I'd certainly vote for that.
How does http://der.lbl.gov/ relate to
http://certs.lbl.gov/certs-der.html or
http://certs.lbl.gov/certs-der-micro.html?
The second link has Chris's name at bottom.
I'll add this to our list:
"A microgrid is a localized grouping of electricity sources and loads
that normally operates connected to and synchronous with the traditional
centralized grid (macrogrid), but can disconnect and function
autonomously as physical and/or economic conditions dictate. "
Thanks,
-A
Girish Ghatikar wrote:
> In addition to the link David Holmberg sent earlier, please see the
> following link for more information on Microgrids --
> http://der.lbl.gov/
>
> If the TC is interested, I can consider checking with LBNL Micro Grids
> expert, Chris Marnay, for a presentation at TC meeting.
>
> Thanks,
> Rish
>
> Holmberg, David wrote:
>>
>> I don’t think I agree with any of the “interesting additions”, except
>> that every microgrid should have some storage to allow meeting
>> typical demand requirements. I’m not sure what “driven by DER” means.
>> Certainly there has to be some DER. The definition and value of high
>> reliability is in the eyes of the beholder.
>>
>> David
>>
>> *From:* Anne Hendry [mailto:]
>> *Sent:* Friday, March 19, 2010 2:59 PM
>> *To:*
>> *Subject:* Re: [emix] defining terms -- microgrid
>>
>> Yes, the primary recurring attributes seem to be:
>>
>> - can operate independently from grid or in parallel
>> - can seamlessly move from one mode to the other
>> - independently controlled at the local level, no need for central
>> control
>> - driven by DER, co-locates generation and load
>> - highly reliable
>>
>> Interesting additional notes from the survey presentation at the same
>> site are the 'points of varying agreement'
>> - generation capacity must be < 1 KW
>> - must contain > 1 generation source
>> - must connect to the grid at a single point
>> - must contain storage (batteries, etc)
>> - must be able to meet full load requirement
>>
>>
>> -A
>>
>>
>> Holmberg, David wrote:
>>
>> They all agree as far as I can tell. I like the
>> http://www.electricdistribution.ctc.com/microgrids.htm, along with
>> the EI idea of hierarchy put together.
>>
>> David
>>
>> *From:* Anne Hendry [mailto:]
>> *Sent:* Friday, March 19, 2010 2:49 AM
>> *To:* <mailto:>
>> *Subject:* [emix] defining terms -- microgrid
>>
>>
>> We've been using the term microgrid (among others) frequently and
>> today it came up again but with the thought it might also be
>> applicable to subsystems within the 'macrogrid'. At the same time, in
>> the Dutch 'microgrid' paper, they use the term Virtual Power Plant
>> (not so much a microgrid, but more of a role a microgrid may assume).
>> 'Microgrid' is used and defined differently by different entities and
>> the definition is evolving, as are most in this space, and new terms
>> are devleoping. Perhaps it would be helpful to start a glossary for
>> terms like these we may use in the spec so everyone understands the
>> definition as they are used by EMIX? The defining process may have
>> the added value of generating more clearly articulated scope and
>> price communication requirements.
>>
>> For instance, below are several different defs/characteristics for
>> microgrid I've run across recently. Each specs a different set of
>> characteristics from which we could generate an amalgam of those (and
>> any from other sources) characteristics most relevant to EMIX and
>> perhaps then define some use cases using these characteristics to
>> drive element declarations/definitions?
>>
>> Just throwing this out, as an example, to start gathering glossary
>> terms.
>>
>> -A
>>
>> EI spec:
>> "Small, local versions of the bulk power grid that optimize the local
>> distribution system and may include local generation and storage. A
>> microgrid may contain smaller microgrids and may be part of a larger
>> microgrid; communication interface at the edge of each microgrid is
>> the same."
>>
>> http://eetd.lbl.gov/CERTS/pdf/mg-pesc04.pdf
>> Subsystem of generation and associated loads that can separate from
>> the distribution system to isolate from disturbances without harming
>> the transmission grid's integrity and providing higher local
>> reliability by islanding generation and load together. Allows for
>> local control of distributed generation, eliminating the need for
>> central dispatch.
>> /
>> /From NAESB report to NIST
>> http://www.naesb.org/pdf4/interimsmartgridroadmapnistrestructure.pdf
>> "electric island"
>>
>> >From http://www.electricdistribution.ctc.com/microgrids.htm
>> A microgrid, a local energy network, offers integration of DER with
>> local electric loads, which can operate in parallel with the grid or
>> in an intentional island mode to provide a customized level of high
>> reliability and resilience to grid disturbances. This advanced,
>> integrated distribution system addresses the need for application in
>> locations with electric supply and/or delivery constraints, in remote
>> sites, and for protection of critical loads and economically
>> sensitive development. By operating microgrid in the islanding mode,
>> critical loads can continue to operate, impervious to grid
>> disturbance events.
>>
>> http://certs.lbl.gov/certs-der-micro.html
>> CERTS Microgrid:
>> A key feature of a microgrid, is its ability, during a utility grid
>> disturbance, to separate and isolate itself from the utility
>> seamlessly with little or no disruption to the loads within the
>> microgrid (e.g., in the CERTS Microgrid concept, no impacts on power
>> quality). Then, when the utility grid returns to normal, the
>> microgrid automatically resynchronizes and reconnects itself to the
>> grid, in an equally seamless fashion. A critical feature of the CERTS
>> Microgrid is its presentation to the surrounding distribution grid as
>> a single self-controlled entity. A CERTS Microgrid appears to the
>> grid as indistinguishable from other customer sites that do not
>> include DER. This presentation means that the microgrid avoids many
>> of the current concerns associated with integrating DER, such as how
>> many DER the system can tolerate before their collective electrical
>> impact begins to create problems like excessive current flows into
>> faults and voltage fluctuations. The peer-to-peer concept insures
>> that no single component, such as a master controller or a central
>> storage unit, is required for operation of the microgrid. Therefore,
>> by its very design, the CERTS Microgrid can continue operating with
>> loss of an individual component or generator.
>>
>> >From http://www.electricdistribution.ctc.com/microgrids.htm
>> http://www.electricdistribution.ctc.com/pdfs/Microgrid_Assessment_Phase_1.pdf
>> : (slide 4, also more detail at slides 9-11)
>> No clear definition, but characteristics include ability to operate
>> 'islanded' or 'grid parallel', and to switch seamlessly between these
>> two modes, and to include significant DER capacity; driven by DER
>> technology rather than by energy service requirements.
>>
>> http://green.venturebeat.com/2009/10/29/microgrids-a-21b-market-in-the-making/
>>
>> Smaller-scale electrical systems spanning college campuses,
>> municipalities and business parks, where energy is generated, stored
>> and very closely managed on an intensely local level. Without being
>> hooked into one of the larger national grids, there are less likely
>> to be disruptions due to peak demand or excessive power loads. Easier
>> to do DR. Can store enough energy to keep power flowing during
>> blackouts or other disruptions. This makes them ideal for emergency
>> services, hospitals, and of course, the military.
>>
>
