Iec ts 62746 3 2015

4.2 Actors, role a d relations ips The purp se of this s bclau e is to provide an arc itecture overview f om the p rsp ctive of the identification of tec nical roles an as ociated commu

THIS PUBLICATION IS COPYRIGHT PROTECTED

Copyr ight © 2 15 IEC, Ge e a, Switzer la d

Al rig ts r es r ve Unle s oth rwis s e ifi d, n p rt of this p blc tio ma b r epr od c d or uti z d in a y form

or b a y me n , ele tr onic or me h nic l in lu in p oto o yin a d microfim, with ut p rmis io in wr itin from

eith r IEC or IEC's memb r Natio al Commite in th c u tr y of th re u ste If y u h v a y q e tio s a o t IEC

c p r i ht or h v a e q ir y a o t o tainin a ditio al ri hts to this p blc tio , ple s c nta t th a dr es b low or

y ur lo al IEC memb r Natio al Commite for ur th r informatio

Th Intern tio al Ele trote h ic l Commis io (IEC) is th le din glo al org niz tio th t pr ep res a d p bls e

Internatio al Sta d r ds for al ele tri al ele tr onic a d relate te h olo ie

Abo t IEC p blc tio s

Th te h ic l c nte t of IEC p blc tio s is k pt u d r c n ta t r eview b th IEC Ple s ma e s re th t y u h v th

late t e itio ,a c rr ig n a or a ame dme t mig t h v b e p bls e

IEC Cat alo ue - webst ore.e ch/ cat alo ue

Th st an -alo e a plc t io for c n ultin th e tire

biblo ra hic l informat io o IEC Intern tio al Sta d rd ,

Te h ic l Sp cific tio s, Te h ic l R ep rts a d oth r

d c me ts A v aia le for P , Ma OS, A ndroid Ta let s a d

iPa

IEC p blc t i ns s arch - www ie ch/ se rch u

Th a v an e s arc e a le t o fin IEC p blc t io s b a

variety of crit eria (efere c n mb r, t ext, t ec nic l

c mmitt e,…) It als gives informatio o projec t s, re la e

a d wit hdrawn p blc tio s

IEC Just P blshed - webst ore.e ch/ just pu lshed

St ay u to d te o al n w IEC p blc tio s Ju t Pu ls e

d t ais al n w p blc t io s rele s d A v aia le o ln a d

als o c a mo t h b emai

Ele t ro edia - www ele t ro edia.org

Th world's le din o ln dic t io ary of elec t ro ic a d

ele t ric l t erms c ntainin more t ha 3 0 0 terms a d

d finitio s in En ls a d Fre c , wit h e uiv ale t t erms in 15

a ditio al la g a e Als k nown a t he Int ern t io al

Elec t rot ec nic l Vo a ulary (IEV ) o ln

IEC Glos ar y - st d.e ch/ glos ary

More t ha 6 0 0 ele t rot ec nic l termin lo y e t rie in

En ls a d Fre c e tra t ed fom t he Terms a d Definitio s

cla s of IEC p blc t io s is u d sin e 2 0 Some e t rie

h v e b e c le t ed fom e rler p blc tio s of IEC TC 3 ,

7 ,8 a d CISPR

IEC Cust omer Servic Cent re - webst ore.ec ch/ csc

If y ou wis to giv e u your fe d a k o t his p blc tio or

n e furt her a sista c , ple s c nta t t he Cu tomer Serv ic

Ce t re:c c@ie c

FOREWORD 4

INTRODUCTION 6

1 Sco e 7

2 Normative ref eren es 7

3 Terms, def i ition an a breviation 7

3.1 Terms an def i ition 7

3 2 Ab reviation 1

0 4 Arc itectural overview 10 4.1 Ap l cation are 10 4.2 Actors, roles an relation hips 1

