RE: [emix] Do we need reserves?

I agree, though in a grand sense, everything above base load is an option/reserve of some sort. The biggest issue for most consumers of these Options will be if they are there reliably in sufficient quantity. I’m referring to NERC/FERC reliability requirements and to the ongoing debate whether DR resources can be counted as reliability reserves for purposes of NERC reporting. Is there a situation where something is an Option, but that Option does not have the option (little o) of not being there?

DR can be managed statistically, and generators are considered more reliable that they often are. However, reliability rules as constituted might require such Options have a tag about whether they are physical or statistical. The use would be for compliance rather than actual practice.

Phil Davis

From: Toby Considine [mailto:tobyconsidine@gmail.com] On Behalf Of Toby Considine
Sent: Thursday, October 28, 2010 5:30 PM
To: emix@lists.oasis-open.org
Subject: [emix] Do we need reserves?

Ed C and I were comparing notes this afternoon, and it struck me that Reserves are just Options.

Recall that the core EMIX types are Emix, Options, and Resources. All three of them have a Product as one of their elements. I got to wondering whether Option, whose current definition is that from the CIM, and reserves are the same.

A reserve is a promise to respond if asked within a certain time frame. If that promise is made by a slow starting generator, then it cannot make that promise unless it is already spinning. Hence the term Spin-Reserve.

An option is a promise to sell a product at a set price, if asked within a period. The CIM option includes a response time to provide the product.

I think that all the reserves are *really* Option Products. The difference between Spinning Reserve, Non-Spinning Reserve, and Operating Reserve is the warranted response time within the option. Options currently do not have a start time or duration in our schema. Clearly they must have a scheduled duration, unless they are eternal.

I think options could have their own WS-Calendar sequence, fully scheduled. That sequence could be a single interval. (This generator is spinning reserve for the rest of the day.) It could be a set of intervals. (Weekdays from 11:00 to 6:00 for the next month, this generator promises to respond in 10 minutes to provide 50 MW of power for up to 5 hours) The 50MW of power for up 5 hours is the Product. The Response time is the optionExcerciseLeadTime as defined in the CIM Option we already have. Weekdays from 11:00 to 6:00 for the next month is simply a Sequence.

This approach converts all reserves into classes of options, some for different products…

Please discuss.

“It is difficult to get a man to understand something, when his salary depends upon his not understanding it” -- Upton Sinclair.

Toby Considine
TC9, Inc

OASIS Technical Advisory Board
TC Chair: oBIX & WS-Calendar

TC Editor: EMIX, EnergyInterop

U.S. National Inst. of Standards and Tech. Smart Grid Architecture Committee

Email: Toby.Considine@gmail.com
Phone: (919)619-2104

http://www.tcnine.com/
blog: www.NewDaedalus.com

________________________________________________________________________
This email has been scanned for SPAM content and Viruses by the MessageLabs Email Security System.
________________________________________________________________________

emix message