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Smarter Grid Demands Flexible Communications - Electric Light & Power
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10/01/2012
by Walter R. Phillips, GE Energy Management
As the smart grid grows bigger and smarter, electric utilities need flexible solutions to keep pace with its dynamic and
increasingly sophisticated requirements. The efficient capture, communication and processing of meter data is critical to a
smoothly functioning smart grid but involves several related issues: securing, controlling and managing the cost of
transmitting the data and developing the capacity to transmit it throughout a utility network.
Pushing Communications
General Electric Co. (GE) has been collaborating since 2009 with Houston-based CenterPoint Energy to advance energy
purchase, delivery and usage.
CenterPoint's Advanced Metering System (AMS) project required it to meet an ambitious challenge in retrieving and
collecting meter data: CenterPoint had to connect more than 5,500 Itron OpenWay meter data collection devices, or cell
relays, with more than 2.2 million digital smart meters throughout its 5,000-square-mile Houston service territory to serve a
dynamic, competitive marketplace.
CenterPoint needed an equipment and technology provider that could support cybersecurity, open networking standards
and protocols and that could provide high reliability and system availability, bandwidth for network loading and future
network capacity, robust network management tools and processes, and a record of meeting the needs of utility
communications systems. The solution also had to be scalable to support CenterPoint's multiyear build out and be rugged
enough to cope with Houston's heat, humidity and major weather activities.
CenterPoint chose GE's Digital Energy business for its backhaul telecommunications system. GE provided MDS Mercury
3650 WiMax radios for the AMS communications network that links CenterPoint's meter network to the meter collection
devices , along with the engineering, program management and support services that map and execute the WiMax
network.
The telecommunications process for the $530 million project begins with the AMS network's gathering the meter data and
passing it on to the more than 5,500 meter collection devices over a wireless mesh network. Each device then connects to
a WiMax radio, which transmits the meter information to one of 140 MDS Mercury 3650 radio access points. Finally, the
meter data is transferred to CenterPoint's data center via microwave, fiber-optic cable or both for storage and processing.
"We opted for GE's WiMax technology because it has the speed, durability, scalability and reliability we need in a private
communications infrastructure that can support our vast smart grid coverage area," said Kenny Mercado, CenterPoint's
senior vice president of advanced metering deployment.
Consumers can become more energy efficient. Customers have user-friendly access to their 15-minute interval
consumption data, and the utility and consumers have benefited from more than 3 million service orders—move-ins, move-
outs, re-reads, etc.—executed remotely, faster and cheaper. Retail electrical providers can expand service offerings,
including pre-paid service and time-of-use rates, and establish platforms to offer future home appliance monitoring and
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