4 3 Con e ts 1

3 4.4 Comp nents/Entities 15 5 Mes age tran p rt an services 2

5.1 Tran p rt req irements 2

5 2 Sup ortin mes agin stan ard 21

5.3 Mes age p ylo d 21

5.4 Mes age con tru tion 2

5.5 Mes agin p t ern 2

5.5.1 General 2

5.5.2 Tran actional req estre ly mes age p t ern 2

5.5.3 Query req estre ly mes ages 2

5.5.4 Event Mes ages 2

5.5.5 Presen e 2

5.6 Publ s /s bs rib mes agin 2

6 Sec rity 2

7 Scala i ty an avaia i ty 2

An ex A (informative) Req irements 31

A.1 General 31

A.2 Prin iples 31

A.3 Ad itional commu ication-specific fu ctional req irements 31

A.4 Non-f un tional req irements 3

An ex B (informative) Mes age p ylo d profi es 3

Biblogra h 3

Fig re 1 – Relation hip of IEC 6 7 6 to other stan ard 6

Fig re 2 – Resource-level view 1

Fig re 3 – Hig -level example of actors, roles an relation hips 12

Fig re 4 – Example Commu ication Domain hierarc y 14

Fig re 5 – Exp n ed commu ication domain example in lu in o eration 15

Fig re 6 – Commu ication domain 16

Fig re 7 – Example re l zation of VTNs an VENs in multiple commu ication domain 17

Fig re 8 – Example for multiple commu ication domain 18

Fig re 9 – Tec nical sp ce of a sin le commu ication domain in IEC 6 7 6 18

Fig re 1 – CEM an resource relation hips 2

Fig re 12 – Example p ylo d 2

Fig re 13 – Tran actional req est re ly initiated by VTN 2

Fig re 14 – Tran action req est re ly initiated by VEN 2

Fig re 15 – Query req est initiated by VTN 2

Fig re 16 – Query req est initiated by VEN 2

Fig re 17 – Example of VTN initiated events 2

Fig re 18 – VEN initiated events 2

Fig re 19 – Example of publ s /s bs rib nodes 2

Fig re 2 – Sec rity overview 2

Fig re 21 – Config ration f or s ala i ty an avai a i ty 3

Fig re B.1 – Prof ile stru ture 3

INTERNATIONAL ELECTROTECHNICAL COMMISSION

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio for sta d rdiz tio c mprisin

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q e tio s c n ernin sta d rdiz tio in th ele tric l a d ele tro ic field To

this e d a d in a ditio to oth r a tivitie , IEC p bls e Intern tio al Sta d rd , Te h ic l Sp cif i atio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cif i atio s (P S) a d Guid s (h re fter refer e to a “IEC

Pu lc tio (s)”) Th ir pre aratio is e tru te to te h ic l c mmite s; a y IEC Natio al Commite intere te

in th s bje t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n n

-g v rnme tal org niz tio s laisin with th IEC als p rticip te in this pre aratio IEC c la orate clo ely

with th Intern tio al Org niz tio f or Sta d rdiz tio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org niz tio s

2) Th f ormal d cisio s or a re me ts of IEC o te h ic l maters e pre s, a n arly a p s ible, a intern tio al

c n e s s of o inio o th rele a t s bje ts sin e e c te h ic l c mmite h s re re e tatio fom al

intere te IEC Natio al Commite s

3) IEC Pu lc tio s h v th form of re omme d tio s f or intern tio al u e a d are a c pte b IEC Natio al

Commite s in th t s n e Whie al re s n ble ef forts are ma e to e s re th t th te h ic l c nte t of IEC

Pu lc tio s is a c rate, IEC c n ot b h ld re p n ible for th wa in whic th y are u e or for a y

misinterpretatio b a y e d u er

4) In ord r to promote intern tio al u iformity, IEC Natio al Commite s u d rta e to a ply IEC Pu lc tio s

tra s are tly to th ma imum e te t p s ible in th ir n tio al a d re io al p blc tio s An div rg n e

b twe n a y IEC Pu lc tio a d th c re p n in n tio al or re io al p blc tio s al b cle rly in ic te in

th later

5) IEC its lf d e n t pro id a y ate tatio of c nf ormity In e e d nt c rtif i atio b die pro id c nformity

a s s me t s rvic s a d, in s me are s, a c s to IEC mark of c nformity IEC is n t re p n ible f or a y

s rvic s c rie o t b in e e d nt c rtif i atio b die

6) Al u ers s o lde s re th t th y h v th late t e itio of this p blc tio

7) No la i ty s al ata h to IEC or its dire tors, emplo e s, s rv nts or a e ts in lu in in ivid al e p rts a d

memb rs of its te h ic l c mmite s a d IEC Natio al Commite s f or a y p rs n l injury, pro erty d ma e or

oth r d ma e of a y n ture wh ts e er, wh th r dire t or in ire t, or for c sts (in lu in le al f ee ) a d

e p n e arisin o t of th p blc tio , u e of, or rela c u o , this IEC Pu lc tio or a y oth r IEC

