Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System October 24-26, 2012 THE HIGH-VOLTAGE NETWORK OF CERN TRANSMISSION AND TRANSPORT NETWORK Davide Bozzini Head of the High Voltage Section EL Group EN Department CERN

Transmission and transport network  Major events can happen …  The network current configuration  Numerical model of the network  Loads versus configurations  Status of upgrade and extension plan  Conclusion October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Outline Davide Bozzini - 2

Major events can happen …. … to the CERN high voltage electrical network History of some major known events (1/3)  1993: explosion of the 400 kV CERN incomer breaker  EDF Network unavailability: 92 hours  Cost of accident (excluding new breaker) 600 kCHF  Physics unavailability: 6 days  What if the same event occurs today  RTE Network unavailability: 92 hours  92 hours transfer of 60 MVA from RTE to SIG 218 kCHF  Not possible to grant minimal conditions for cryogenic stand-by  Injectors unavailability: 6 days  LHC unavailability: > 40 days (filling and restart of cryogenics) October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 3

Major events can happen …. … to the CERN high voltage electrical network History of some major known events (2/3)  2006: explosion of the ME9 – 43 years old, 18 kV breaker  Network back to normal operation after 10.5 hours  Black out on Meyrin including safety network, etc..  One of the conclusions pointed out by the manufacturer was the end of life and ageing of equipment and urged to replace it  Since 2006 the same equipment is still in operation October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 4

Major events can happen …. … to the CERN high voltage electrical network History of some major known events (3/3)  Failures on power cables: Figures of SPS networks  42 km of underground 18 kV lines energized since July 1973  60 known events in the last 31 years  Consolidation program approved and to be terminated by 2013 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 5 During the visit of yesterday we had an additional fault

Major events can happen …. … to the CERN high voltage electrical network Preliminary conclusion  Recommended actions to mitigate the major events have been implemented only for the last case  Today the Meyrin site depends fully from the 43 years old substation ME9  High downtime of accelerator running due to missing redundancies  Ageing of equipment is a real issue October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 6

Purpose of this talk Explain the evolution of the transmission network in order to:  Guarantee the supply for the CERN power requirements until the HL-LHC (2025)  Allow the physics program to continue with the network operating in degraded modes  Upgrade the ageing substations without impacting the accelerators schedule  Increase availability of network in case of equipment failure October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 7

The network configuration today October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 8 NOT INCLUDED IN THIS TALK ▶ The distribution network including the SPS ▶ Talk given by H. De Maynard ▶ The compensation of the reactive power ▶ Talk given by K. Kahle ▶ Protection and coordination issues ▶ Talk given by JP. Sferruzza NOT INCLUDED IN THIS TALK ▶ The distribution network including the SPS ▶ Talk given by H. De Maynard ▶ The compensation of the reactive power ▶ Talk given by K. Kahle ▶ Protection and coordination issues ▶ Talk given by JP. Sferruzza

The transmission network today October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 9 TRANSMISSION NETWORK ▶ 10 Power transformers ▶ 2 – 400/66 kV, 110 MVA ▶ 1 – 400/18 kV, 90 MVA ▶ 7 – 66/18 kV, 38 and 70 MVA ▶ 16 Power lines ▶ 6 at 66 kV from 55 to 70 MVA ▶ 5 at 18 kV from 30 to 60 MVA ▶ 5 at 18 kV rated 15 MVA ▶ 8 Substations ▶ 1 outdoor 400 kV – SEH9 ▶ 1 outdoor 66 kV – SEH9 ▶ 6 indoor 18 kV – ME10, ME9, ME59, SEM12, BE9, BE TRANSMISSION NETWORK ▶ 10 Power transformers ▶ 2 – 400/66 kV, 110 MVA ▶ 1 – 400/18 kV, 90 MVA ▶ 7 – 66/18 kV, 38 and 70 MVA ▶ 16 Power lines ▶ 6 at 66 kV from 55 to 70 MVA ▶ 5 at 18 kV from 30 to 60 MVA ▶ 5 at 18 kV rated 15 MVA ▶ 8 Substations ▶ 1 outdoor 400 kV – SEH9 ▶ 1 outdoor 66 kV – SEH9 ▶ 6 indoor 18 kV – ME10, ME9, ME59, SEM12, BE9, BE

