Why does HVDC Light power the Troll platform

Why does HVDC Light power the
Troll platform ?
Statoil presentation 5 - 6 Oct.
1.
The Troll Field
2.
The Troll Precompression Project
3.
Why HVDC light
4.
Challenges during project execution
5.
Key success factors
6.
Summary and lessons learnt
2
Troll - gas for Europe
• Europe’s biggest offshore gas
field in production
• 47 % of Norway’s gas reserves
• 28 % of Statoil’s total own
production (oil and gas)
• Important swing producer
3
Troll: Huge amounts of gas – and more to
come
Troll West
Oil Province
Troll West
Gas Province
Troll East gas reserves:
Troll
East
979 bill. Sm3
~230 bill. Sm3
produced by October
2005
Troll West gas reserves:
317 bill. Sm3
4
Troll – licence and
partnership
Owner Share
•
Petoro (State owned) 56,00 %
•
Statoil (gas operator) 20,81 %
Hydro (oil operator)
9,78 %
•
Shell
8,10 %
•
Total
3,69 %
•
ConocoPhillips
1,62 %
5
Troll A Precompression Project, TPK
Rectifier
Building
4 Electrical Cables
Precompression
and Rectifer
Modules
6
Troll A Precompression Project, TPK
7
Troll A Precompression Project, TPK
Value Goal
The main goals by increasing the production capacity on Troll A by
installation of new compression equipment are:
¾ Secure that Troll can deliver gas volumes as contractual committed
¾ Utilize the possibilities of increased gas sales
¾ To a larger extent exploite the price difference between the summer and
winter marked
¾ Secure other Statoils sales gas obligations in case other fields get start up - or other
unforseen delivery problems
Troll A Precompression Project, TPK
8
History – Driver selection
1997- 2000
–
Statoil cooperate screening and feasibility studies with the purpose of identifying environmental attractive power
solutions for the companies platforms in the North Sea
–
Qualification of potential vendors of electrical solutions (Siemens, Aker Elektro, ABB and some others)
–
ABB`s HVDC Light technology was found most attractive and a feasablity study was initiated with Troll as
reference case.
–
The technology was accepted feasible by Statoil in 2000
2000 -2002
–
Further dedicated Troll development studies of low pollution gas turbines solutions in competition with ABB
HVDC light solution
–
ABB HVDC light solution selected in May 2001 as the most competitive solution (lump sum offer from ABB)
–
Pre-engineering of selected solution
–
Electrical Drive System (EDS) contract signed between ABB Industri and Statoil in June 2002
2002 – 2005
–
Design, construction, installation and commissioning of EDS facilities
–
The EDS was successfully tested in February 2005
–
Start production 1.10.05
9
Troll A Precompression Project, TPK
Why HVDC Light.
Emissions to air
Troll emissions for turbine alternatives
(SCGT/CCGT)
Electric motors: No Troll emissions to air
10
Troll Precompression Project, TPK.
Why HVDC-Light.
Effect on global emissions to air
zGlobal emissions calculated based on
internal Statoil assumption that permanent
increased electricity consumption from the
grid in Norway is produced in a gas power
plant in Northern Europe:
–Electric motors results in 20 - 25% less
CO2 emissions globally compared with
single cycle gas turbines
–Phase 1 with combined cycle gas turbines
will result in about equal global CO2
emissions as for electric motors
11
Why did we choose HVDC-light
Weight
Estimates for two drives
Weight
Volume
Area
Price
(tons)
(m3)
(m2)
(MNOK)
Conventional LCI drive
1627
10020
432
1368
New technology
550
Troll A 4480
Troll A 320
708
HVDCLight +
Kollsnes
Kollsnes 1536
Powerformer
10752
12
Troll A Precompression Project, TPK
Overall evaluation of driver alternatives
Combined cycle gas turbines vs. electric motors
Gas turbines combined
with power generation
9Lowest costs
Electric motors
9In line with existing design of
Troll gas facilities
9No Troll emissions to air
9Robust with regards to
future environmental
constraints
9Possible positive effect on
Trolls environmental profile
9Robust with regards to
meeting start up date
9Better with regards to
operations, working
environment and safety
9Suitable for future low
manning mode
13
Troll A Precompression Project,TPK
Overall Project GOAL:
Develop and deliver a cost efficient precompression system 1.10.2005
¾ With a zero HSE mindset
¾ On schedule
¾ In accordance with expected quality and flexibility
¾ Within budget
14
Troll A Precompression Project,TPK
Electrical Drive System (EDS)
E xisting equipm ent
132 kV S w itchboard
K ollsnes
S ubsea
C able
H V D C Light R ectifier
H V D C Light
C able
P ow er
T ransform er
T roll A platform
H V D C Light Inverter
M otorform er
H V D C Light
R ectifier
N ot part of
EDS
P re-com pressor
40 M W
56 kV
G ear
15
Troll A Precompression Project, TPK
Challenges during project execution
¾ Qualification of cable joints
¾ Contractual problems between ABB and sub-contractor Emtunga
¾ Unacceptable vibrations in motor – compressor construction
¾ Leakages in welding joints in the offshore EDS structure
¾ High temperature in motor windings (Unexecptabel derating of
motors)
Successfully solved
16
Troll A Precompression Project, TPK
Key success factors
Planning and decision phase
¾ High focus on finding environmental attractive solution in Statoil
management and among the Troll partners
¾ Early selection of one potential electrical solution (HVDC light technology)
¾ Sufficient time to study, mature and qualify the technical solution and
establish confidence in Statoil and among the Troll partners to the HVDC light
technology and to ABB`s ability to deliver
¾ Building trust through open, close and good cooperation between top
expertise in Statoil, the Troll partners and ABB during engineering and
qualification of technical solutions
17
Troll A Precompression Project, TPK
Key success factors
Execution phase
¾ Continued open, close and good cooperation
¾ Common and jointly approach to problem solving
¾ Ability to find win-win solutions on difficult technical, commercial
and contractual challenges
18
Statoil experience with ABB in the TPK project
¾ Highly competent personnel
¾ High ethical standard and integrity on personnel
¾ Fair in business
¾ Openness in problem solving increased during project execution
¾ ABB AT in Norway played an important role in building bridge between
the offshore oil industry in Norway and the land based ABB industry
in Sweden
¾ Difficult relation and cooperation between EDS project and ABB OS
(later Vetco Aibel)
19
Summary – Lessons learnt
9 Important with high focus on HSE and good HSE results
9 When introducing new technology to the conservative oil business it is
important with early and close involvement with client and sufficient
time to study and mature the new technical solutions
9 Highly qualified personnel with high integrity, openness in problem
solving as well as fair in business build trust and confidence
9 Involvement of local ABB organizations with knowledge and
established relations with the relevant industry are beneficial for all
parties
9 The HVDC Light system installed in the Troll A Precompression
Project is working !!!!
Troll A Precompression Project, TPK
Electrical motor
20
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Troll A Pre-compression Project, TPK
EDS Module – ”The heart”
23
EDS module on Troll A
24
We made it!
Troll A
Picture from
25 September 2005