E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona 12-15 May 2003 1 Successful implemented Condition Based Maintenance for switchgear.

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Presentation transcript:

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Successful implemented Condition Based Maintenance for switchgear Presenter: E.R.S. Groot Session No 1, Paper No 14 Edwin R.S. GROOT Nuon InfraCore Edward GULSKI Delft University Abe van DAM Eneco Netbeheer Frank J. WESTER Nuon InfraCore The Netherlands

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May A guided tour through the implementation process of CBM (step by step) based on questions and problems we dealed with

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Where did we start?? (more then 60 different type of switchgear) Based on the selection criteria: Current maintenance costs Current outage time for maintenance Risk for maintenance induced failures Population size Age and expected lifetime Current failure behaviour and frequency …….we started with a minimum oil breaker

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May What are critical components of this switchgear ?? We applied an FMECA approach and weighted each component Failure frequency (score 0,1,2) Impact of failure on energy supply (score 1,2,3) Corrective costs (score 1,2,3) Environmental impact (score 1,2)

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May FMECA register (screen dump)

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May The outcome of the FMECA exercise resulted in a new optimised maintenance program ….. A mixture of maintenance, inspections and measurement activities were focused on critical components only This optimised maintenance program resulted in the first cost reduction of 29%

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May How do we: - control and update the new maintenance program in the field - support the electrician with actual norms and instructions - guaranty the continuation of feed back of field experience

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Therefore we developed the Inspector software tool:

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Field support with actual norms and instructions

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May How do we handle the increased amount of data like: Measurement results Inspection results Maintenance information Failure information

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May We developed the I-Core database type time analysis

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May The I-Core database for: storage of data (measurement and inspection results, failure information etc) optimising norms and criteria research of aging mechanisms improvement and optimisation of the condition based maintenance program

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Example: correlation between moisture level in oil and aging of coqolite

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Example: norm and criteria optimisation Probability density curve of switching velocity Correlation between contact pressure and velocity Norm definition for velocity based on large population measured data Define a maximum norm for contactpressure based on influence on velocity

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May The outcome of the data analyses resulted in a further optimised maintenance program ….. The optimisation of both the mixture of maintenance and measurement activities and frequency resulted in a total cost reduction of 35%

E.R.S. Groot, The Netherlands, Session 1, Block 1.1: SWITCHGEAR Barcelona May Conclusion Good experiences with CBM Still implemented it succesfully for other type of switchgear Growing importance for condition data (not only as a foundation for CBM)