The transmission network today October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 10 LHC LHC 66 kV NETWORK ▶ Machine network ▶ Radial distribution ▶ Hardware already dimensioned for future power increase ▶ In case of equipment failure ▶ LHC physics is down ▶ Cryogenics in stand-by mode LHC 66 kV NETWORK ▶ Machine network ▶ Radial distribution ▶ Hardware already dimensioned for future power increase ▶ In case of equipment failure ▶ LHC physics is down ▶ Cryogenics in stand-by mode

The transmission network today October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini kV LEVEL ▶ Normal operation ▶ Meyrin, mixing of general services and machine networks ▶ Power lines rated 15, 30 and 60 MVA while available sources are rated 60, 70 or 90 MVA ▶ Both main sources RTE and SIG are single line supply with no back-up 18 kV LEVEL ▶ Normal operation ▶ Meyrin, mixing of general services and machine networks ▶ Power lines rated 15, 30 and 60 MVA while available sources are rated 60, 70 or 90 MVA ▶ Both main sources RTE and SIG are single line supply with no back-up

Numerical model of the network October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 12 THE MODEL ▶ The entire CERN high voltage network (3.3 to 400 kV) is modeled using the ETAP Software ▶ The model of the transmission network is complete ▶ Used for engineering purposes (short circuit current calculation, ampacities, etc..) ▶ In-situ data collection for as-built unknown parameters is ongoing ▶ 80% of the as built parameters are implemented the remaining are default values ▶ The model of the transmission network is used to verify expected power flow in different operating modes THE MODEL ▶ The entire CERN high voltage network (3.3 to 400 kV) is modeled using the ETAP Software ▶ The model of the transmission network is complete ▶ Used for engineering purposes (short circuit current calculation, ampacities, etc..) ▶ In-situ data collection for as-built unknown parameters is ongoing ▶ 80% of the as built parameters are implemented the remaining are default values ▶ The model of the transmission network is used to verify expected power flow in different operating modes Transformer Power [MVA] Primary voltage [kV] Secondary voltage [kV] Z1 [%] Z0 [%] X/R [-] EHT EHT EHT EHT EHT EHT102/1E EHT102/2E EHT103/2E EHT102/4E EHT102/6E EHT102/8E EHT7/E EHT EHT EHT EHT * 50.0* EHT *7.09*34.1* EHT103/1E *7.09*29.3* Power line Voltage [kV] Phase current [A] Power [MVA] Cable Type Conduc tors per phase Length [km] L Al 3x500mm L Al 3x500mm L Al 3x400mm L Al 3x400mm L Al 3x500mm L Al 3x400mm BE-BE Cu 3x400mm MP Al 3x630mm MP Al 3x630mm MP Cu 3x630mm 2 23 SW Cu 3x630mm CERN Cu 3x500mm

Numerical model of the network October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 13 Snapshot of 2012 Power flow nominal configuration

Loads vs configuration October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 14 NOTES 4 loads scenario (L) 4 configurations (C) 3 Long shutdowns NOTES 4 loads scenario (L) 4 configurations (C) 3 Long shutdowns L: 2012 C: 2012 L: 2014 C: 2012 L: 2014 C: 2014 L: 2018 C: 2014 L: 2018 C: 2018 L: 2025 C: 2018 L: 2025 C: 2025 LS2 LS3 LS1 The model will allow to:  Check future load with existing and future configuration  Identify critical elements  Verify network extension  Confirm network layout changes   

