IEEE SCC21 P1547 Working Group Meeting Minutes April 23–25, 2014 (Las Vegas, NV)
“P1547 Draft Standard for Interconnection and Interoperability of
Distributed Energy Resources with Associated Electric Power Systems Interfaces”
The inaugural meeting of the P1547 Working Group was held in Las Vegas, NV, on April 23–25, 2014.
The attendees (Attachment A) were welcomed by Tom Basso, Chair of IEEE P1547 [note: later,
attendees introduced themselves and their affiliations]. Tom presented the agenda for the three-day
meeting (Attachment B) and introduced Dick DeBlasio, SCC21 Chair and Chair of IEEE Std 1547-2003.
Dick summarized the history of 1547 and reviewed the P1547 (full revision) IEEE Project Authorization
Request (PAR) title, scope, and purpose established at the December 5-6, 2013, meeting and approved
by the IEEE Standards Board. For P1547 revision, Dick and Tom recommended that participants build
from the existing standard structure, rather than approaching the revision from a blank sheet—while
also introducing new material focusing on interoperability and associated interfaces based on the SCC21
IEEE Std 2030 and P2030.2 documents, and, considering P1547 revisions for resolving implementation
issues and usability issues.
Justin Caso, IEEE staff Liaison to SCC21, presented the IEEE required statements (Attachment B, slides 6–
10) on patents, standards meeting conduct, and IEEE standards classification/language (e.g., shall,
should, may). He then asked attendees if they were aware of any patent claims potentially essential to
the P1547 draft text implementation; none were identified.
Information on the IEEE Conformity Assessment Program (ICAP) was presented by Ravi Subramaniam,
Technical Director of ICAP (Attachment C, pgs. C-2 to C-4). The 1547 revision could be a candidate for
ICAP consideration of a formal IEEE standards conformance program. Ravi will further discuss potential
future ICAP meeting(s) for a potential IEEE 1547 conformance program. Questions were raised related
to the potential need for another program, e.g., beyond the “Nationally Recognized Testing Labs (NRTL)”
activities; it was stated that this is a prime consideration for future discussions.
Tom Basso provided an overview of the SCC21 family of standards. Starting with 1547 (distributed
resources interconnection), he quickly summarized the 1547.1 to P1547.8 standards, recommended
practices, and guides, and, the IEEE Std 2030 (Smart Grid interoperability) and P2030.2 (Energy Storage
Systems Interoperability guide) - Attachment B, slides 14–51. Tom then gave an overview of industry
suggestions for changes to 1547, including topics of 1547a (amendment 1 of 1547)—4.1.1., 4.2.3
(voltage ride-through), and 4.2.4 (frequency ride-through)—as well as the 36 topics compiled by
attendees of the May 2012 meeting (Attachment B, slides 51–57).
Presentations were then given by nine people who earlier responded to the December 2013 workshop
call for potential interest and availability to volunteer greater time for this P1547 revision effort.
Attachment C (pgs. C-5 to C-19) has the slides presented by these nine: Jeff Newmiller (DNV GL), Jim
Daley (Facilities Electrical Consulting Services), Mark Siira (ComRent International), John Berdner
(Enphase Energy), Babak Enayati (National Grid), Tom McDermott (University of Pittsburgh), Sudipta
Chakraborty (National Renewable Energy Laboratory [NREL]), John Moura (North American Electric
Reliability Corporation [NERC]), and Abe Ellis (Sandia National Laboratories).
Discussion ensued related to topics raised by these presenters. Tom Basso summarized the primary
constellation of topics as the following: (1) ride-through, (2) penetration, (3) intermittency and
Minutes—P1547 Meeting, Las Vegas, April 23–25, 2014
Page 1
variability of renewable energy technologies, (4) interactive effects, including distribution-transmission
interactive effects, or system-wide effects, (5) communications/interoperability, and (6) testing
requirements. No absolute/mandatory approaches for P1547 revisions were established.
On the second day, April 24, Mark Siira, Chair of P2030.2, announced that the P2030.2 Guide, Draft 7,
had been submitted to IEEE and that the ballot pool is still open.
