long shutdown 2013: electrical distribution activities

Long shutdown 2013:Electrical distribution activities

09/03/2012IEFC 2012 Workshop

F. Duval on Behalf of EN/EL group

• Activities during LS1

• Ongoing consolidation & upgrade details

• After LS1 activities

Electrical distribution activities

IEFC Workshop - François Duval 209/03/2012

Next talk is dedicated to cabling activities (copper & fibres)

• 3 different types of activities:

1. Consolidation and upgrade of the Electrical Network

The ageing EL infrastructure must be updated to significantly increase availability rate and to meet CERN new requirements.

Beyond the present CERN needs, these renovation activities have been defined according to the future CERN power demand. That’s why EL have worked with users on a 15 years power demand forecast.

A complete program of consolidation & upgrade have been defined until 2025 and will be edited soon. This program cost is estimated at approximately 80 MCHF and shall be concentrated on 3 long shutdowns starting with LS1.

Activities during LS1



2. Maintenance operations

Since 2009 and the LHC start up, many maintenance operations have been postponed (mainly on 400 kV and 66 kV substations) because Christmas breaks have been shortened and because LHC Cryo could not be stopped. These postponed maintenance tasks must be done in 2013 in addition to regular scheduled maintenance.

A complete stop of the 400 kV will be necessary for 4 weeks (in April 2013) to maintain the 400 kV circuit breakers and accessories. RTE will take profit of this stop to run its own maintenance program on the Bois-Tollot substation and on the Genissiat/Bois-Tollot Over Head Line. During these 4 weeks, only 60 MVA will be available from the substation on Swiss SIG side. (close to A gate in Meyrin) 60 MVA are enough to run CERN with all accelerators turned off but the cost of energy is 1.5 times the French price. (Coordination needed to avoid high consuming LS1 activities during this period)




3. Requests from users

Many requests have been announced and must be detailed in terms of workload and schedule.The estimated EL contribution, for all the requests known today matches the maximum acceptable by ELThe major requests, not including LHC, are

- LINAC 4 and its connection to the Booster- HIE ISOLDE- RAMSES system- Filters and compensators upgrades- Experiments: ELENA, COMPASS, NA62, East Hall B157- PS access project- LIU activities



• EL is increasing sharply its manpower in order to face a huge program of work.

– Manpower of EL was 72 in 03/2011, 82 in 03/212 and is expected to be 88 in 01/2013

– Agreements have been signed with AGH Krakow to have 12 technicians operational in 2013.

– 3 fellows, 4 PJAS, UPAS and 2 tech. students already joined the group

– It’s important to have them early enough to integrate and train them so that they will be fully operational for the highest workload period

– Having more people will become inefficient because of a lack of supervision



• Prioritisation

– In spite of the substantial increase of EN-EL resources our workload is already at 100% of our capacity

– Further requests will leads to prioritisation of activities by LS1 management



Priority Definition

0 safety

1 Beam to 6.5 - 7 TeV

2 Reliable operation

3 CERN approved projects

4 Not approved projects

Ongoing consolidation & Upgrade


Reminder: • Replace ageing and/or not reliable equipment

• Simplification for better operations and reliable protection systems

• Standardisation for easier maintenance & operation

• Elimination of identified weak points

• Redundancy availability

• Characteristics adapted to the CERN future needs

Reliability – Availability – Safety – Evolution



Power cables 3.3/18/66 kV, control cables and optical fibres 90 km in 7 km long trenches

Tubes buried in 2011 Cables pulled in 2012 Cables connected and

commissioned during LS1

Cost: 17 MCHF 6 FTE

SPS Power Cables: Layout



SPS Power Cables: tubes laying



SMB- SPS Power Cables: cables length 1971

2011

18 km cable> 80 joints

18 km cable8 joints



• Laying of cables during machine operation• Works executable out of LS1 period• Contractually shall be terminated before August 2012

