IEEE Power & Energy Magazine - March/April 2018 - 63
The core of this new system management capability
relies on a breakthrough in strategic information management
approach for electrical system data.
real environment and gain experience on the advantages and
drawbacks of this new technology.
at the same time, the development of the standalone
merging unit concept, which enables the digitalization of the
outputs of the existing instrument transformer, was a key
factor introducing the full digitalization in a brownfield substation refurbishment ("brownfield" consists of refurbishing
existing infrastructure, whereas "greenfield" entails building a new substation or infrastructure). as a consequence,
the design reduces the need for bays in the yard. it also
offers the possibility of relocating all the devices at the foot
of the HV primary equipment, providing a better opportunity to include the instrument transformer natively in the
equipment, or locating it at a centralized room because the
fiber-optic cable has no information losses and the auxiliary
power supply can be simplified (Figure 8).
The new transformers and other sensors provide full digitalized access to all the sampled values. a high-speed local
data storage has to be commissioned, and stricter and much
more precise specifications for time and date synchronization are needed. as an example, the Precision Time Protocol, ieee 1588 (included in ieC Pas 61850-9-3: Precision
Time Protocol Profile for Power Utility Automation) as well
as data names and attributes specification (e.g., ieC 61850
edition 2 with a user profile) are required within the substation and between substations.
a smart substation produces a data lake, where new information may be computed at the user's request: simple ones
like phasors or root mean square values, moving average over
any time frame, and more complex functions like fast Fourier transforms and harmonics. eventually, local substation
data consistency, replacement, and even local state estimation
RTE Smart Substation
Primary Equipments
and Sensors
Wide-Area Controller
Protection Relays
Bay Controllers
Merging Units
art
Sm n Area
io
t
sta
Sub
ion
stat
Sub ontrol
C om
Ro
Digital Substation HMI
Ethernet Switches
rd
h Ya
tc
Swi
Monitoring
Optical
CTs/VTs
Switchgear
Control Unit
© Credit GE Grid Solutions and CIGRE
figure 7. A representation of the smart substation Poste Intelligent. (Image courtesy of RTE, used with permission.)
CT: computed tomography; VT: volumetric tomography.
march/april 2018
ieee power & energy magazine
63
Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2018
Contents
IEEE Power & Energy Magazine - March/April 2018 - Cover1
IEEE Power & Energy Magazine - March/April 2018 - Cover2
IEEE Power & Energy Magazine - March/April 2018 - Contents
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IEEE Power & Energy Magazine - March/April 2018 - Cover3
IEEE Power & Energy Magazine - March/April 2018 - Cover4
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