IEEE Power & Energy Magazine - May/June 2014 - 40

Microcontrollers
Meters

Actuators

figure 3. The operation network (courtesy of Wen et al.).

Transmission
Facilities
Microcontrollers
Meters

Actuators
Sensors

Sensors

Actuators

Sensors

Local Communication Network
(LAN)

Load
Metering
DER
Aggregator
Physical Security
Protector
High-Speed
Network
Generation
Controller
Renewable
Regulator

Local Communication Network
(LAN)

Local
Database
Station Central
Controller
Ancillary
Services

Gateway
Protocol
Translator

Physical Security
Protector

Substation
Central Controller
Ancillary
Services

Substations

Protocol
Translator

Gateway

Protocol
Translator
Business
Network
Gateway

Generation Stations

IP-Based Wide-Area Monitoring and Control Network (WAMCN)

CC 4
CC 3
CC 1

CC 2

ieee power & energy magazine

Remote Terminal

Gateway

Local
Database

Consumer
Network
Gateway
Database
Manager
Monitoring
and Control
Database
Control Centers (CC)
40

assets actually include transmission towers (called electricity
pylons in the United Kingdom)
and underground cables, from the
viewpoint of communication, the
tF component merely consists of
some remote control terminals
and a huge number of sensors and
actuators located across a wide
area. these terminals, sensors,
and actuators are connected via
a wide-area, high-speed network.
Usually, data gathered by the tF
component are concentrated by
remote control terminals to avoid
network congestion before being
sent into the WaMcn and delivered as needed. Sometimes, it is
also desirable to have the remote
control terminals encrypt the
tF data to ensure security. as a
result, it is challenging to design
the concentration and encryption
algorithms for the tF component
such that satisfactory services
can be provided without creating
too much computation overhead.
Moreover, designing the highspeed network for the tF component is another problem.
last but not least, the WaMcn
is the backbone of the operation
network and is used to transfer
huge volumes of data among the
gS, tF, SS, and cc components.
In designing the WaMcn, the following requirements must be met:
✔ High availability: Since
the unavailability of the
WaMcn means the loss of
most communication services, it is crucial that backup
schemes for this network be
properly provisioned.
✔ High security: although
gateways such as the cng
and Bng are installed in
the operation network, the
routers and switches inside
the WaMcn still need to be
able to resist insider attacks.
✔ QoS: Since different types
of data are needed by different parties and different
applications, the WaMcn
may/june 2014



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

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