Tom Basso re-introduced Tom McDermott, who facilitated a conversation on a draft of proposed P1547
revisions that he and several others had developed the previous night in an after-meeting ad-hoc
session. The proposed text included revisions to existing clauses of P1547a, namely, 4.1.1 (Voltage
regulation), 4.2.3 (Voltage), and 4.2.4 (Frequency), and, new proposed P1547 subclauses 5.1.7 (Shortcircuit behavior test) and 5.1.8 (Loss of load behavior test). There was considerable discussion on ridethrough and on the time and frequency values and ranges on the proposed tables in the revised 4.2.3
and 4.2.4 clauses, e.g., Table 1 (Interconnection system default response to abnormal voltages), Table 2
(Default voltage ride-through times), Table 3 (Interconnection system default response to abnormal
frequencies), and Table 4 (Default frequency ride-through times). Philippe Venne volunteered to
provide text on high-voltage ride-through from Hydro-Quebec. Additionally, Marcelo Algrain introduced
draft text proposed for clause 1.3 (Limitations). After discussion, it was agreed that the concepts of that
draft text did not belong in clause 1.3, but that Marcelo would reconsider his proposed concepts
potentially for consideration elsewhere in P1547; Jim Daley volunteered to work with Marcelo on such
revised text. [Note: this information will be posted on the P1547 password-protected web page (IEEE
copyrighted material) in coming weeks with the username and password made available to attendees.]
Next, Tom Basso focused group discussion on other major topics: penetration, intermittency of
renewable energy technologies, interactive effects of functionalities, testing requirements,
“considerations beyond the point of common coupling/system-wide effects,” interfaces, and
interoperability. Discussion on penetration resulted in a majority of attendees agreeing that
penetration should not be pursued in P1547. Discussions on monitoring and information exchange led
to Steve Evans volunteering to draft straw man discussion points to be considered at the next meeting; a
couple of individuals also volunteered to contribute to that. Points of consideration were to change the
size limits in 1547 clause 4.1.6 (Monitoring) and to address aspects of “communications/control” in the
P1547 revision. The day ended with a discussion on the size limitation in 1547 (10 MVA), with some
people promoting raising the number to 20 MVA and others for eliminating the value. A straw man vote
was overwhelmingly in favor of eliminating the number entirely, with the understanding that P1547 will
establish a clarified “distribution” level description/definition as the P1547 demarcation setting it apart
and not establishing “transmission” level requirements in P1547.
On the third and final day, Robert Cummings (NERC) discussed the definition of terms such as
distribution system, transmission system, bulk electricity system, and bulk power system. General
agreement was that the term “distribution system(s)” will be clarified in P1547. Attendees then moved
into further discussion of other issues such as modeling. David Lovelady volunteered to draft some text
on “modeling” for consideration in P1547. Additionally, there was discussion and general agreement on
keeping P1547 text as technology-neutral as practical. Also, points were raised that P1547 should not
be mandating how the utility operates its electric power system equipment and that P1547 should not
be written as a white paper, policy document, or research thesis. Mark Siira promoted that P1547
needs to consider that security should be discussed within 1547. Tom Basso stated that P2030.2
information on security (9 pages) would be made available for consideration as text to be revised for
potential P1547 discussion on security. [Note: this information will also be posted on the P1547
Minutes—P1547 Meeting, Las Vegas, April 23–25, 2014
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password-protected web page (IEEE copyrighted material) in coming weeks with the username and
password made available to attendees.]
Tom Basso spent the last portion of the meeting on the logistics for future work on 1547 (Attachment B,
slides 58–61), highlighting future in-person and virtual meetings, use of the website (e.g., listserv,
password-protected page for drafts), and qualifications to be a Working Group member. Tom and Justin
Caso then facilitated a discussion on how many working group in-person meetings to have each year,
and when and where to have them. The consensus of the group was to have two meetings a year and
that each meeting would last 3.5 days.
Next actions
 The second P1547 Working Group meeting will be June 26 (8 am–5 pm) to June 27 (8 am–noon),
preceded by the P1547.1a (testing procedures Amendment 1) meeting on June 24 (8 am–5 pm) to
June 25 (8 am–noon) in Las Vegas, NV (most likely at the Planet Hollywood Hotel).
 The third 1547 Working Group meeting will be the week of November 4, at NERC HQ in Atlanta, GA.
 Need to line up additional officers (e.g., Vice Chair(s), Secretary) and subgroup leaders for P1547. If
you are interested and available to commit more time to P1547 development, please send an email
to Dick DeBlasio (Dick.DeBlasio@nrel.gov) and Tom Basso (Thomas.Basso@nrel.gov) for
consideration/discussion.
The meeting was adjourned around 12:00 noon.
Respectfully submitted,
Tom Basso, P1547 Chair; Dick DeBlasio, SCC21 Chair; and Don Gwinner, Recorder.
