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Subject: Comments on WD03, "outside of Envelope"

Comments on “outside if Envelope” elements fromWD03, table beginning with line 90, page 8.


The classification of energy products (“type”) including the following. Natural Gas, ElectricReserve, FrequencyRegulation, VoltageSupport, ElectricCapacity, in un-normalized and overspecific and vague at the same time.


There are two parts to this issue.

1)      Natural Gas, Electricity, Thermal (Storage or Geo, or…) are good outside of the envelope types.

The other elements, all varieties of Electricity Services should be delaminated into their constituent features. I think the electricity reserves are classified based upon three critical parameters:

-          Response Time

-          Duration

-          Cycle Time

(Alas, I am not clear on a precise definition of Cycle Time yet)

The big three are supplemented for some purposes with the additional attributes “Synched with the grid (Y/N)” and “Blackstart Capable (Y/N)” (meaning can it start when the grid is not hot, i.e., black). Some services must be on-line and /or subject to automatic control during the market window.

The different services are sold for different prices. vices, sold in different markets are roughly as follows:

-          Regulation services provide response in less than a minute, for durations of a few minutes, and must be ready to called upon again in minutes

-          Spinning Reserve must be on-line, may have required response time ranging from seconds to as long as 10 minutes, may be required to perform for between 10 to 120 minutes, and is acceptably not available again for days.

-          Supplemental Reserve must respond in less than 10 minutes for periods of 10 to 120 minutes, and is acceptably not available again for days.

-          Replacement Reserve must be able to respond in less than 30 minutes, for a duration of two hours, and is acceptably not available again for days.

-          Voltage Control must have a response time in seconds, has a duration of seconds, and be available for re-use continuously.

As far as national standards with precise definitions go, there are none-which is a good reason in itself to specify the capabilities and not parameters, and not the service names. As the requirements for performance are of the “meet or exceed” type, one can easily imagine offering the same capability to multiple markets, and accepting the best bids available


So what does this say to the Building Owner, whom we wish to engage in the smart grid through economic signals? Well, it tells him that if he can spend X to respond to the replacement reserve market, and is already able to respond in 25 minutes, and if spending an additional Y gets him a 5 minute reduction in response time, then he can bid into the supplemental reserve level as well. He can then examine the markets and determine if this additional cost is worthwhile.


I have been thinking a lot about storage lately. In particular, I have been thinking that as the building occupants want things other than electricity, they can store things other than electricity to support DR and load shifting.


High rises use a lot of energy to pump water to roof-top storage to create water pressure on the higher floors. Depending on capacity, it is straightforward to use this service as a DR-capable or price-sensitive storage system.


When I look at the list above, though, I wonder whether a high-rise, or group of high rises, could provide regulation services as well using the same local pump storage. If not grid scale, could they do so for a microgrid, say for a 16 block region in a downtown? If so, this might change the payback for the building owner, and thereby change the marginal decision to add such technology to a building.


By enabling a service to be offered for sale in multiple markets, we will encourage more services. By basing their sale on scalar attributes, we allow for the refinement of the standards over time. (Example:  What performance should a regulation Service offer when in a micro-grid purporting to deliver digital quality power?)


It is unclear to me whether these attributes other than type are inside the envelope or outside the envelope.  My tendency is to put them in, as they are indicators of market information, not “toaster” information.


"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


blog: www.NewDaedalus.com



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