Distribution Self-Healing Grid
Tested, Validated & Documented Architecture (TVDA)
Overview
Tested Validated Documented Architecture (TVDA) solutions is a unique approach from Schneider Electric to provide
customers with a solution which is pre tested and ready to be implemented in customer’s environment. These solutions
reduces customer efforts for engineering, implementation time.
Under Ground Distribution Network Self-Healing Grid : UG-SHG is a part of underground distribution network which
re-configure itself without any need of human action to restore Power Supply to various parts of the network in case of a
fault.
The System automatically cut-off the faulty section and restore the supply to rest of network by alternate path / sources.
Today’s Utility Challenges
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Continuity of service and security of supply (SAISI index)
Safety of people and assets
Power quality
Limited Man Power for Network Management
Technical Challenges:
 High Installation and commissioning time
 No clarity on the performance and limitations of the system.
 Complex installation and Commissioning. Documents are not available for systems with components from different
vendors.
Solution to Above
Under Ground Distribution Network Self-Healing Grid TVDA Solution
 Pre-Tested and validated
 Well Engineered
 Easy to Implement with Minimum time and Hardware
 Well Documented
Principle and Working: The principle of the Self Healing Grid (SHG) automation system is to start an automatic
sequence of re-energizing the healthy part of a MV ring after a short circuit or earth fault somewhere in the ring. The
re-energizing operations have to be performed in a minimum time (<20 seconds) with a maximum of safety and security.
The System is applicable to a network in Open Ring Architecture with one NOP. The System can be supplied from two or
more sources from same or different substations. The SHG Solution can be implemented together with SCADA System or
as a Stand Alone application.
It required Automation of RMU’s in the Network to be Motorised and Installed with T200 (FRTU-Automation Unit), FPI’s
and VPIS& VDS (Voltage detection System) and Peer to Peer Communication between FRTU’s using various communication media like GPRS.
Easergy T200 I
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Flair 200C (F200C)
Customer Service Tel: 0124 4222040
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Distribution Self-Healing Grid
Tested, Validated & Documented Architecture (TVDA)
Main Characteristics
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Applications
Time to Restore Healthy Part of Feeder: 20-30 Seconds
Large no of Nodes in system (Up to 30) and 3 feeding Points
Simultaneous Communication with SCADA / DMS System
No Complex Engineering required: Pre tested and validated Solution
Adoptable to existing network Components Like RMU’s with
Minimum modifications.
 MV Underground Distribution Network
Loop Automation for Over-Head Distribution Network SHG
Over-head distribution network loop automation is a self healing grid solution for a part of distribution network which
re-configure itself without any need of human action to restore Power Supply to various parts of the network in case of a
fault.
The System automatically cut-off the faulty section and restore the supply to rest of network by alternate path / sources.
The System use concept of Fault Location, Isolation and Service Restoration (FLISR) & Fault Detection, Isolation and
Restoration (FDIR).
ACR communication for
SHG and Load data
< Please add Pic of U-Series circuit breaker and ADVC Ultra Flex Controller from Overhead Distribution Switchgear ADVC Controller Range pages>
Main Characteristics
Applications
Less Time to Restore Healthy Part of Feeder
Simultaneous Communication with SCADA / DMS System
Peer to Peer Communication for Operation and Safety
No Complex Engineering required: Pre tested and validated Solution
Adoptable to existing network Components like recloser or
sectionaliser installations
 Two Options: Classic Loop Automation and Intelligent Loop
Automation
 Over Load Protection during network reconfiguration
 Over Head Distribution Network
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Customer Service Tel: 0124 4222040