1. On-line Condition Monitoring of Distribution Network Assets – Making the Network Smarter
Neil Davies
Neil Davies – UK – Session 1: Network Components – Paper 0980

2. Contents Factors affecting network reliability
The direct cost of failure
Condition Assessment of MV Assets
Smart Substation Monitoring
Conclusions
Neil Davies – UK – Session 1: Network Components – Paper 0980

3. Factors Affecting Network Reliability – Major Causes*
Switchgear partial discharge faults
Switchgear mechanical faults
Other switchgear faults (e.g. lightning, protection)
Cable faults
Theft Vandalism
*Ground Mounted Equipment
Neil Davies – UK – Session 1: Network Components – Paper 0980

4. Factors affecting Network Reliability – Costs*
*Ground Mounted Equipment
Neil Davies – UK – Session 1: Network Components – Paper 0980

5. Planned intervention or unplanned remedial action?
Neil Davies – UK – Session 1: Network Components – Paper 0980

6. Condition – the key factor in improving SAIDI and SAIFI
Restoration of unexpected failures is more costly and takes longer
Effective management of assets requires accurate knowledge of condition
Condition links good investment, operation and maintenance of networks
Improving network performance can have significant cost benefits
Neil Davies – UK – Session 1: Network Components – Paper 0980

7. Partial Discharge Monitoring
UltraTEV Monitor
Powerful WEB enabled hub PD monitor
Locate Transient Earth Voltage signals to resolution of 30cm
Locate ultrasonic activity
Locate Cable Discharge activity
Correlate discharge with environmental and network conditions
Neil Davies – UK – Session 1: Network Components – Paper 0980

8. Cable PD Monitoring from Substation
Determine magnitude and location of discharge
Correlate with switchgear discharge signals
Map PD signals along length of cable
Neil Davies – UK – Session 1: Network Components – Paper 0980

9. Substation Monitoring Approach
The UltraTEV Monitor Hub provides a web based gateway into substation
Additional condition and network parameters can be monitored
Limited additional cost
Improved business case for capital expenditure of condition monitoring
Single interface per substation
Neil Davies – UK – Session 1: Network Components – Paper 0980

10. Smart Substation Monitor
Partial Discharge - Switchgear
Power Quality
Environment
Circuit Breaker Trip Timing
Partial Discharge - Cables
Substation Monitor
Web
Fault Level
Protection Battery Condition
Security cameras and recording
Asset / Circuit Algorithms
System Voltage and Current
Neil Davies – UK – Session 1: Network Components – Paper 0980

11. Smarter Networks Need Condition Monitoring
Asset
Partial Discharge - Switchgear
Circuit Breaker Trip Timing
Protection Battery Condition
Security cameras and recording
Partial Discharge - Cables
Condition
Neil Davies – UK – Session 1: Network Components – Paper 0980

12. Smarter Networks Need Condition Monitoring
Asset
Condition
System Voltage and Current
Power Quality
Environment
Asset / Circuit Algorithms
Fault Level
System
Condition
Neil Davies – UK – Session 1: Network Components – Paper 0980

13. Smarter Networks Need Condition Monitoring
Asset
Premature
Ageing
Condition
Asset
Capability
System
Capacity
Smart
Substation
Monitor
Performance
Risk
Headroom
Capability
System
Change
System
Condition
Neil Davies – UK – Session 1: Network Components – Paper 0980
The Smart Grid of tomorrow will be built on the assets of yesterday

14. The Smart Grid of Tomorrow Will Be Built Upon the Assets of Yesterday
Smarter Networks Need Condition Monitoring
The Smart Grid of Tomorrow Will Be Built Upon the Assets of Yesterday
Neil Davies – UK – Session 1: Network Components – Paper 0980