Intermediate results from ongoing Cigré Enquiry
Use of Reliability Survey Data
Introduction:
Reliability data can be of great value and has numerous uses for utilikties. The two main areas reliability data can be usedfor are:
1. Network performance analysis
2. Asset (equipment) performance analysis
•Additionally, reliability survey can aid in the adoption of a more statistical approach to asset management (including helping system operators to devise better defect data collection schemes)
•Worldwide electrical networks are aging and the survey will help understand the impact and mitigate the effects through effective proper operation, effective maintenance, monitoring, asset refurbishment and asset replacement
Network Performance
By splitting the network into individual subcomponents, the network's overall performance can then be studied and modeled.
Typically studies would be:
- Network resilience and complexity – to look at the reliability of a network including the ability to take outages for repairs and construction work
- Substation design and layout – examining different
substation layouts and the need for redundancy
- Analysis of existing network to find and improve weak areas
- Predict future network reliability due to aging of equipment
- Design optimum network and substation layouts
The survey does not provide all the information needed and some of the data is dependent on the system operator (for example length of outage is dependent on spares coverage)
Asset (Equipment) Performance
Reliability data can be used to make important decisions over the equipment's whole life cycle including:
- Purchase and installation (Building)
- Operating
- Replacement/retirement
Revised 22-June-2008