Pu lc tio s

8) Ate tio is drawn to th Normativ refere c s cite in this p blc tio Us of th refere c d p blc tio s is

in is e s ble f or th c r e t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t s me of th eleme ts of this IEC Pu lc tio ma b th s bje t of

p te t rig ts IEC s al n t b h ld re p n ible for id ntifyin a y or al s c p te t rig ts

The main tas of IEC tec nical commite s is to pre are International Stan ard In

ex e tional circ mstan es, a tec nical commit e may pro ose the publ cation of a tec nical

sp cification when

• the req ired s p ort can ot b o tained for the publ cation of an International Stan ard,

despite re e ted ef forts, or

• the s bject is sti u der tec nical develo ment or where, for any other re son, there is the

f uture but no immediate p s ibi ty of an agre ment on an International Stan ard

Tec nical sp cif i ation are s bject to review within thre ye rs of publ cation to decide

whether they can b tran formed into International Stan ard

IEC TS 6 7 6-3, whic is a tec nical sp cification, has b en pre ared by IEC tec nical

commit e 5 : Power s stems management an as ociated information ex han e

The text of this tec nical sp cification is b sed on the fol owin doc ments:

En uiry draft Re ort o v tin

Ful information on the votin f or the a proval of this tec nical sp cification can b fou d in

the re ort on votin in icated in the a ove ta le

This publ cation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

A l st of al p rts in the IEC 6 7 6 series, publ s ed u der the general title Syst ems intera e

b twee c stomer en rg ma a eme t system a d the p wer ma a eme t syst em, can b

f ou d on the IEC we site

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date in icated on the IEC we site u der "htp:/we store.iec.c " in the data

related to the sp cific publ cation At this date, the publ cation wi b

• tran f ormed into an International stan ard,

• recon rmed,

• with rawn,

• re laced by a revised edition, or

A bi n ual version of this publcation may b is ued at a later date

IMPORTANT – The 'colour inside' logo on th cov r pa e of this publ c tion indic te

that it contains colours whic are considere to be us f ul for the cor e t

und rsta din of its conte ts Us rs s ould th ref ore print this doc me t using a

colour printer

The purp se of this p rt of IEC 6 7 6 is to define an arc itecture for IEC 6 7 6 series of

stan ard that can b leveraged for the management of c stomer energ resources an DER

These resources may b a combination of lo d, generation an storage resources that can b

managed to resp n to sig als provided by grid an /or market o erators These resources

may b identified an managed as in ivid al resources with sp cif i ca a i ties, or as virtual

resources with an ag regated set of ca a i ties

The f oc s of this arc itecture is to leverage the Internet for commu ication b twe n grid

o erators, market o erators, distribution s stem o erators, electricity s p lers, ag regators,

service providers an energ resources

This Tec nical Sp cification leverages existin IEC stan ard The data model of IEC 6 7 6 is

b sed on the Common Information Model an IEC 618 0 IEC 6 7 6 is tran p

rt-in e en ent

Fig re 1 s ows the relation hip of IEC 6 7 6 to other IEC an ISO stan ard

Figure 1 – Relations ip of IEC 6 7 6 to oth r sta dards

IE C

SYSTEMS INTERFACE BETWEEN CUSTOMER ENERGY

Part 3: A rchitecture

This p rt of IEC 6 7 6, whic is a Tec nical Sp cif i ation, esta ls es an arc itecture that is

s p ortive of interaces b twe n the Cu tomer Energ Management Sy tem an the Power

Management Sy tem

A DER Management Sy tem can also b a Cu tomer Energ Management Sy tem

The f ol owin doc ments, in whole or in p rt, are normatively referen ed in this doc ment an

are in isp n a le f or its a pl cation For dated ref eren es, only the edition cited a ples For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

amen ments) a pl es

IEC 619 8-9:2 13, Ap l i at ion inte ration at ele tric util it ies – System int era es for

d istribut io ma a eme t – Part 9: Intera es for met er re ding a d c ntrol

IEC 619 8-10 , Ap l i at ion int egration at ele tric util it ies – System intera es for d istributio

ma a eme t – Part 10 : I mpleme t ation profil s

IEC 6 3 1 (al p rts), Power systems ma a eme t a d as o iated informat io ex ch n e –

