Transcript 2010 Generation Division Power Point template

Energy Intensive User Group
Generation Maintenance Update
L. Reddy
Date: 8th May 2012
2020/04/25
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Generation Maintenance Index
Shutdown maintenance
parameters remain below par
performance and remains an
area of concern
Reliability Basis Updates
2020/04/25
Lag in planned
maintenance reflects lower
risk-deferred maintenance
Planned Maintenance Compliance
Work execution is
tracking planned work
closely – ensuring as
much that can be
done is done
Schedule Compliance
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Shutdown Maintenance: Plan vs Actual
More than 8000MW
on maintenance over
Dec-Jan festive
period
10 000
(6 month historic view)
Planned Maintenance
Actual Maintenance
8 000
6 000
4 000
•
•
•
30.апр
23.апр
16.апр
09.апр
02.апр
26.мар
19.мар
12.мар
05.мар
27.фев
20.фев
13.фев
06.фев
30.янв
23.янв
16.янв
02.янв
26.дек
19.дек
12.дек
05.дек
28.ноя
21.ноя
14.ноя
07.ноя
0
09.янв
Average capacity on maintenance
exceeded 5000 MW for period
2 000
Actual maintenance approximated 90% of the planned outage requirement
Outages scheduled on priority to minimise safety, legal and environmental compliance, to
minimise plant damage and then to manage plant reliability – outage scope maximised
within available shutdown time;
Deferred outages tracked and monitored for continuing risk – prioritisation elevated if risk
increases or if capacity allows
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c2012-13 Maintenance Challenge
12 MONTH MAINTENANCE REQUIREMENTS
MW
10000
Unoptimised
planned
maintenance
requirement
8000
6000
4000
2000
0
26 мар
23 апр
21 май
18 июн
Maintenance required
16 июл
13 авг
10 сен
08 окт
05 ноя
Capacity available for maint (incl gas)
03 дек
31 дек
28 янв
25 фев
25 мар
Capacity available for maint (excl gas)
The planned outage requirements exceed the capacity available for maintenance and so
liquid-fuel open cycle gas turbine usage and demand-side management become critical.
Planned outages are ranked on scope and risk, to enable prioritisation of outages within
the available capacity. Lower risk outages (inspections and interim repairs) have had to
make way for high-risk, high-pressure pipe-work replacements, low-pressure turbine
blade inspections and major refurbishment outages. All “deferred” outages are monitored
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for risk until they can be accommodated.
Shutdown Maintenance Summary
• Capacity continues to be constrained necessitating optimised scheduling of outages
within available capacity allowance
• Risk-based ranking continues as basis to prioritise outage schedule. Resource
constraints becoming an important consideration
• Increased focus on operational risk reduction – spares availability and turnaround, coal
quality outside of contract specification, quality of workmanship during shutdown
maintenance
• Focus on quality of outage planning and execution (“Pit-stop” vision – quality, effective
and efficient)
• Today 8% of generating capacity on shutdown maintenance (incl. Koeberg)
• For the first time up to two (2) large capacity unit outages will be run through this winter.
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