OASIS Energy Market Information Exchange (eMIX) TC

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  • 1.  Ramp intervals

    Posted 09-14-2010 19:20



  • 2.  Re: [emix] Ramp intervals

    Posted 09-14-2010 19:38



  • 3.  RE: [emix] Ramp intervals

    Posted 09-14-2010 20:16



  • 4.  Re: [emix] Ramp intervals

    Posted 09-14-2010 20:40



  • 5.  RE: [emix] Ramp intervals

    Posted 09-14-2010 23:01



  • 6.  RE: [emix] Ramp intervals

    Posted 09-15-2010 09:26



  • 7.  RE: [emix] Ramp intervals

    Posted 09-15-2010 12:39
    The ramp rate curve is a characteristic of the unit that determines whether it will be selected and what the five minute dispatches will look like once the unit is online (e.g when ramping from 100 MW to 200 MW).  It is not strictly part of the three part bid which is purely economic; $/MW, Startup cost and Minimum load cost.  While the nominal ramp rate curve is determined by physical unit characteristics it is possible to submit reduced ramp rate curves that are lower than the units capablity to reduce wear and tear or other "economic" reasons.
    ________________________________________
    From: Toby Considine [tobyconsidine@gmail.com] on behalf of Toby Considine [Toby.Considine@gmail.com]
    Sent: Wednesday, September 15, 2010 2:25 AM
    To: 'Edward G. Cazalet'; emix@lists.oasis-open.org
    Subject: RE: [emix] Ramp intervals
    
    So, if I understand this, ISO markets just set delta T small enough in the ramp periods that they do not care.
    
    The other proposal would be that in EMIX, we defined a generic enumeration object which has two variations: Simple (a number) or ramp (begin rate, end rate)
    
    Another indication might be a “variance allowed”, such that if your [ramp] variation is greater than this, you must divide the intervals.
    
    tc
    
    ________________________________
    "If something is not worth doing, it`s not worth doing well" - Peter Drucker
    ________________________________
    Toby Considine
    TC9, Inc
    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


  • 8.  RE: [emix] Ramp intervals

    Posted 09-15-2010 14:26
    Would we be concerned in this group for transactions associated with
    non-economic bids, i.e., emergency calls? 
    
    Phil
    
    


  • 9.  Re: [emix] Ramp intervals

    Posted 09-15-2010 15:36
    I think not.  By definition these are outside the market.
    
    


  • 10.  Re: [emix] Ramp intervals

    Posted 09-15-2010 15:47
    My initial reaction as well, but NYISO does compensate them at energy prices, though response is completely voluntary.  They're sort of in the "hail Mary" end of the resource spectrum.

    Phil Davis | Senior Manager - Solutions | Schneider Electric Demand Response Resource Center | 3103 Medlock Bridge Road, Suite 100 | Norcross, GA  30071 | 404..567.6090 | phil.davis@us.schneider-electric.com | www.schneider-electric.com


    On Wed, Sep 15, 2010 at 10:36 AM, Crimmins, Sean <SCrimmins@caiso.com> wrote:
    I think not.  By definition these are outside the market.


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  • 11.  RE: [emix] Ramp intervals

    Posted 09-15-2010 15:51
    Difficult call.
    
    Do I want to know how much shed one can get from Building A in an emergency
    (if the answer is anything but "OFF") - yes
    
    An emergency load shed, at some level,  is a pre-executed contract, maybe
    free of cost or whose cost was set as the tariff) , whose performance can be
    called at any time, and whose performance call may not be denied....
    
    tc
    
    
    "If something is not worth doing, it`s not worth doing well" - Peter Drucker
    
    Toby Considine
    TC9, Inc
    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
    
    
    


  • 12.  RE: [emix] Ramp intervals

    Posted 09-15-2010 16:23
    An emergency load shed is not necessarily a pre-executed contract; there can be significant load shed achieved through public appeal, which is neither scheduled nor dispatched. Even emergency load shed in a demand response/interruptible load program is not dispatched on an interval basis, it is deployed through a type of instruction that does not take any ramp information into consideration. Ramp rates are factored in for scheduled or dispatchable resources and typically require some type of two-way communication in order to feedback the response that is factored into the next dispatch interval.
    
    Regards,
    Donna
    
    
    Donna K. Pratt
    Demand Response Market Product Specialist
    New York Independent System Operator
    10 Krey Boulevard
    Rensselaer, NY 12144
    Tel: 518-356-8758