Loads 2012 vs configuration 2012 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 15 NOTES Single failure scenario OK 4 out of 6 degraded modes require power from SIG NOTES Single failure scenario OK 4 out of 6 degraded modes require power from SIG Example: Major failure of EHT 102/1E -27 MVA from SIG (53 % of available load) -Energy over cost: 8.7 MCHF/year (EDMS ) -Additional cost of energy based on 6 months for repair gives 4.35 MCHF

Loads 2014 vs configuration 2012 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 16 NOTES No more margin for normal configuration Only three degraded modes out of 6 possible at full load Failure of EHT4 or EHT5 -> LHC physic stop Faults may require lasting of users (machine networks) 4 out of 6 degraded modes on SIG NOTES No more margin for normal configuration Only three degraded modes out of 6 possible at full load Failure of EHT4 or EHT5 -> LHC physic stop Faults may require lasting of users (machine networks) 4 out of 6 degraded modes on SIG

Configuration for 2014 – after LS1 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 17 CHANGES ▶ New 66 kV power line (L9) to Meyrin ▶ New MEH59, 66 kV, 70 MVA, outdoor substation ▶ New 18 kV, 60 MVA, back-up power line (MP10) fed from EHT3/BE ▶ Renovation of existing ME59, 18 kV indoor substation ▶ 3 sources of energy ▶ Hosting the new machine network of Meyrin site CHANGES ▶ New 66 kV power line (L9) to Meyrin ▶ New MEH59, 66 kV, 70 MVA, outdoor substation ▶ New 18 kV, 60 MVA, back-up power line (MP10) fed from EHT3/BE ▶ Renovation of existing ME59, 18 kV indoor substation ▶ 3 sources of energy ▶ Hosting the new machine network of Meyrin site The four projects are ongoing now The four projects are ongoing now MP10 L9 ME59 MEH59

Loads 2014 vs configuration 2014 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 18 NOTES Operation of LHC and other physics programs are granted New transformer EHT6 allows operation with increased loads Single failure degraded modes are all covered 3 out of 6 degraded modes requires energy from SIG NOTES Operation of LHC and other physics programs are granted New transformer EHT6 allows operation with increased loads Single failure degraded modes are all covered 3 out of 6 degraded modes requires energy from SIG

Loads 2018 vs configuration 2014 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 19 NOTES EHT4 and EHT5 almost at nominal power 3 degraded modes require energy from SIG 6 additional years of operation with the pending issue of SIG supply in case of major fault Ageing substations NOTES EHT4 and EHT5 almost at nominal power 3 degraded modes require energy from SIG 6 additional years of operation with the pending issue of SIG supply in case of major fault Ageing substations Remember - 6 months for repair require 4.35 MCHF

Configuration for 2018 – after LS2 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 20 CHANGES ▶ Upgrade of substation ME9 ▶ Second source for the 400 kV ▶ Installation of EHT6, 400/66 kV, 220 MVA power transformer ▶ Flexibility for maintenance of the 400 kV and 66 kV components CHANGES ▶ Upgrade of substation ME9 ▶ Second source for the 400 kV ▶ Installation of EHT6, 400/66 kV, 220 MVA power transformer ▶ Flexibility for maintenance of the 400 kV and 66 kV components ME9 EHT6

Loads 2018 vs configuration 2018 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 21 NOTES Loads well balanced Full redundancy at the level of 400/66 kV level One degraded mode require power from SIG Remains an issue with MP7 if we do not want to load SIG NOTES Loads well balanced Full redundancy at the level of 400/66 kV level One degraded mode require power from SIG Remains an issue with MP7 if we do not want to load SIG

Loads 2025 vs configuration 2018 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 22 NOTES All power scenarios covered One case (EHT102/1E unavailability) require power from SIG (47 % = 29 MVA) due to the limitation at 30 MVA of MP7 NOTES All power scenarios covered One case (EHT102/1E unavailability) require power from SIG (47 % = 29 MVA) due to the limitation at 30 MVA of MP7

