Automated Low Voltage Intelligent Networks
Transcript of Automated Low Voltage Intelligent Networks
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Automated Low Voltage
Intelligent Networks
Chris Lowsley
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About EA Technology
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Our heritage
1966
•Electricity
Council
Research
Centre
1990
•Electricity
privatisation
•Transition to
commercial
provider of
technology
services
1994
•Reformed as EA
Technology
2004
•Employee-owned
2016
•200 employees
•c£18m (c€24m)
turnover
Delivering innovation for years
Design and
build
Instruments
Consulting
Services
Technical Site
Services
Training &
Power Skills
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Our Products
Medium and High Voltage Electrical Partial Discharge Solutions
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Detection
Location
Monitoring
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Our Products
Intelligent fault location and restoration solutions for Low Voltage
networks
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Our Technical Services
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A range of services to help our clients understand the condition of their substations, cables, transformers and overhead lines
Oil diagnosticsTransformer condition
assessment
Switchgear condition
assessmentSubstation earthing
Cable condition
assessmentOverhead line services Failure investigations
Lightning protection
and location
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Our Consultancy and Software
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Activity that helps inform strategic choices, driving cost-efficiencies
for those who own and operate energy networks
..and how to extend, manage and integrate solutions into the electrical system
A focus on the electrical assets from the component through to investment planning..
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A company with a global reach
Regional offices: USA, UAE, SEA, China, Australia
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LV Solutions Business
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LV Solutions
Cable Sniffer 2
ALVIN Reclose
Key Focus:
⚫ automated self healing LV distribution networks
⚫maximising network uptime
⚫minimising downtime
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ALVIN Reclose Equipment
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Intro Video
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Background
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Early Prototype
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Replacement for an LV Fuse
Can be directly
inserted into fuse
way
92/83*mm
Back Up
Fuse
Protected
Able to Trip & Close
Automatically
Transient
FaultsOverloads
Reduces
SAIDI’s & SAIFI’s for
Intermittent Faults
<3mins
Able to give fault
information
Pre-fault
detection
Impedance
to fault
* Next batch of equipment
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Other Fuse Replacements
* UK Experience
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ALVIN Reclose is not a…
Fault Conditioning Tool
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ALVIN Reclose is not a…
Or is it??It has a limited conditioning capability up to 2000A
during the SafeOn process
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So what is ALVIN Reclose?
1. ALVIN is a cost effective replacement for a fuse that will try to safely restore customer supplies in less than 3 mins
2. It should be installed after 1st fuse operation in case of a transient fault or overload
3. It is a capital investment to be left on the network indefinitely or until the circuit is proved to be healthy
4. If one ALVIN Reclose unit prevents 75 customers being off supply for more than 1 hour, it will have paid for itself*
* UK Experience
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Basic Design
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Operating Principles
ALVIN Reclose has an Innovative Design
• Thyristor takes all the duty of making and breaking
• Contactor provides low losses when switched
• Thyristor operates at current zero crossing on the sine wave
• Thyristor provides arc free switching
Feeder Cable
BS88Fuse
11kV/415VContactor
Thyristor
Current Zero
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SafeON
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SafeONTM
Making
Fault detection and current limiting technology
Inrush Current Limits (configurable)
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Why it Helps Us....
SafeONTM
Making
Fault detection and current limiting technology
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Arc Free Switching
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Arc-free switching
SafeONTM
Principles
Close Operation
Cable
ALVIN Reclose device is open, no conduction.
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Arc-free switching
SafeONTM
Principles
Close Operation
Cable
ALVIN Reclose device intends to close. SafeONTM controls current via thyristor
IT
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Arc-free switching
SafeONTM
Principles
Close Operation
Cable
No fault found, contactor is closed while thyristor is conducting
IT
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Arc-free switching
SafeONTM
Principles
Close Operation
Cable
Once switch is closed, thyristor switches off, current flows through switch
I
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Arc-free switching
SafeONTM
Principles
Open Operation
Cable
Current flowing through switch under normal conditions
I
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Arc-free switching
SafeONTM
Principles
Open Operation
Cable
ALVIN Reclose device intends to open so thyristor switched on
IT
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Arc-free switching
SafeONTM
Principles
Open Operation
Cable
Contactor is opened while thyristor is conducting
IT
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Arc-free switching
SafeONTM
Principles
Open Operation
Cable
Thyristor switches off at zero crossing; ALVIN Reclose device is open, no conduction.
