SmartZone
Intelligent Automation for Distribution Networks
SUBSTATION A
The availability of power is vital for most consumers. Supply interruption
can impact severely on business processes, infrastructure and lifestyles.
Utilities are at risk of lost revenues and penalties for supply interruptions
as governed by regulatory controls.
138/12 KV
33.6MVA
CB
CG SmartZone is an intelligent, adaptive solution that continuously
monitors load levels and automatically isolates faulted zones and restores healthy zones from alternative sources to minimize load loss and
consumer downtime. SmartZone can be retrofitted and scaled from a
single substation to entire distribution networks, including integration with
Distribution Management Systems.
33.6MVA
CB
CB
CB
CB
ZONE 5
CG Automation has the technology, capability and tools to design, build
and test SmartZone and other Distribution Automation applications which
can be optimized through integration with existing assets and third party
technology as required.
ZONE 1
(NC)
ZONE 6
(NO)
SmartZone Features
•
•
•
•
•
•
•
•
(NO)
(NC)
(NC)
Scaleable, centralized or substation based
Continuous monitoring of feeder loading
Fault Isolation and restoration
Cascaded fault recovery
Inter-substation restoration and load sharing
Centralized configuration and management
User defined priorities and safety actions
Comprehensive design tools
ZONE 2
ZONE 7
(NO)
SUBSTATION B
(NC)
ZONE 3
(NC)
138/12 KV
(NO)
CB
22.4MVA
Description
While it is possible to implement restoration
schemes with stand-alone reclosers in radial
networks, the automation of more complex
networks with multiple sources, including
storage and renewable energy sources,
requires more intelligence.
(NC)
(NO)
ZONE 4
ZONE 8
(NO)
(NO)
CB
Modern utility networks comprise a complex
configuration of feeders, spurs and interconnection points. To optimize these networks it
is important that accurate real-time information is available from all controllable points on
the network.
(NO)
NORMAL ZONE
RECOVERED ZONE
FAULTED ZONE
SmartZone monitors switch status, fault indications and pre-fault loads to
determine the fault location. The faulted zone is automatically isolated and
power is restored to healthy zones and sections from alternative sources.
SmartZone can be created by fitting CG Automation intelligence at each
controllable node or by integrating with existing telemetry.
SmartZone can communicate with each of the switching points and
monitored nodes over available or other preferred communications
media. A combination of media may be required depending on site
conditions, existing services and preferences. CG Automation solutions
include consultation and trials of communications media.
Adaptive Recovery
of Two Combined Zones
CB
#
3
SW
1
ZONE 1
ZONE 2
SW
#
3
SW
3
ZONE 3
ZONE 4
8. Recovery is Complete:
Monitor at SW13 and SW2
for over current alarm.
Modify Z6 & F3 load status.
ZONE 5
4. Open SW 11 isolating
Z6 from Z7 & 8
SW
14
ZONE 6
SW
11
CB #4
1. Fault in Zone 5 (Z5),
Breaker 4 locks-out
SW
12
SW
13
CB
Substation Feeder Circuit Breaker
SW
Monitored Feeder Switch
SW
Alternate Source Monitored Switch
SW
Alternate Source Non Monitored Switch
Through the use of innovative tools, SmartZone is configured to maintain
an overview of the distribution network and connectivity. Based on a
near real-time network status of pre-event loads at each switching point,
the SmartZone algorithm determines the faulted zone and opens the
switches at either side to isolate the fault. It will then attempt to restore
power to un-faulted zones based on available alternative sources and
configured priorities.
The operation of Distribution Automation systems is contingent upon system configuration and network topology. SmartZone provides intelligent
tools to define the network topology. These graphic-based tools support
user connectivity rules, which allow the user to define the network in a
familiar graphical manner which is then stored in a database. The tools
auto-generate the system parameters and algorithm rules to ensure
overall system integrity and security. Subsequent changes to the system
can be performed graphically without re-engineering the entire system
or compromising existing operation. This significantly reduces the design
and engineering time and ensures system integrity and security.
As network topology and operating procedures can vary, SmartZone
allows for customization of zone configuration, topology rules, routing
conditions, auto-restoration or advisory modes and safety considerations.
This configuration forms the basis of the restoration sequences.
SmartZone provides comprehensive safety and operational checks before
executing switching commands or reconfiguring the network. The primary
focus is on personnel safety, operating rules and operational safety of the
network.
After reconfiguring the network, SmartZone adjusts to the new layout
and uses it as a baseline for further fault isolation. SmartZone automatically deals with multiple cascaded fault conditions by understanding the
network interconnections.
SmartZone provides a local and/or remote real time view of the distribution network. Operators have the ability to interrupt or manage the
function of the algorithm in real time by changing the status of switching nodes, e.g. to ‘by-passed for maintenance’, disable the algorithm
completely, for individual nodes or ‘reset’ the network to pre-fault configurations. The current status of all nodes and equipment is displayed
graphically on the network diagram. SmartZone maintains a Sequence of
Events for post-event audits of network switching activity.
5. Recover Z6:
Close Non Monitored first
priority source (SW12)
7. Recover Zone 7 & 8:
If first priority source (SW2) can
carry the pre-fault Z7 & 8. Load
then close SW2 and confirm.
ZONE 7
ZONE 8
L
3. Open SW14
to isolate Z5
SW
6
SW
7
SW
8
SW
2
2. Program
determines
fault in Z5
SW
5
SW
9
SW
10
6. No Voltage detected in Z6 (not recovered).
If second priority source (SW13) can carry
the pre-fault load then open SW12 & Close
SW13. Detect Voltage.
SmartZone can be implemented in a distributed manner by configuring it
for a single substation and associated feeders and sources. This allows for
an efficient and phased implementation and accommodates local restoration philosophy if desired. SmartZone can also be implemented in a centralized manner to automate large networks or areas from a central system.
The same software algorithms are applicable to both architectures.
Contact
CG Automation Systems Ireland Herbert House,
Harmony Row,
Dublin 2
Ireland
T: +353 1 415 3700 F: +353 1 6787913
CG Automation Systems UK Limited
Unit F Network Centre,
Jarrow,
Tyne & Wear,
NE31 1SF
United Kingdom
T: +44 (0) 191 425 5200 F: +44 (0) 191 425 5202
E: sales.as.uk@cgglobal.com
CG Automation Systems USA Inc 60 Fadern Road
Springfield
NJ 07081
USA
T: +1 973 379 7400 F: +1 973 379 2138
E: asolus.sales@cgglobal.com
www.cgglobal.com