Data a d c mmu ic tions se urity

IEC TR 6 7 6-2:2 15, Systems int era e b t wee c stomer e erg ma a eme t syst em a d

th p wer ma a eme t system – P art 2: U se c ses a d re uireme ts

IEC 6 4 3 (al p rts), Ind ustrial c mmunic tio n tworks – Network a d system se urity

3 Terms, def initions and abbreviations

For the purp ses of this doc ment, the f ol owin terms, definition an ab reviation a ply

3.1 Terms a d def initions

3.1.1

a gre ation

col ection of the ca a i ties of multiple resources into a sin le virtual resource

Note 1 to e try: A c mmo u e of a gre atio is to c le t ma y smal re o rc s a d of fer th ir c p bi tie in th

f orm of a sin le larg r re o rc to a mark t

3.1.2

c s a ing

event whic oc urs when a mes age publ s ed in one commu ication domain cau es another

mes age to b publ s ed in one or more other commu ication domain at a dif ferent level of a

hierarc y

3.1.3

communic tion domain

logical as ociation of a VTN with a set of VENs s p orted by an u derlyin commu ication

inf rastru ture

Note 1 to e try: This pro id s f or a th ntic tio of VENs a d s c re c mmu ic tio s rvic s Sin e VTN a d

VEN are role within a Commu ic tio Domain, it is p s ible f or a a tor to ta e a VTN role in o e Commu ic tio

Domain a d p te tialy o e or moreVEN role in oth r Commu ic tio Domain

Note 2 to e try: This term is d fin d b this te h ic l s e ific tio

3.1.4

c stomer e ergy ma a er

CEM

central managin fu ction u ed by the c stomer to manage the f low of inf ormation b twe n

the grid an con ected smart devices at the c stomer premises

Note 1 to e try: This is d f i e in more d tai in IEC TR 6 7 6-2

3.1.5

dema d re pons

DR

in entivizin of c stomers by costs, ecological inf ormation or others in order to initiate a

c an e in their con umption or fe d-in p tern ( b t om-up a pro c ” = Cu tomer decides,

b sed on EURELECTRIC Views on Deman -Side Particip tion [1])

Note 1 to e try: Altern tiv d f i itio : In IEC 6 0 0-617:2 0 , 617-0 - 5 it is d fin d a : a tio re ultin f rom

ma a eme t of th ele tricity d ma d in re p n e to s p ly c n itio s

3.1.6

distribute e ergy re ourc

sp cial zed energ resource with a flexible lo d an /or s p ly general y at the distribution

level

3.1.7

me s ge

method of con eyin information b twe n p rties in a commu ication network

Note 1 to e try: Th informatio ma refle t a d s riptio of a o je t a d/or d ta relate to th o je t

3.1.8

nod

logical destination ad res for mes ages that are publs ed u in a publ s /s bs rib

commu ication inf astru ture

Note 1 to e try: De e din u o th s e ific c mmu ic tio inf ra tru ture this ma als b c le a ‘to ic’ or

commu ication p tern where a req est mes age is sent f rom one proces to another

proces , where there is that the exp ctation that a resp n e mes age wi b returned by the

receiver of the req est mes age

SEE: IEC 619 8-10

re ourc

provider or con umer of energ

Note 1 to e try: A VEN ma b re p n ible f or ma a in o e or more e erg re o rc s

information ac es p int f rom the grid to the c stomer premises

Note 1 to e try: This is a lo ic lc n e tio p int b t n t th ele tric l c n e tio p int

