1. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
Optimising Vegetation Management Using GIS
Ralph Coleman
2. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
Trees are the single largest threat
to UK electricity supplies.
The Problem
3. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
The Problem
4. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
The Problem
There has been
too much of this
5. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
“Global warming over the last century means heat extremes
that previously only occurred once every 1,000 days are
happening four to five times more often”
a study published in Nature Climate Change said.
The Problem
6. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
“Although no individual storm can be regarded as
exceptional, the clustering and persistence of the
storms is highly unusual”
Met Office speaking about storms in the last 5 years
The Problem
7. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
The following is a brief summary of the effects of the December 2013 storms:
• Over 6,900 faults occurred
• Damage was caused mainly by fallen trees and branches
• Over two million people lost their power supply
• 16,000 customers were left without electricity for more than 48 hours
• Additional costs to DNO’s was £39 million!
• Under Ofgem’s “Guaranteed Standards”, payments to customers totaled
over £7.5 million
• This could be up to £300 per customer for lost service.
The Problem
8. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
• Electricity Supply Quality and Continuity Regulations (ESQCR)
• These regulations state that it is the Electricity Distribution Network
Operators (DNO’s) duty “to keep sufficient distance between
vegetation and overhead lines both to safeguard public safety and
to ensure continuity of supply”
• Strict guidelines on maintaining distances – ENATS 43-8
Legislation
9. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
Traditional Approach
• Teams of surveyors walking the lines
• Average of 3 years to cover a network
• Vegetation grows – never have a complete picture
• The cutting then takes three years which is inefficient
and is likely to result in more ‘tree related outages’ and
therefore associated fines
10. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach
A new approach combining
spatial data and innovative
GIS processes in
revolutionising vegetation
management
11. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach
Data capture
and processing
Analysis Visualisation
12. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach
Aims
• Where is the encroachment at its worst?
• Accurate and informative results
• Risk based cutting plans
• Increased efficiency, reduced cost and better
customer experience
13. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Capture
14. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Capture
15. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Capture
16. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Capture
17. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Capture
• Rapid acquisition
• High specification instruments
• Reliable positional accuracy
• High point density (high detail)
• Wide area allowing entire network to be assessed
18. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
Software - ArcGIS
• Huge datasets requiring stable platforms
• Significant processing power
• Intuitive and robust analysis tools
• Compatibility for continuity
• Easy visualisation in 3D
19. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
Classification
• Conductors
• Towers/Poles
• Vegetation
• Other structures
20. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
Classification
• Conductors
• Towers/Poles
• Vegetation
• Other structures
21. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
Filtering
• Conductors
• Vegetation within 6m
22. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
23. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
Distances
• Points are attributed
and classified into risk
categories
24. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
Distances
• Attributed points
snapped to 2D lines in
segments
• Statistical analysis
undertaken to determine
risk category for each
conductor
25. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach - Analysis
26. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach – Visualisation
• Interactive 3D viewer
• Hosted / Streamed content
• Intuitive UI
• Ability to customise
• Multiplatform
27. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach – Visualisation
28. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach – Visualisation
29. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
New Approach – Visualisation
30. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
• Risk based work programme
• Prioritised tree cutting by the threat of
vegetation and the number of customers that
would be affected by a tree related outage
• Huge savings through intelligent planning
Outcomes
31. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
32. I n n o v a t i v e a n d a f f o r d a b l e G I S a n d e n v i r o n m e n t a l d a t a a t y o u r f i n g e r t i p s
• DNOs are under severe pressure from the
regulator
• Vegetation cutting plans need to be more
‘intelligent’
• Proactivity rather than reactivity
• A brighter future!
Conclusions
Editor's Notes
Ofgem keep a very close eye on this by closely monitoring the number of Customer Minutes Lost (CML’s) and Customer Interruptions (CI’s)
One of the electricity DNO’s recently informed us that in 2014, the cost of CML’s in relation to just the 11kV and 33kV network was £27.2m!. This cost would include the cost of clearing the trees, repairing the damage and any payments to customers for interruptions in their electricity supply.
Cutting like the forth bridge
Data captured in one season so there is a complete understanding of the current veg state across the network
So it will then be possible to produce a risk based work programme, which will ensure that all the tree cutting is prioritised by the threat of the vegetation and the number of customers that would be affected by a tree related outage.
Data captured in one season so there is a complete understanding of the current veg state across the network
So it will then be possible to produce a risk based work programme, which will ensure that all the tree cutting is prioritised by the threat of the vegetation and the number of customers that would be affected by a tree related outage.
Cutting like the forth bridge
Rapid acquisition of LiDAR and Aerial Photography of the entire area of operation from multiple aircraft
Rapid acquisition of LiDAR and Aerial Photography of the entire area of operation from multiple aircraft
Rapid acquisition of LiDAR and Aerial Photography of the entire area of operation from multiple aircraft