Configuration for 2025 – after LS3 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 23 CHANGES ▶ Upgrade power line MP7 from 30 to 60 MVA ▶ Hot spare 66 kV, 70 MVA transformer in point LHC1 ▶ Overhaul of substation ME10 and SEM12 ▶ New power lines scheme from ME10 to SEM12 ▶ Redundancy of SIG supply for optimized autotransfert CHANGES ▶ Upgrade power line MP7 from 30 to 60 MVA ▶ Hot spare 66 kV, 70 MVA transformer in point LHC1 ▶ Overhaul of substation ME10 and SEM12 ▶ New power lines scheme from ME10 to SEM12 ▶ Redundancy of SIG supply for optimized autotransfert HOT SPARE MP7 to 60 MVA New power lines from ME10 to SEM12 ME10 SEM12

Loads 2025 vs configuration 2025 October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 24 NOTES Power load flow optimized High flexibility for reconfiguration of network Disruptions to infrastructure and accelerators operation are minimized NOTES Power load flow optimized High flexibility for reconfiguration of network Disruptions to infrastructure and accelerators operation are minimized

Configuration for kV 60 MVA meshing October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 25 SUMMARY ▶ Complete meshing at the level of 18 kV rated 60 MVA ▶ At least 3 sources 60 MVA rated available on each transmission substation ▶ Internal failures covered without SIG source ▶ SIG only necessary in case of loss of the 400 kV in Bois- Tollot SUMMARY ▶ Complete meshing at the level of 18 kV rated 60 MVA ▶ At least 3 sources 60 MVA rated available on each transmission substation ▶ Internal failures covered without SIG source ▶ SIG only necessary in case of loss of the 400 kV in Bois- Tollot

Autotransfer : Evolution and limits October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 26  Automatic switching system managing independently the transmission substation according to available power sources  Actual configuration is limited to the transmission substations  ME9  BE9  SEM12  Actions are taken in case of:  Loss of the RTE 400 kV or SIG 130 kV sources  Loss of normal supply in the substations ME9, BE9, SEM12 following a components failure (transformer, power line, breacker)  The evolution of the autotransfer will include the substations ME10, ME59 according to the upgrade and extension phases of the network

Status of projects - Ongoing today Meyrin October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 27 LS1 Upgrade of 18 kV transport power lines LS1 Upgrade of 18 kV transport power lines LS1 New MEH LS1 New MEH – LS1 Upgrade of ME – LS1 Upgrade of ME LS1 New MP10,18 kV, 60 MVA New L9, 66 kV, 70 MVA LS1 New MP10,18 kV, 60 MVA New L9, 66 kV, 70 MVA

Status of projects - Ongoing today Prevessin October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini LS1 New MP10,18 kV, 60 MVA New L9, 66 kV, 70 MVA LS1 New MP10,18 kV, 60 MVA New L9, 66 kV, 70 MVA SEH LS1 Extension of 66 kV outdoor substation SEH9 -One feeder line for MEH59 -One incomer for the future EHT LS1 Extension of 66 kV outdoor substation SEH9 -One feeder line for MEH59 -One incomer for the future EHT6 BE LS1 Extension of BE substation to connect MP10 power line LS1 Extension of BE substation to connect MP10 power line EHT Infrastructure for future EHT Infrastructure for future EHT6 SE LS1 Overhaul 66 kV protection system LS1 Overhaul 66 kV protection system

Status of projects – LS2 Meyrin October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 29 LS2 Upgrade of ME9 LS2 Upgrade of ME9

Status of projects – LS2 Prevessin October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 30 BEH9 LS2 New 66 kV, 220 MVA power line from BEH9 to Bois-Tollot LS2 New 66 kV, 220 MVA power line from BEH9 to Bois-Tollot EHT LS2 Outdoor 400/66 kV substation Installation of 220 MVA trasnformer 2015-LS2 Outdoor 400/66 kV substation Installation of 220 MVA trasnformer Bois-Tollot LS2 Installation of breaker 400 kV (The one never raplaced since 1993) LS2 Installation of breaker 400 kV (The one never raplaced since 1993)