----------------------------------------------------------------------------Attachment A – Attendees
Attachment B – (separate file) Agenda and Background Information
Attachment C – (separate file) Presentations at April 23–25, 2014 Meeting
Minutes—P1547 Meeting, Las Vegas, April 23–25, 2014
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Attachment A – Attendees: P1547 Working Group Meeting April 23–25, 2014
IEEE P1547 Draft Standard for Interconnection and Interoperability of Distributed Energy Resources with
Associated Electric Power Systems Interfaces (Chair: Thomas Basso)
Sponsored by IEEE-SASB Coordinating Committees/SCC21 - Fuel Cells, Photovoltaics, Dispersed
Generation, and Energy Storage (SASB/SCC21)
First Name
Meir
Marcelo
Daniel
Venkat
Tom
David
John
David
Richard
Michael
Jason
Justin
Sudipta
Frances
Mike
Nancy
Robert
James
Herbert
Richard
Paul
Jonathan
Abraham
Babak
Brian J.
Steve
Terry
David
Darrell
Colin
Sigifredo
Robin
Craig
Jason
Last Name
Adest
Algrain
Arjona
Banunarayanan
Basso
Beach
Berdner
Bosack
Bravo
Brigandi
Byerly
Caso
Chakraborty
Cleveland
Coddington
Connelly
Cummings
Daley
Daugherty
DeBlasio
Dolloff
Ehlmann
Ellis
Enayati
Escott
Evans
Fix
Forrest
Furlong
Gault
Gonzalez
Gray
Groeling
Gunawardena
Company Name
SolarEdge Technologies
CAT
Idaho Power
Department of Energy – SunShot
NREL
Portland General Electric
Enphase Energy
Northeast Utilities Service Co.
Southern California Edison
NSTAR
American Electric Power
IEEE-SA
NREL
Xanthus
NREL
Duke Energy
NERC
Facilities Electrical Consulting Services
Electrical Generating Systems Assoc.
NREL
East Kentucky Power
SolarBridge
Sandia National Laboratories
National Grid
ASCO - Emerson Network Power
ASCO
Dominion
ISO New England
Gridco Systems
Smarter Grid Solutions Inc.
Sandia National laboratories
Con Edison of NY
Xcel Energy
Salt River Project
Minutes—P1547 Meeting, Las Vegas, April 23–25, 2014
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First Name
Don
Robert
Patrick
Taylor
Aminul
James
Chinedu
Ruben
Gerald
John C.
John
Kandice
Eddy
Haiwen (Howard)
David
Brian
Leo
Tom
Jonathan
Zarin
Lyman
John
Rohit
Jeffrey
John
Catherine
PRASAD
Robert
Jim
John
Roger
Janette
Karl
Rich
Harish
Ronald
Robert
Jaspreet
Mark
Mark
Last Name
Gwinner
Harris
Healey
Hollis
Huque
Hurtt
Igbokwe
Inzunza
Johnson
Klingel
Kotula
Kubojiri
Lim
Liu
Lovelady
Lydic
Martinez
McDermott
Meyer
Mirza
Morikawa
Moura
Nair
Newmiller
Nunneley
O'Brien
PMSVVSV
Preus
Reilly
Ruddock
Salas
Sandberg
Schoder
Scroggins
Sharma
Shipman
Siciliano
Singh
Siira
Smith
Company Name
NREL
National Rural Electric Cooperative Assn.
United Illuminating Company
Schneider Electric
Electric Power Research Institute (EPRI)
Florida Power and Light
Solectria Renewables' LLC
TMEIC
Basler Electric
Kato Engineering
Dominion Virginia Power
Hawaii Electric Light Co.
Federal Energy Regulatory Commission
Intertek
Siemens PTI
Fronius USA
Consumers Energy
University of Pittsburgh
Idaho Power Company
Central Hudson Gas & Electric Corporation
Morikawa & Associates, LLC
NERC
PacifiCorp
DNV GL
SunSpec Alliance
Salt River Project
Bloom Energy
National Renewable Energy Lab
Reilly Associates
Deep Sea Electronics PLC
SCE
Portland General Electric
CAPS @ FSU
Cummins
Southern Company
Oncor Electric Delivery
Emerson / ASCO Power
Power-One/ABB
ComRent
AEP
Minutes—P1547 Meeting, Las Vegas, April 23–25, 2014
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First Name
Jim
Steve
James
Ravi
Chase
Le
Sylvester
Phil
Philippe
Reigh
Robert
Joseph
Stephen
Tim
Fred Z.
Last Name
Sprecher
Steffel
Stice
Subramaniam
Sun
Tang
Toe
Undercuffler
Venne
Walling
White
Wolete
Yee
Zgonena
Zhu
Company Name
Sunverge Energy
Pepco Holdings, Inc.
Austin Energy
IEEE-SA
PG&E
ABB
Georgia Power Company
Outback Power
Hydro-Quebec Distribution
Walling Energy Systems Consulting, LLC
Power-One/ABB
Pepco Holdings Inc.
Trimark Associates
UL LLC
TUV Rheinland
Minutes—P1547 Meeting, Las Vegas, April 23–25, 2014
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