SPS Power Cables: Pulling cables

• We ask to be allowed to pull the cables into the BAs during machine run (risk of theft)

Pulling machine



CCC Re-powering - Prevessin

CCC2012 New Substation BE91

2012New 3.3 kV power generation station

Redundant feeders18 kV network3.3 kV secured network400 V distribution network



CCC repowering - BE91 Substation

WHY: Increase 18 kV Prévessin

distribution Creation of a secured

power station for the SPS and Prévessin

Construction of a new LV substation to ensure full redundant infrastructure (EL + CV) for the CCC

After LS1 Activities


Meyrin 2012

Main substation ME9

Main substation ME59

Today Meyrin + LHC1 feeder 66 kV from Prevessin

B513 as an example of Meyrin User

Alternative feeder from SIG



Meyrin 2015

Main substation ME9

New 66 kV from Prevessin

66 kV substation MEH59

Main substation ME59

Today Meyrin + LHC1 feeder 66 kV from Prevessin

B513 as an example of Meyrin User

Alternative feeder from SIG



• Redundant feeder for Meyrin• Necessary step to cope with power increase after LS1• Necessary step to allow Meyrin consolidation between LS1 and LS2

MEH59ME59

ME59 - Indoor 18 kVMEH59 - Outdoor 66 kV

66 kV in Meyrin- MEH59 Substation

B 112



Configuration since 1966

2014

Then…

• Two phases to redistribute power flow• After 2013, the rest of the job can be

done during machines runs.

ME59 Substation

Local distribution

Rest of Meyrin



Other projects•BA5 substation replacement

₋ First replacement of 6 SPS substations₋ Replacement include 18 kV, 230 V switchboards and 48 V redundant battery

charger system

•66 kV protection upgrade₋ Upgrade for advanced digital functionality₋ Replacement of ageing electronics

•BE substation ₋ Necessary redistribution of cubicles to add new feeders (BE91, New SMB, etc)

•Computer center B513 dedicated loop₋ Power increase on ISOLDE loop means that B513 must be fed separately

•New SCADA system for power network supervision₋ Developed together with EN/ICE using PVSS technology₋ Upgrade for new functionality (power flow forecast, event replay,..)

Many consolidation & upgrade activities on the power network have already started in parallel with beam operations.

The final connections and commissioning, which can only be done during shutdowns, are scheduled for LS1.

In other words, EL workload will be high in 2012 as well.





Prevessin2013

Upgrade of BE substation

2012New 3.3 kV power generation station

2012 New Substation BE91

2011-2012SPS consolidation

2012-2013New 18 kV and 66 kV

power line to ME59 and MEH59

2013Consolidation 66 kV protection system

CERN Wide



Meyrin

2017-2019Upgrade of ME9

2019Upgrade ME10

2012New 18 kV and 66 kV from

BE and SEH9

2013New MEH59

2020-2021Upgrade SEM12

2015-2019Upgrade of 18 kV transport

power lines

2012-2015Upgrade of ME59

2014B513 dedicated loop

Direct redundancy lost in 2010: Network reconfiguration is now necessary

After LS1 Activities66 kV power demand upgrade

Redundancy limitEHT4/EHT5



Present configuration

09/03/2012 24IEFC Workshop - François Duval



LS2 upgraded configuration



Redundant configurationAdvanced upgraded configuration



Ideal configuration



Other activities

•Replacement of SPS substations

•North area consolidation & Upgrade

•PS distribution Upgrade (with LIU)

•West Area Upgrade (new projects)

Conclusions


The LS1 step cannot be missed by EL. Otherwise, most of the works will be postponed to LS2 (3 years)

The risk is a significant increase of failure rate due to:

• ageing electronics used in core protection relays• ageing devices (> 40 years)• loss of possible alternative configurations because of

increased power demands

long shutdown 2013: electrical distribution activities

Documents

period activities

renovation activities

lack of supervision

high consuming ls1 activities

maintenance program

maintenance operations

program cost

postponed maintenance