Status of projects – LS3 Meyrin October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 31 LS3 EHT103/1 Hot spare trasnfo LS3 EHT103/1 Hot spare trasnfo LS3 New power lines scheme from ME10 to increase flexibility of the autotransfer system LS3 New power lines scheme from ME10 to increase flexibility of the autotransfer system EHT103 LS3 Upgrade of ME10 LS3 Upgrade of ME10 LS3 Upgrade of SEM12 LS3 Upgrade of SEM12

Conclusion October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 32  Ongoing activities (phase 1)  The projects which have been launched are necessary to operate the laboratory under nominal conditions after LS1  Despite consolidation Phase 1 for some degraded modes we still need energy from SIG  Phase 1 is mandatory to proceed with Phase 2 (2016 onward) to replace ageing substations like ME9  Plans after LS1  Covers the power requirements  Will allow to operate in degraded modes without SIG contribution  Continue to rejuvenate and consolidate the existing infrastructure

Acknowledgments October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 33  Members of the “Network 2025” working group  Denis ARNOULT,  Stefano BERTOLASI  Gerard CUMER  Francois DUVAL  Henry de MAYNARD  Contributors  Cedric RICHARD  Slawomir OLEK  Philippe TEILLET  Jean-Pierre SFERRUZZA  Konstantinos KARAVOTAS  Jerzy HALIK

Resources Management October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 34  New projects  Design studies done by EL group  Engineering and execution outsourced  Power lines installation - SDEL (FR)  Substation MEH59 – SAG (DE)  66 kV protection system – OVIT (HU)  EHT6 Bois-Tollot – contract to be placed in 2016  Hot spare transformer EHT103/1E – contract to be placed in 2018  Coordination done by EL group  Overhaul and extension of existing infrastructure  Engineered, coordinated and executed by the EL group  ME59  ME9  ME10  SEM12

Resources Budget October 24th, 2012 Review of the Project for the Consolidation and Upgrade of the CERN Electrical Distribution System Davide Bozzini - 35 Consolidation Projects Total Approved budget6,4075,0605,8385,8393,4061, ,846 Required payment budget9,2003,700 4,0004,1003,5004,0003, ,700 Consolidation SPS power cables (EL-SPS)8,5001,000 9,500 Consolidation 66 kV protection system (EL-PS)5001, ,800 Consolidation Meyrin West Area (EL-PS) 1, ,600 Consolidation Prevessin North Area (EL-SPS) 1,500 1,000 4,000 Consolidation substation SPS-5 (EL-SPS) ,300 Consolidation substation SPS-4 (EL-SPS) 1,0001,500 2,500 Consolidation substation SPS-2 (EL-SPS) 1,000 2,000 Consolidation substation SPS-1 (EL-SPS) 1,000 2,000 Consolidation substation SPS-6 (EL-SPS) 1,5001,000 2,500 Consolidation substation SPS-3 (EL-SPS) 1,5001,000 2,500 Consolidation LHC 18 kV protection system (new) 1,5002,500 4,000 Upgrade Projects Total Approved budget Required payment budget7,5008,2004,4003,4003,5005,0004,000 2,500 45,000 New 66kV power line to Meyrin (EL-NET2025)1,400 New substation MEH59 (EL-NET2025)6002,2001,700 4,500 New substation BE91 (EL-NET2025)3,5003,700 7,200 Upgrade substation BE (EL-NET2025) ,800 Upgrade ME59 (EL-NET2025)1, ,200 5,200 Upgrade loop ME4 700 Upgrade power lines ME59 --> ME9 1,200 Upgrade power lines ME9 - SEM12 - ME10 1,500 3,000 Mew substation 220 MVA Bois-Tollot 2,0003,5001, ,500 Upgrade ME9 1,5002,5001,000 5,000 Upgrade ME10 2,500 Upgrade substation SEM12 LHC1 2,500 5,000