IEEE Power & Energy Magazine - May/June 2014 - 60

Application Layer

Smart Grid
Smart Grid
Enterprise
Smart Grid
Enterprise
Applications
Enterprise
Applications
Applications

Enterprise Bus

ICT Layer

Information Technology Infrastructure

Security Regime

Power System Layer

Communication
Infrastructure
Utility Assets
Generation

Transmission

Distribution

figure 5. A hierarchical smart grid system integration map.

the top of the chain through adopting and integrating new
enterprise bus functions. that approach is understandable
and very much in line with the current constraints on utility assets and organizational structures. in fact, the early
attempts to modernize the system had to take into account
the realities of a highly compartmentalized system and
operational hierarchy tasked with delivering a critical service to customers while meeting the challenges with which
most utilities grapple.
Figure 5 depicts the approach utilities in general have
taken in their integration of smart grid functions. the point
of entry of new functions into the hierarchical structure of
the utility system has been at the interface with customers
(e.g., smart meters), together with the associated support
functions within the enterprise bus, such as meter data management (mdm) systems. Patches of plumbing to connect
the two ends of the function (e,g., the required communication system to support the capture and exchange of data
for the purpose of billing and revenue management) are thus
inserted within the appropriate information and communication technologies (iCt) layer of the system.
the question utilities have not answered here concerns what
other smart grid capability the chosen ami technology can
support. the current integration of ami systems across many

b#3

Public Switch Network

b#

4

D-Sub#1

T-S
u

D-Sub#2
D-Sub#4

M1

HAN#1

M2

HAN#2

M3

HAN#3

Utility Field Network
T-Sub#2

Power
Plant#1

T-S
u

T-Sub#1

b#

3

SG-A
pp#5

SG-App#3

SG-A
pp#4

Utility Core Network

Feeder

D-Su

SG-App#1 SG-App#2

Power
Plant#2

Wide Area Network (WAN)

Local Area
Network (LAN)

Home Area
Network (HAN)

figure 6. Disjointed network domains in a legacy grid.
60

ieee power & energy magazine

may/june 2014



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - May/June 2014

IEEE Power & Energy Magazine - May/June 2014 - Cover1
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