Langgpdon SVC Replacement APIC 2010 - apic/uploads/Forum/Langdon SVC...Langgpdon SVC Replacement APIC

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Langdon SVC Replacement g pAPIC 2010

Colin Clark

APIC Power & Energy Innovation Forum

Varun Chhibbar

OutlineOutline

DefinitionsDefinitions Purposes of the Langdon SVC

Th L d SVC R l t P j t The Langdon SVC Replacement Project Design Improvements Lessons learned HighlightHighlight

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DefinitionsDefinitions

Static Var Compensator (SVC)Static Var Compensator (SVC) Controls reactive power with conventional

Inductors and CapacitorsInductors and Capacitors Acts as a variable shunt impedance

Thyristor or SCR Silicon Controlled Thyristor or SCR Silicon Controlled RectifierV l b k t b k th i t i ith Valve a back to back thyristor pair with snubber circuit

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Definitions ContDefinitions Cont TCR Thyristor Controlled ReactorTCR Thyristor Controlled Reactor TSC Thyristor Switched Capacitor

6 Pulse SVC fires 6 times per cycle 6 Pulse SVC fires 6 times per cycle 12 Pulse SVC fires 12 times per cycle

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12 Pulse SVC(Old Langdon SVC)

240 kV

20 kV20 kV

TCR TSC TCR TSC13th11th 23th 13th11th 23th

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Langdon SVC FunctionallityLangdon SVC Functionallity Voltage control of the 240 kV bus (253 kV)

S t di t b System disturbance response Reduce overvoltages for 1201L energization

t ior trip Improve system performance during load

h ddishedding Increase stability limit of the network Assist operators with dispatch of switched

capacitor banks

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Main Project DriversMain Project Drivers Control system no longer supported (1985) Few thyristor spares remaining UV damage and checking of main air coreUV damage and checking of main air core

reactors Inherent cooling issues that limited output Inherent cooling issues that limited output

Reactor valve overheating due to cooling system failure June 2nd 2008

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Langdon Project RequirementsLangdon Project Requirements

Like for like replacementLike for like replacement AESO request - capability to control

remote mechanically switched capacitorsremote mechanically switched capacitors Same physical location (P&L for fence)

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APIC Power & Energy Innovation Forum

APIC Power & Energy Innovation Forum

APIC Power & Energy Innovation Forum

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2 x 3 AL FLAT BUS2 x 3 AL FLAT BUS

1/2 COPPER TUBING1/2 COPPER TUBING

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The Langdon ProjectThe Langdon Project+ Two Phases+ Phase One complete December 19th 2008

- 4 months to replace TCR valves etc4 months to replace TCR valves, etc. Different cooling pressure and firing signalsThree control systems (CWC-85, VarMach-99, Mach2-08)y ( , , )

+ Phase Two complete November 26th 2009Replace remaining equipment- Replace remaining equipment

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Actual VI CurveActual VI Curve Rating

250 MVAr @ 1.0pu 302.5 MVAr @ 1.1 pu473 MVAr Rx, 10 min overload

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HMI HMI Single LineSingle Line

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HMI HMI -- CoolingCooling

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APIC Power & Energy Innovation Forum

12 Pulse SVC(New Langdon SVC)

240 kV

20 kV20 kV

TCR TSC TCR TSC12th 12th

31 MVAr 31 MVAr156 MVAr 94 MVAr 94 MVAr156 MVAr

APIC Power & Energy Innovation Forum

156 MVAr 94 MVAr 94 MVAr156 MVAr

Design Improvementsg p Simplified filter design Elimination of legacy air switches Bus protection without groundingBus protection without grounding

transformers Enhanced surge protection Enhanced surge protection Thyristor replacement without draining

licooling

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Design Improvementsg p Lifecycle sparing approach 220 line items Cooling: fewer piping connections, SS

versus PVC, pump HMI, p p Controls over DNP with hardwire backup Low noise design Low noise design Bird and rodent resistant

APIC Power & Energy Innovation Forum

APIC Power & Energy Innovation Forum

APIC Power & Energy Innovation Forum

APIC Power & Energy Innovation Forum

APIC Power & Energy Innovation Forum

Langdon SVCProtection Block Diagram

240 kV

20 kV20 kV

TCR TSC TCR TSC12th 12th

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Lessons LearnedLessons Learned

Design ReviewsDesign Reviews

86-1 Breaker TC1Trip

86-2 Breaker TC2Trip

Trip Logic

APIC Power & Energy Innovation Forum

Lessons LearnedLessons Learned

Design ReviewsDesign Reviews

86-1 Breaker TC1Trip

86-2 Breaker TC2Trip

Trip Logic

APIC Power & Energy Innovation Forum

Lessons LearnedLessons Learned

Design ReviewsDesign Reviews

86-1 Breaker TC1Trip

86-2 Breaker TC2Trip

Trip Logic

APIC Power & Energy Innovation Forum

Lessons LearnedLessons Learned

Design ReviewsDesign Reviews

86-1 Breaker TC1Trip

86-2 Breaker TC2Trip

Trip Logic

APIC Power & Energy Innovation Forum

Lessons LearnedLessons Learned

Design ReviewsDesign Reviews

86-1 Breaker TC1Trip

86-2 Breaker TC2Trip

Trip Logic

APIC Power & Energy Innovation Forum

Lessons LearnedLessons Learned

Design ReviewsDesign Reviews

86-1 Breaker TC1Trip

86-2 Breaker TC2Trip

Trip Logic

APIC Power & Energy Innovation Forum

Lessons LearnedLessons Learned Clear outage plans Study models Never assumeNever assume Involvement of field technicians

O li f i ti Open lines of communication On-site supervision Clear Interface points

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Lessons LearnedLessons Learned On-site involvement of ACC operator Burn-in period Local project managementLocal project management Complications due to phase approach

K l d bl i i i t ff Knowledgeable commissioning staff Built in fault recording system

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HighlightHighlight

Trip the inter-tie with BC (1201L) underTrip the inter tie with BC (1201L) under different import and export conditions

Operate the SVC at its thermal limit

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APIC Power & Energy Innovation Forum

QUESTIONS?Q

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