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Benefits of Arc-Free Switching
1. Multi-shot Capability (1000 ops)
2. No closing onto a permanent fault
3. No Arcing during switching = Safer
4. No Arcing = No contact wear
5. No contact wear = No Maintenance
6. No Maintenance = No return to Supplier
7. No Return to supplier = Less Cost
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Protection Characteristics
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ALVIN Acting as a Fuse
BS88 Fuse Curve:
⚫Batches of fuses have
tolerance band
⚫ALVIN is programmed to
beat fastest part of
tolerance band
⚫ALVIN has an
accumulator to mimic
heating of fuse
Fastest Tolerance
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Fuse Settings
Settings:
⚫315A
⚫400A
⚫ * Single Trip Mode for
➢ Live Working
➢ Single shot
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Benefits of ALVIN Protection
Settings:
⚫ Programable protection settings
⚫Can model any LV fuse characteristic
⚫Can provide hybrid models
Fuse curve with instantaneous trip
⚫Number of reclose attempts can be changed
before lockout
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ALVIN Reclose Ratings
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Typical Installations
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Installations
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Installations
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Stand Alone Mode
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How to use ALVIN Reclose
Stand Alone Mode – Transient Fault or Overload
Successful Reclose(Set at 3 attempts)
Leave ALVIN in Situ until Permanent Fault Identified
ProtectMonitor
&Record
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How to use ALVIN Reclose
Stand Alone Mode – Permanent Fault
Replace Fuse
Will not Reclose due to Permanent fault(set at 3 attempts)
Locate Fault – TDR & SnifferRepair Fault
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ALVIN Reclose with Communications
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Advanced Mini Portal 2 (AMP2)
AMP2
⚫GSM Comms
⚫WiFi Linked
⚫24V Power Supply
Wireless Link
⚫ Links ALVIN to AMP2
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Advanced Mini Portal 2 (AMP2)
•Provides conduit between
connected equipment and
Cloud Database
•Sim card inserted into AMP2
•Wirelessly linked to ALVIN
Reclosers
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How does it link together?
LVCloudTrial
Server
Fitted in Substation
ALVIN Reclose
Wireless Link
ALVIN Mini Portal
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Cloud Server
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LVCloud Server
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LVCloud Server – ALVIN Reclose
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LVCloud Server – ALVIN Reclose
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LVCloud Waveform Capture (pre-fault)
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LVCloud Waveform Capture (pre-fault)
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LVCloud Server - TDR
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LVCloud - TDR
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LVCloud TDR Waveform Capture
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LVCloud TDR Waveform Capture
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Health and Safety
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Health & Safety
Installation/Removal of ALVIN Reclose
Distribution Safety Rules to be adhered to
Wear the Correct PPE
The ALVIN Reclose unit must be withdrawn from fuse
way to establish a Point of Isolation
Health & Safety
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Other Equipment in ALVIN Range
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⚫ Self contained fully automated LinkBox switching
device
⚫ Low Cost Solution (OPEX and CAPEX)
⚫ Automated operation depending on network
conditions
ALVIN LinkSense
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Link Box Automation
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Link Box automation
The following applications may be done by remote control from the control centre or automatically by LinkSensedevice
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LinkSense ICT
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LinkSense BAL
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Fully Automated LV network
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SMART Grid Video
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Low Voltage Network
Network, equipment,
Substation LV Reclosers
Interconnected Network with Link Boxes
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Low Voltage Network
Network, equipment, external comms
Substation LV Reclosers
Comm’s
Comm’s
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Low Voltage Network
Network, equipment, external comms
Comm’s
Link Box controller
Link Box controller
Link Box controller
Comm’s
Substation LV Reclosers
Link Box Equipment
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Low Voltage Network
Network, equipment, external comms, internal comms
Comm’s
Link Box controller
Link Box controller
Link Box controller
Comm’s
PLCComms
Substation LV Reclosers
Link Box Equipment
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Automated Low Voltage Network
Network, equipment, external comms internal comms, control+automation
ETI
Comm’s
PowerOn Fusion, Web Interface, Mobile Phone
Link Box controller
Link Box controller
ETI
Link Box controller
Comm’s
PLCComms
EthernetGSMDNP3SCADA
Substation LV Reclosers
Link Box Equipment