Lightning Density in Mid- South Synergy Service Territory

Transcription

1 Lightning Density in Mid- South Synergy Service Territory Comfort Manyame, PhD, GISP Daniel Bethapudi Kerry K Kelton, PE Mid-South Synergy Electric Coop, Navasota, TX

2 Introduction Mid-South Synergy (MS) serves ~2000 customers ~00 miles of line ~00 sq mile territory Si-county service territory

3 Fig. 1 Mid-South Synergy, Navasota, Teas Dallas Houston Mid-South Service Territory Miles

4 Mid-South Synergy GISevolution Converted from CAD to ArcGIS in 2007 GIS Interfaces with CIS, Staking, & Engineering Analysis software Current MS GIS Applications: Facilities management EA model production and validation Vegetation management Research : Lightning Strike Analysis

5 Rationale There are more than 20 million cloud to ground lightning strikes in the USA/yr Teas ranks high in lightning related fatalities More than 00 power outages in MS service area over a 3 yr period % of outages are lightning related

6 Objectives Spatially represent: lightning strikes Outage events in MS service territory Incorporate the lightning density results into the construction work flow for better decision making

7 Data and methods US Lightning Detection Network data Time, amplitude, location, polarity, and multiplicity of a strike MS 3 yr outage data ArcGIS (9.2) Spatial and Geo-statistical Analyst etensions

8 Results Cloud to Ground lightning strikes ( ) 90% negative lightning strikes Highest negative amplitude was 20 ka and 836 ka positive lightning Average stroke duration was ~ 0 msec

9 Results Fig. 2: Power outages Fig. 3: Power outage density Fig. 4: Lightning stroke density Fig. 5: Lightning strike density trends Fig. 6: Outage/Lightning stroke density Fig. 7: Scatter Plot Matri Fig. 8: Lightning stroke density (B) Fig. 9: Lightning contour map

10 Results Lightning-related outages dominate MS territory (Fig. 2) East West and North South trends in lightning strike density (Fig.5) Fig. 7 and 7b show a weak positive correlation between outages and lightning stroke density (R 2 =0.03)

11 Outages Cause Animal Tree outside ROW Tree inside ROW Lightning Fire Equipment Failure Mid-South Service Territory Power Outages In Mid-South Synergy Territory Miles Fig. 2

12 Fig. 3 Outage Density in Mid-South Synergy Territory NORTH ZULCH BNORTH ZULCH A BISHOP CINCINNATI BEDIAS MT ZION KEITHBKEITHA CARLOS ROANS PRAIRIE Outage Density Substation Mid-South Service Territory NAVASOTA DOBBIN LAKE FOREST WOODHAVEN FISH CREEK Miles

13 Fig. 4 Lightning Stroke Density in Mid-South Synergy Territory Mid-South Service Territory Stroke/Mile2/Year High : 83 Low : Miles

14 Fig. 5 Trend Analysis Y X Data Source: Strike Density Attribute: GRID_CODE

15 Fig. 6 Outages and Lightning Stroke Density in Mid-South Synergy Territory NORTH ZULCH BNORTH ZULCH A BISHOP CINCINNATI BEDIAS MT ZION KEITHBKEITHA CARLOS ROANS PRAIRIE Outage Density Stroke/Mile2/Year High : 83 Low : 14 Substation Mid-South Service Territory NAVASOTA DOBBIN LAKE FOREST WOODHAVEN FISH CREEK Miles

16 Fig. 7 Outage Density Vs Lightning Density Outages Lightning Stroke Density (stroke/mil2/yr)

17 Fig. 7b Outage and Lightning Stroke Density Outage Density y = R 2 = Lightning Stroke Density

18 Fig. 8 Lightning Stroke Density in Mid-South Synergy Territory NORTH ZULCH BNORTH ZULCH A BISHOP CINCINNATI BEDIAS MT ZION KEITHBKEITHA CARLOS ROANS PRAIRIE Substation Mid-South Primary Lines Mid-South Service Territory Stroke/Mile2/Year High : 83 Low : 14 NAVASOTA DOBBIN LAKE FOREST WOODHAVEN FISH CREEK Miles

19 Fig. 9 KEITHBKEITHA CARLOS NORTH ZULCH BNORTH ZULCH A BEDIAS NAVASOTA ROANS PRAIRIE BISHOP DOBBIN MT ZION LAKE FOREST WOODHAVEN FISH CREEK CINCINNATI Lightning Strike Contours Substation Mid-South Service Territory Lightning Strike Density Contours Miles

20 Discussion and Conclusion Great tool to help non-gis professionals visualize geographic data Outage Locations Lightning Strike locations Lightning strike density regions incorporated into construction work flow

21 Questions?