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Life management of electrical plant: a distribution perspective

Life management of electrical plant: a distribution perspective

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The effective management of assets to ensure that the user obtains the optimum life for the plant is becoming more vital as electricity distribution systems are worked harder. Systems and equipment need to be reliable. The life management of plant is concerned with the life of the plant from preconception to final dismantlement (and recycling). In that journey the plant may encounter harsh operating and/or environmental conditions, which may test the limits of the original design. Figure 11.1 shows pictorially the whole operating lifecycle of plant from inception, design, test, commissioning and operating life to refurbishment. During the useful operating life, maintenance testing and monitoring perform an essential element for the user to decide whether refurbishment is an economic option to extend the life of the plant.

Chapter Contents:

  • 11.1 Introduction
  • 11.2 Reliability
  • 11.2.1 Sources of data
  • 11.2.2 Typical distribution company requirements for data
  • 11.2.3 Case studies using data
  • 11.2.4 The bath tub curve
  • 11.2.5 Practical example - distribution transformers
  • 11.2.6 Human factors in plant reliability
  • 11.2.7 Conclusions on reliability
  • 11.3 Condition monitoring
  • 11.3.1 Definitions
  • 11.3.2 Benefits of condition monitoring
  • 11.3.3 Application to equipment
  • 11.3.4 What condition monitoring information can tell us about asset management
  • 11.3.5 Condition assessment leading to asset replacement
  • 11.3.6 The new working environment - users' requirements
  • 11.3.7 Condition monitoring - the future
  • 11.4 Plant maintenance
  • 11.4.1 General techniques
  • 11.4.2 Enhanced maintenance
  • 11.4.3 Reliability-centred maintenance (RCM)
  • 11.4.4 Condition-based maintenance (CBM)
  • 11.5 Working plant harder
  • 11.5.1 Towards a risk-based strategy - the reasons why
  • 11.5.2 Risk assessment - FMEA and FMECA
  • 11.5.3 Working switchgear harder
  • 11.5.4 Working transformers harder
  • 11.6 Future trends in maintenance
  • 11.7 A holistic approach to substation condition assessment
  • 11.8 Retrofit, refurbish or replace?
  • 11.9 Current challenges
  • 11.10 A standard for asset management
  • 11.11 The impact of smart grids on asset management
  • 11.12 Information management
  • 11.13 Conclusions
  • References

Inspec keywords: condition monitoring; maintenance engineering; distribution networks; remaining life assessment; power system reliability

Other keywords: electricity distribution systems; monitoring; preconception; operating lifecycle; environmental conditions; final dismantlement; recycling; harsh operating conditions; refurbishment; electrical plant; maintenance testing; life management

Subjects: Reliability; Plant engineering, maintenance and safety; Distribution networks

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