smart devices - uk power networks...• load blinded doc (alstom micom p142) proved as suitable...
TRANSCRIPT
Smart Devices
Session 3c:
Gilbert Manhangwe | UK Power Networks
2011. UK Power Networks. All rights reserved
FPP
Smart
Devices
Trials
Smart Devices Overview
Release capacity
headroom on
constrained parallel
circuits
Increase utilisation
of existing network
assets
Provide alternative for DOC
protection
Create voltage head/legroom
to accommodate DGs
2
Quadrature-booster Overview
3
2011. UK Power Networks. All rights reserved
Quadrature-booster Overview
Wissington
33kV
Wissington
CHP
Northwold
Swaffham
Grid
G
123
Downham
Market
Southery
Kings Lynn
South Grid /
Waltington
March Grid
via
Littleport
11.07km
8.154km
5.3
6km
8.275km
33kV
11kV6.31km
Walsoken Grid
via
Outwell Moors
50%
100%
Simplified Trial 33kV Network Specialised form of transformer used to
control direction of real power flow in
parallel circuits
Seasonal
Export Limits
50%
4
2011. UK Power Networks. All rights reserved
Quadrature-booster Learning Outcomes
• Quadrature-booster works on distribution networks
Quadrature-booster on line
26/07/13
5
2011. UK Power Networks. All rights reserved
• FATs to depict actual network on which plant is to be used
All tests to be agreed at design review stage
Quadrature-booster Learning Outcomes cont’d
• Now have better understanding of Quadrature-boosters for distribution networks
Refine phase angle to achieve finer step changes
Easier modelling and placing bucking/boosting
• Installation, operation & maintenance are similar to equivalent power transformers
• QBCS logic varies as distribution network configuration evolves
What can we do differently in future?
• Produced protection scheme template for first QB – with support from Mott MacDonald,
and validation using RTDS by Alstom Grid
6
2011. UK Power Networks. All rights reserved
Dynamic Line Rating Overview
• Use DLR to control flexible generation on 33kV networks
• Identify opportunities to optimise DLR settings
• Consider use of a “centralised” DLR system
Four DLR systems installed across FPP trial area
Objectives
Alstom P341
relay
Weather
Station
7
2011. UK Power Networks. All rights reserved
Dynamic Line Rating Learning Outcomes
• Centralised DLR systems are possible (within 21km)
• CIGRE 207 model can be replicated to within ± 2% of DLR Relay output
• 47% additional amapacity uplift compared to summer
static ratings
8MW DG to be controlled against DLR output
Key Weather
Elements
Outcome (Pearson’s coefficient of correlation)
Ambient Temperature Highly correlated (0.99)
Wind velocity 10min rolling averages provide adequate representation
Wind direction Highly variable (0.43)
8
2011. UK Power Networks. All rights reserved
• Create voltage head/legroom by optimising target voltage at 33kV and 11kV
Automatic Voltage Control Overview
9
2011. UK Power Networks. All rights reserved
Automatic Voltage Control Overview
Unmask DG output
in feeder
measurements
Optimise target
voltage using
ANM
Calculate
dynamic (true)
load
Calculate ‘true’
target voltage &
LDC bias
10
• Create voltage head/legroom by optimising target voltage at 33kV and 11kV
Automatic Voltage Control Overview
Unmask DG output
in feeder
measurements
Optimise target
voltage using
ANM
Calculate
dynamic (true)
load
Calculate ‘true’
target voltage &
LDC bias
Remote
measurements
from existing
SCADA
ANM
Calculate basic
target voltage
Calculate dynamic
(true) load ratio
Update target
voltage at
March Grid
33kV network
11kV network Update dynamic
load ratio at
March Primary
33kV & 11kV
Calculation
Algorithms
SuperTAPP n+
11
Automatic Voltage Control Learning Outcomes
• Voltage which would be applied by Standard AVC
significantly less than expected
Improved
Target
Voltage
Improved
Generation & LDC
boost estimations
• A first in updating Load Ratio in SuperTAPP n+ application 12
2011. UK Power Networks. All rights reserved
Novel Protection Relays Overview
Objectives
• Provide alternative to DOC protection – increase reverse power capacity
• Prevent mal-operation of DOC during export conditions
Standard DOC
(control/tripping mode)
DOC with load blinder functions
(monitoring/alarming mode)
Combined DNPS & DVDO system
(monitoring/alarming mode)
4 x P142 feeder
management relays
installed
Operational
Trial
13
2011. UK Power Networks. All rights reserved
Novel Protection Relays Learning Outcome
• Load blinder on/off events due to poor power factor at low loads – additional
tolerance must be added to maximum load angle
±0.85 power factor envelope was considered maximum allowable
• DNPS & DVDO stability was confirmed, and template settings established
• Load blinded DOC (Alstom Micom P142) proved as suitable mechanism for
increasing available export capacity in 132/33kV Grid Transformer
applications
Suitable for sites supplied from a single 132kV node
Further work required for sites supplied from multiple 132kV nodes
14
2011. UK Power Networks. All rights reserved
For more information visit ukpowernetworks.co.uk/innovation
15
Successful deployment of new commercial arrangements and interoperable
smart grid components to deliver faster and cheaper DG connections
Engaged with 50+ DG developers
Interviewed 20
Trialled two DG access principles:
LIFO and Pro–rata capacity quota
Made 40 connection offers:
• 15 accepted, 54.4MW enabled,
£44m savings
Commissioned RF mesh wireless
network for wide area comms
Developed analysis tool for
investment options in DG
dominated networks
Integrated and commissioned smart
devices across 12 sites
Deployed IEC 61850 for
interoperability between solution
components
Installed and commissioned first
quad-booster at 33kV
Key achievements of Flexible Plug and Play