Note 2 to e try: This is d s rib d in more d tai in IEC TR 6 7 6-2

3.1.14

te h ic l role

role whic identifies resp n ibi ties as ociated with p rticip tion within information

ex han es with other actors

Note 1 to e try: Actors d f i e b u e c s s h v a sig e role with a s ciate re p n ibi tie Te h ic l role

are p y ic ly re lz d thro g s ftware a d a s ciate s stems inte ratio inf ra tru ture This is a term d fin d

h re f or th p rp s s of this Te h ic lSp cif i atio

3.1.15

virtual e d node

tec nical role as umed by an actor where the actor is a con umer an /or prod cer of

mes ages that are def i ed by this Tec nical Sp cification

Note 1 to e try: A Virtu l En No e (VEN) c n b a s ciate with z ro or more re o rc s A VEN c n re eiv

me s g s p s e fom a VTN or s n re u sts or e e ts to a VTN A VEN ma c mmu ic te with multiple VTNs,

wh re e c VTN is p rt of a difere t Commu ic tio Domain

Note 2 to e try: This term is d f i e b this Te h ic l Sp cific tio a a te h ic l role, n tin th t th re is a

s mewh t relate d finitio for a ‘En De ic ’ a d fin d b IEC 619 8-9 Whie th c n e t is g n ric, th

s e ific term is b rowe fom Op nA R 2.0 with th n rmativ d f i itio b in pro id d b this Te h ic l

Sp cific tio

3.1.16

virtual re ourc

set of one or more ph sical resources that is re resented as a sin le, ag regated resource

Note 1 to e try: This ma b c mpris d of multiple e titie th t ma b g o ra hic ly distrib te Virtu l

Re o rc s c n b a a gre ate mo el of ma y ty e of lo d, g n ratio a d stora e, s c a V P, P , fa tory,

b idin , h me, etc Sin e th Virtu l Re o rc c n in lu e b th e erg c n umer a d e erg pro id r, th relate

“n t lo d c rv ” c n b p sitiv (in this c s th Virtu l Re o rc a ts a a c n umer whic c n ume ele tric l

p wer, or n g tiv (in this c s th Virtu l Re o rc a ts a g n ratio a s ts to pro u e ele tric l p wer

3.1.17

virtual to node

tec nical role as umed by an actor that is as umin resp n ibi ty for the co rdination of

VENs within a Commu ication Domain

Note 1 to e try: This is a s e ial c s of a VEN, wh re a Virtu l To No e (VTN) is ef fe tiv ly a p re t of ma y

VENs with th re p n ibi ty for c ordin tio of th s VENs A VTN is re p n ible for p s in to or re eivin

me s g f rom ma y VENs A mark t o erator, grid o erator or a gre ator are e ample of a tors whic wi

ty ic ly impleme t a VTN interf ac

Note 2 to e try: This term is d f i e b this Te h ic l Sp cific tio a a te h ic l role, n tin th t th re is a

relate d finitio pro id d b IEC 619 8-9 Whie th c n e t is g n ric, th s e if i term is b rowe fom

Op nA R 2.0 with th n rmativ d f i itio b in pro id d b this Te h ic l Sp cif i atio

3.1.18

wire protocol

in a network, the mec anism tran mit in data f rom a sen er to a receiver

Note 1 to e try: If th s n er a d re eiv r u e th s me wire proto ol th y are s id to intero erate This d e n t

lteraly me n th t sig als are c n e e o er a metal wire, a th term is als u e in c nju ctio with wirele s a d

DMZ De-Mi tariz d Zo e, a p rimeter n twork u e to s ield a intern l

tru te n twork fom ata k fom e tern l n twork s c a th

IEC Intern tio al Ele trote h ic l Commis io

4 Architectural overview

Fig re 2 s ows a resource-level view of the are to b ad res ed by this Tec nical

Sp cification, where examples of sp cif i actors are provided as related to interaction

b twe n the smart grid an the c stomer premises at what is cal ed the ‘smart grid con ection

p int’ (SG CP)

Figure 2 – Re ourc -le el view

However, the pro lem sp ce is exten ed upward to s p ort co rdination of these resources

by actors re resentin markets, ag regators an o eration In order to s p ort the

co rdination of these actors, there are a variety of information ex han es that are con eyed

u in IEC 6 7 6 More examples are provided by the u e cases of IEC TR 6 7 6-2

4.2 Actors, role a d relations ips

The purp se of this s bclau e is to provide an arc itecture overview f om the p rsp ctive of

the identification of tec nical roles an as ociated commu ication stan ard that can b

a pl ed to a set of actors in s p ort of their respective fu ctional roles an relation hips The

definition of sp cific actors are provided by IEC TR 6 7 6-2 The intent of the arc itecture is

to ena le commu ication (primari y u in publc wide are network , s c as Internet

b twe n a wide variety of actors, in lu in (but not l mited to) uti ties, market o erators,

service providers, ag regators an c stomers for the purp ses of co rdinatin an o eratin

distributed energ resources (DER) an deman resp n e (DR)

