ABOC/ATC days Electrical Network: Selectivity and Protection Plan José Carlos GASCON TS–EL Group...
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Transcript of ABOC/ATC days Electrical Network: Selectivity and Protection Plan José Carlos GASCON TS–EL Group...
ABOC/ATC daysABOC/ATC days
Electrical Network:Electrical Network:Selectivity and Protection PlanSelectivity and Protection Plan
José Carlos GASCONJosé Carlos GASCONTS–EL GroupTS–EL Group 22 January 200722 January 2007
IntroductionIntroduction SelectivitySelectivity CERN HV electricalCERN HV electrical 2929thth July 2006 July 2006 Selectivity at CERNSelectivity at CERN Project PlanningProject Planning
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
SummarySummary
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
IntroductionIntroduction
SwitchgearSwitchgear
ProtectedProtectedareaarea
Protective Protective relayrelay
MeasurementMeasurement
OrderOrder
SensorSensor
SourceSource
Protection systemProtection system in the electrical in the electrical networknetwork
Switchgear: in charge of clearing faults Sensors: providing measurements to detect faults Protective relays: processing measurements and
ordering to clear faults
Why protection system is neededWhy protection system is needed Personnel safety against electrical hazards Avoid equipment stress: thermal, electrical and
mechanical damages Assure network stability Clear electrical faults and maintain service
continuity
Features of protection systemFeatures of protection system Fast Reliable Selective
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
IntroductionIntroduction
DefinitionDefinition Discrimination between protection systems,
isolating a faulty area of the electrical network as quickly as possible and leaving all the fault-free areas energized
How to doHow to do Time based discrimination Current based discrimination Logic discrimination Directional protection discrimination Differential protection discrimination Combined
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
SelectivitySelectivity
ParametersParameters The complexity and size of the electrical network Network architecture Existing sources and their response in the event of a fault Operating time of each protection system Backup time Compromise continuity of service vs. degree of protection
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
SelectivitySelectivity
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
Selectivity: examplesSelectivity: examples
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Radial Radial distributiondistribution Loop distribution (ex.: Loop distribution (ex.:
SPS)SPS)
ComplexityComplexity Voltage levels: 400kV, 130kV, 66kV, 20kV, 18kV and
3,3kV 94 HV substations: 38 LHC, 26 SPS and 30 Meyrin 4 sources: EDF (400kV & 20kV), EOS and Diesel
Generators 3 different interconnected networks by site:
o LHC: Machine, General Services and Safety (Assured)o SPS: Pulsed, Stable and Safety (Assured)o Meyrin: Pulsed, General Services and Safety (Assured)
Sites interconnected by 18kV links Power flow direction depending on the configuration About 1,000 protective relays and switchgears Compensators and harmonic filters Diversity of loads: pumps, converters, dipoles,
transformers, compressors Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
CERN HV Electrical NetworkCERN HV Electrical Network
Protection systemProtection system Switchgears from all ages : specific clearing time
for each generation Different technologies in protective relays
40% digital, 40% electronics and 20% electromechanical
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
CERN HV Electrical NetworkCERN HV Electrical Network
1 ph. fault detected in neutral reactance 3 ph. detected by all prot. but blocked
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
2929thth July 2006 (I) July 2006 (I)EDF- 400 kV
EOS - 130 kV
ME10 – 18kV
ME9 – 18kV
SEM12 – 18kV
BE9 – 18kV
SEH9 – 66kV
EHD27
201
412
200
901 900
701
209
800
114
311 104 204 210 304
EHD21
801
LHC LOOP
ASS HALL
N.A. LOOP
SPS LOOP
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MEYRIN SITE
EHT7/E966/18 kV70 MVA
EHT102/1E66/18kV70MVA
T5400/66 kV110 MVA
802
EHT612/1E130/18 kV
60 MVA
Earthing transformer !
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11stst fault events fault events
Protections trip 66kV and 130kV sources
EDF- 400 kV
EOS - 130 kV
ME10 – 18kV
ME9 – 18kV
SEM12 – 18kV
BE9 – 18kV
SEH9 – 66kV
EHD27
201
412
200
901 900
701
209
800
114
311 104 204 210 304
EHD21
801
LHC LOOP
ASS HALL
N.A. LOOP
SPS LOOP
....
MEYRIN SITE
EHT7/E966/18 kV70 MVA
EHT102/1E66/18kV70MVA
T5400/66 kV110 MVA
802
EHT612/1E130/18 kV
60 MVA
Earthing transformer
3 ph. detected by all prot. but blocked
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
2929thth July 2006 (II) July 2006 (II)
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22ndnd fault after “autotransfer system” fault after “autotransfer system”
Protection trips at 66kV source
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Power cutsPower cuts LHC General Services SPS Stable loop North Area Stable loop Meyrin site: West Area and PS, ISOLDE and
Administrative loops
After analyse of the eventAfter analyse of the event Difficult selectivity between 66kV and 18kV
levels Backup time not adapted for this scenario If selectivity, power cut reduced to the Meyrin
site and lower reestablishment timePrepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
2929thth July 2006: consequences July 2006: consequences
EDF- 400 kV
EOS - 130 kV
ME10 – 18kV
ME9 – 18kV
SEM12 – 18kV
BE9 – 18kV
SEH9 – 66kV
EHD27
201
412
200
901 900
701
209
800
114
311 104 204 210 304
EHD21
801
LHC LOOP
ASS HALL
N.A. LOOP
SPS LOOP
....
MEYRIN SITE
EHT7/E966/18 kV70 MVA
EHT102/1E66/18kV70MVA
T5400/66 kV110 MVA
802
EHT612/1E130/18 kV
60 MVA
Earthing transformer
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
2929thth July 2006: selective July 2006: selective
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Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
Selectivity at CERNSelectivity at CERN Implemented selectivityImplemented selectivity
400kV backup agreed with EDF LHC General Services and Machine SPS pulsed and stable loops PS, ISOLDE and Administrative loops
Non-selective areas Non-selective areas (tripping 66 kV)(tripping 66 kV) Autotransfert system (BE9, SEM12 and ME9 substations) West Area North Area LHC-1 and LHC-5 (in project)
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
Planning (I)Planning (I)
Activities in progressActivities in progress Catalogue of protective relays: 60% completed Short circuit calculations: under approval
Selectivity Phase 1 (April 2007)Selectivity Phase 1 (April 2007) Selectivity study for the non-selective areas Data base for all protective relays installed Provisional solution for the non-selective areas
Prepared by José Carlos GASCONJosé Carlos GASCON ATC/ABOC DaysATC/ABOC Days 22 January 2007
Planning (II)Planning (II)
Selectivity Phase 2 (January 2008)Selectivity Phase 2 (January 2008) Definitive solution for non-selective areas Complete selectivity map for main substations
and configurations Implementation Commissioning
Selectivity Phase 3 (in the course of Selectivity Phase 3 (in the course of 2008)2008)
Selectivity map for the whole CERN HV network Transient simulations for main substations (BE,
BE9, ME10, ME9, SEM12)
ABOC/ATC daysABOC/ATC days
Electrical Network:Electrical Network:Selectivity and Protection PlanSelectivity and Protection Plan
José Carlos GASCONJosé Carlos GASCONTS–EL GroupTS–EL Group 22 January 200722 January 2007
Questions?Questions?