Post on 27-Aug-2018
The Hydro Québec De-icer Project at Lévis Substation
HVDC and FACTS Subcommittee, Calgary, July 29 2009
PresenterChris Horwill : AREVA T&D
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Background
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Why a de-icer?
In December 1998, the Québec region of Canada was hit by one of the worst ice-storms in recorded history
The ice storm generated ice build-up as much as 75mm
An accumulation of ice toppled hydro towers and downed hundreds of kilometres of high-voltage transmission lines.
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De-icer: Location
De-icer atLévis Substation
Québec city
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Lines for de-icing
315 kV183kmRivière du Loup
3078 / 3079
735 kV242kmBergeronnes7007
735 kV78kmAppalaches7097
735 kV62kmJacques Cartier
7010 +7020
735 kV27kmLaurentides7010
VoltageLengthDestinationLine
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De-icer Mode: Main design ratings
Main Ratings:
Standard de-icer mode - “Nameplate rating” :250MW, 7200A / ±17.4kV @ +10°C
Verification mode : 200MW, 5760A / ±17.4kV @ +30°C
1 hour overload :300MW, 7200A / ±20.8kV @ +10°C
Low ambient overload : 275MW, 7920A / ±17.4kV @ - 5°C
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De-icer Mode: Main design ratings
Because of the different characteristics of the sections, the operating range of current and voltage is large
6000 A
DC voltage
DC current600 A 1000 A 7200 A3600 A
2.0 kV
41.6 kVVref = 34.8 kV
Verification
De-icing
Temporary overload
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SVC Mode: Main design ratings
Main ratingsDynamic range
+225 Mvar / -115 Mvar at nominal voltage
Target voltage315 kV ± 5%
Slope
3% on 225 Mvar
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Solution
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One line diagram
TSC154Mvar
5/11 and 7/13filters 70Mvar
HP filter55Mvar
HP filter55/12Mvar
DC filters315kV
43kV
20kV
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One line diagram: De-icer mode
TSC154Mvar
5/11 and 7/13filters 70Mvar
HP filter55Mvar
HP filter55/12Mvar
DC filters315kV
43kV
20kV
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One line diagram: SVC mode
TSC154Mvar
5/11 and 7/13filters 70Mvar
HP filter55Mvar
HP filter55/12Mvar
DC filters315kV
43kV
20kV
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Control Performance Verification
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Testing of Control System
Development of Master Control - DCU (De-icer Control Unit)
Validation of DNP3 Communication
Type test on Real Control (System V)
Static and Dynamic Performance Test on DevelopmentControl Cubicle & Simulator
Additional tests on a Control Replica at IREQ
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Additional Testing on a Control Replica (RSPC1)
Provide additional testing facility ( In parallel to Factory Test)
MBPSS( Multi-Band Power System Stabilizer)Geomagnetic influenceContingencies (additional validation)
Final validation of UCD Validation of Acceptance Test programTraining (Operator and Field technician)
PrimaryPrimary ObjectivesObjectives
Replica connected to HYPERSIM (IREQ simulator)
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Additional Testing on a Control Replica (RSPC1)
TCR VBE
TSC VBE
SVC/Decier Control &Protection
PROFIBUSMASTER
A/I
A/O
D/I
D/O
PowerSupply
HYPERSIM
APEX
UCD
HYPERSIM
PROFIBUSSLAVE
VALVE FIRING
VALVE FIRINGDATA BACK
Interface
FIRING SIGNAL
MBPSSFunction
Equivalent AC networkTSC valveTCR/De-icer valveReactive elementsCoupling transformersEarthing transformersDischarge transformer
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Simulator Setup
HYPERSIM
RSPC1
UCD
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De-icer mode
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Preparation for commissioning
Deicer mode - particular tests singled out 1. Converter Deblocking in current control
2. Review trip sequence – Overvoltage caused by remote isolation of the converter
3. Dc voltage measurement failure
4. Ac Voltage Error (Fuse failure)
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Remote Isolation of the Converter
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Normal Shutdown Sequenceby local breaker opening
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Deicer mode – Remote Shutdown
No control action
Severe Overvoltage
when connected to longest (247km) line
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Deicer mode – Remote Shutdown
Current detection & Control action
No Overvoltage
Preliminary investigationLocal detection preferred
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Limitation of OvervoltageNew Protection Philosophy
629.77
389.12
0
100
200
300
400
500
600
700
600 1200 1800 2400 3000 3600 4200 4800 5400 6000 6600 7200 7800
Iorder (A)
Vhvm
ax (k
V)
Existing With New Prot Philosophy
kV
kV
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De-icer installation
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De-icer installation
DC converter valves
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De-icer installation
AC coupling reactors
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De-icer installation
HV connections and transformer
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De-icer installation
Harmonic filters
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De-icer installation
DC filters and DC bus
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De-icer installation
Aerial view of the de-icer
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De-icing tests
Connecting de-icer to line
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Commissioning
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TCR current
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Response to undervoltage
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Response to overvoltage
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Bridge 2 deblocked
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Ramp Up 3300A to 7200A
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Ramp Up 3300A to 7200A TSC Unblocked
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Ramp Down 5000 A to Standby
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Ramp Down 5000 A to Standby
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Ramp Down 5000 A to Standby
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Shutdown
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Shutdown – Action of ERM
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De-icer
In service as an SVC during the winter
Unique project made possible by good collaboration between Hydro Québec and AREVA
Many technical hurdles overcome to make the installation a success