IEC TR 6 7 6-2 def i es a large n mb r of actors It can b re di y se n that there are man

simi arities in some of those actors as wel as fu ctional overla in the roles of man of the

actors However, fom the p rsp ctive of def i in a s p ortin arc itecture it is imp rtant to

define tec nical roles an resp n ibi ties that can b taken on by those actors

It is not the intent of this Tec nical Sp cification to provide examples of al actors def i ed by

IEC TR 6 7 6-2 or restate the definition of those actors, an con eq ential y some hig er

level categorization of actors wi b u ed within this Tec nical Sp cif i ation as o p sed to

sp cific actors in des ribin the u e of this Tec nical Sp cification Ad itional y it is the intent

of this arc itecture to s p ort sp cific actors who are yet u k own The b sic req irement is

that an actor can as ume (either directly or by prox ) the tec nical roles of ‘VTN’ an /or ‘VEN’

as def i ed by this arc itecture

IE C

The foc s of this arc itecture is the s p ort of o eration an markets as they interact with

the c stomer at the smart grid con ection p int As an example, within a market for DER/DR,

there are typical y a set of hierarc ical relation hips Examples of these hierarc ical

relation hips f or diff erent categories of actors in lu e:

• Resource Provider to Market Op rators

• Resource Provider to Ag regators/Service Providers

• Ag regators/Service Providers to Market Op rators

At the same time it is imp rtant to recog ize that resources may b group d into virtual

resources, where virtual resources are typical y group d, managed an co rdinated by

ag regators These example relation hips are s own in the example diagram for wholesale

an retai energ markets given in Fig re 3:

Figure 3 – High-le el e ample of a tors, role a d relation hips

IE C

From Fig re 3, it can b se n that the relation hips are typical y (but not alway ) hierarc ical.

Examples of non-hierarc ical relation hips could exist in the case of a resource that may

p rticip te in multiple markets or where some ca a i ties of a resource may b managed by

dif ferent p rties It is also p s ible to have a service provider gather u age information after

the fact for resources that are managed by one or more aggregators It is also p s ible that

an ag regator or virtual resource could p rticip te in b th wholesale an retai markets The

restriction up n this are lef t to the rules imp sed by the market, but are not tec nical

restriction p r se

Also, de en ent on the in ivid al re l zation, the SG CP can b at diff erent location in the

diagram Resources or Virtual Resources cor esp n to to either CEM or CEM Ag regator in

IEC TR 6 7 6-2

However, the key p int of Fig re 3 is to s ow that the relation hips are typical y ‘upstre m’ or

‘down tre m’ There is not an expl cit req irement for direct p er to-p er commu ication

b twe n actors when the actors are at a common level Typical y the fan out is down tre m,

where for example a market o erator wi commu icate with large n mb rs of resources,

service providers or ag regators That is also to say that a resource, service provider or

ag regator wi only interact with a smal n mb r of upstre m entities

It is imp rtant to note that resources may also have IEC 618 0-b sed commu ication f or the

purp se of grid o eration The arc itecture s p orts the commu ication with distribution

management s stems This commu ication inf rastru ture can also b u ed f or grid o eration

an p tential y to tran p rt IEC 618 0 mes ages The u e of IEC 618 0 is otherwise outside

of the s o e of this doc ment

4.3 Conc pts

The purp se of this s bclau e is to introd ce key arc itectural con e ts as ne ded for the

definition of this Tec nical Sp cif i ation in s p ort of the u e cases an req irements These

key arc itectural con e ts in lu e the fol owin :

• Commu ication Domain

It can also b se n that resources may b leveraged in more than one market, provided that

there are controls ( ec nical or contractual) that prohibit a resource f rom u fairly makin

commitments f or the same energ at the same time in more than one market

The hierarc ical relation hips can b re resented as dif ferent commu ication domain

Resources can b registered within a market or virtual zed throu h an ag regator, an

therefore as ociated with a commu ication domain ac ordin ly

The example diagram of Fig re 4 provides a ‘commu ication domain’ p rsp ctive, where

there can b man actors of diff erent typ s within e c commu ication domain Some actors

