1.

The full information model may be (initially) of less use in the Home to Grid space, but some of my talks and papers discuss use of forward price information and bids for homes, so additional information from the EMIX model will be useful in the future.

(see, for instance, my presentation (and paper with Toby Considine) from Grid-Interop 2008 on the page at http://www.grid-interop.com/2008/default.asp#session_712 .  The presentation PDF seems messed up, at least on a Macintosh - font issues  - but can be found from http://www.coxsoftwarearchitects.com/Pages/C_Energy.html and directly at http://www.coxsoftwarearchitects.com/Resources/Grid-Interop2008/Cox%2BConsidine%20Grid-Interop%202008%20Slides.pdf


bill cox

Michel Kohanim wrote:

Hi Bill,


This is an excellent start and one which I truly believe in.


One comment though: this document assumes that all transactions will be done using XML/SOAP/Web Services (I understand the connection to OASIS). In this respect, we are already assuming that each actor has enough bandwidth to support such transactions, right? What are the provisions for bandwidth constrained actors?


Again, this is an excellent start and thanks for putting the document together.


With kind regards,



Michel Kohanim, C.E.O

Universal Devices, Inc.


(p) 818.631.0333

(f) 818.708.0755




From: William Cox [mailto:wtcox@CoxSoftwareArchitects.com]
Sent: Monday, March 30, 2009 7:43 PM
To: smartgrid-interest@lists.oasis-open.org
Cc: Toby Considine
Subject: [smartgrid-interest] Draft Charter - Energy Market Information Exchange


I've attached a draft charter for the proposed OASIS Energy Market Information Exchange (eMIX) Technical Committee.

This TC is intended to address the prices, market characteristics, and other information for energy trading, buying, and selling. I was inspired to start working on this from discussions in and around the NIST Building-to-Grid and Industry-to-Grid Domain Expert Working Groups, and continued interest from first round reviewers and from people attending GridEcon 2009 in Chicago (http://www.gridecon.com -- slides are available on line at the agenda link).

>From my perspective as an enterprise software architect, this fits into a simple three layer stack with interoperation protocols (how to communicate) as the fundamental layer. I put the Energy Interoperation TC/OpenADR work here, with parts of the message payload in the next layer.

The middle layer is what is communicated -- for markets, things like price, quantity, units, time (of use), and characteristics of the energy sold -- from source (e.g. gas-fired plants, coal, solar, coal plant with scrubbers, wind) to derived information (e.g. carbon data), and also trading information (is this a bid, a price quote, an accepted transaction?).

The goal is to create an XML vocabulary that can be used in a broad range of market exchanges with minimal differences (and where there are differences, arranged in a simple way) for the various consumers of the information.

The third layer is the market design and definition; since markets have varying degrees of complexity I'm leaving this alone for now :-). This is a potentially complex area, and an interesting one. Accordingly, I'd like to carefully define the EMIX work to focus on layer two.

I invite you to participate in a discussion on how to improve this charter, as well as the sorts of characteristics that are important to energy markets.

If you would like to be listed on the charter when submitted as a supporter, please contact me or Toby Considine.

Comments to me or (preferably) to the list. Please reference line numbers where appropriate.


William Cox
Email: wtcox@CoxSoftwareArchitects.com
Web: http://www.CoxSoftwareArchitects.com
+1 862 485 3696 mobile
+1 908 277 3460 fax

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