(most commonly ag regators an service providers) can exist in more than one

commu ication domain

Figure 4 – Ex mple Communic tion Domain hierarc y

Given the hierarc ical relation hips b twe n commu ication domain , there wi typical y b

cas adin of inf ormation f lows f om one commu ication domain to another An example of

this mig t b a price sig al is ued within a wholesale market that cau es a related sig al (e.g

price or control sig al) to b is ued within a retai market, whic may then cau e sp cific

action to b taken by a retai ag regator At the lowest levels c stomer energ managers

would receive IEC 6 7 6 mes ages and decide up n action to b taken local y by smart

devices to a pro riately manage resources

With resp ct to cas adin , information f lows are cas aded b twe n commu ication domain

when:

• An actor is a VEN in one commu ication domain an a VTN in another commu ication

domain, an

• The actor decides that a mes age received in one domain s ould res lt in a mes age

b pro agated to another commu ication domain (it ne d not b identical y the same

mes age)

Another related asp ct is that of ag regation, where a set of resources in a lower level

domain may b projected as a virtual resource in a hig er level domain This is the commonly

the case where an ag regator may manage resources an of fer there ag regate ca a i ties

(either al or in p rt to a retai or wholesale market Ag regation of resources is key to

s ala i ty ena l n multi-level arc itectures Ag regation may oc ur within a CEM or by

actors s c as those for ag regators, service providers, retai markets, retai s p l ers or

distribution s stem o erators

The example s own in Fig re 4 s ows example p th for commercial commu ication , where

there may b other commu ication domain ad ed The market design f or diff erent region

of the world would dictate sp cific desig s for IEC 6 7 6 commu ication domain

Fig re 5 s ows an exp n ed example, where commu ication domain are ad ed for a grid

o erator an retai s p l ers There are ne rly an infinite n mb r of combination p s ible

when sp cif i typ s of actors are as ig ed to diff erent commu ication domain whic are then

hierarc ical y organized as ap ro riate to me t regional ne d

IE C

Figure 5 – Expa de communic tion domain e ample including o eration

In Fig re 5 it can b more re di y se n that actors within one commu ication domain may

p rticip te in other commu ication domain One example of this is where the VTN for a retai

market may b a VEN in b th Wholesale Market an Grid Op ration commu ication

domain

4.4 Compone ts/Entitie

Within a commu ication domain, the commu ication ne d of e c actor are served by either

a VTN or VEN inter ace as re l zed throu h some software comp nent de loyed on a device

or server Fig re 6 des rib s logical commu ication relation hips within a commu ication

Figure 6 – Communic tion domain

As can b se n f om the diagram, VENs commu icate with VTNs an not with e c other as

p ers (if they do so, it is outside the s o e of this tec nical sp cification) The fol owin

commu ication rules a ply within a commu ication domain:

• Al comp nents are not eq al, one of the comp nents within a Commu ication Domain

is clas if ied as a ‘VTN’ (whic is re resentative of the hierarc ical roles an

relation hips within a domain) an al others are clas ified as ‘VENs’

• The VTN wi commu icate with al VENs

• VENs do not have any req irement f or direct interaction b twe n themselves within

DR/DER markets

• VENs within a commu ication domain may b as ig ed roles an have privi eges

As in icated e rl er, sin e it is p s ible for a resource, service provider or aggregator to

p rticip te in multiple markets, it s al b p s ible f or a VEN to commu icate in more than

one commu ication domain (e.g with more than one VTN) This is s own in Fig re 7, where

there are thre VTNs whic e c manage a diff erent commu ication domain

Figure 7 – Ex mple re l zation of VTNs a d VENs in multiple communic tion domains

In this context a VEN may re resent a complete in u trial faci ty or a commercial buidin or

even a sin le lo d In Fig re 8 a practical example is s own Al con umers (in this case

VENs an the VTN for the in u trial f aci ty) are con ected to the grid whic is managed by

one grid o erator But the places where they bu their energy are diff erent The large

con umers bu the electrical energ directly fom the wholesale market where s the smal er

con umers buy f rom an energ service provider

Figure 8 – Ex mple f or multiple communic tion domains

Fig re 9 when re resentin a sin le commu ication domain: