GIS at Saint John Energy. Presented by: JP McGrath

Transcription

1 GIS at Saint John Energy Presented by: JP McGrath

2 The Business Saint John Energy is an electrical distribution utility providing service to approximately 36,000 residential, commercial and industrial customers. The Utility operates within the 350 square kilometers of the City of Saint John SJE has been an ESRI customer since 2002

3 The Electric System To service its customers, the company has the following infrastructure (As summarized from the GIS ) 13 Substations 22,614 Poles including both Wooden and Metal types 5,850 Pole mounted distribution transformers 1,200 Pad mounted and submersible distribution transformers 605 KM Primary Overhead Conductor 800 KM Secondary Overhead Conductor 155 KM Primary Underground Conductor 160 KM Secondary Underground Conductor

4 Software / Hardware In 2009 we migrated to version SP1 ArcFM Designer ArcFM GDB Replication and Mobile Designer ArcReader Currently we are in the process of migrating to ArcReader will be replaced with AGIS Server Web

5 Field Data Collection We began a new phase of data collection and updating because our users had little confidence in the data We had errors in the geometric network We were not consistent in the way we digitized facilities There was limited tracing on primary feeders There was limited tracing on secondary feeders The GIS could not answer the questions we were asking it

6 Overhead Inventory Field Audit Linemen were provided paper maps showing pole features They were asked to visit the poles and draw what they saw

7 Overhead Inventory Field Audit Linemen were also provided a paper attribute form They were asked to record the attributes of the facilities

8 Overhead Digitizing Goals To produce a legible map at a Scale of 1:1,000 or larger To establish drawing conventions so that the map has a consistent look regardless of the area being viewed

9 Digitizing Standards Pole Feature Poles are placed at their actual location by GPS or Aerial Photo A 5 ft. multi-ring buffer is generated around the pole features Attachments to the pole are added on the first 5 ft. ring Lights are on the field or road sides Transformers, power supplies and unmetered loads are left or right sides

10 Digitizing Standards Primary Primary conductor is always placed on the road side of the pole starting at the 10 ft. buffer ring For poles with multiple circuits, the top circuit is closest to the pole

11 Corners can get tricky To maintain our convention (top circuit closest to pole) the drawing has become complicated in spots

12 Digitizing Standards Secondary & Service Secondary conductor is always placed on the field side of the pole starting at the 10 ft. buffer ring Dead-ends are exaggerated to the 10 ft. buffer for clarity

13 Overhead System - Before The data provided by the linemen was used to re-digitize all network features

14 Overhead System - After The result is a cleaner network map that can be interpreted by all users

15 Geometric Network - Before Geometric errors existing in the network included Duplicated features, switch and fuse connections

16 Geometric Network - After Features were completely redrawn based on inventory System crashes were reduced significantly

17 Electric Network Tracing - Before Our goal was to enable tracing from the Switch Gear to the service point

18 Electric Network Tracing - After We can now trace from switch gear to electric meter for 82% of our customers

19 Relationships between business systems to take advantage of the connectivity are emerging GIS is now being used to support many projects GIS is now being used to support power restoration services Project Benefits

20 Overhead Inventory and Transformers During the overhead data collection, the linemen provided information on the location of TX and the Asset # if visible. Queries on the GIS show that a large number of TXs are mapped but do not have a record in TX Unit Table. Collecting information on these assets has become a priority project.

21 Aerial Transformer Audit Inspection forms were created for TXs without unit information Crews must visit each TX and complete an inspection

22 Data Driven Pages (DDP) From the ArcGIS Resource Center DDP is an automated mapping tool that allows a series of layout pages to be created for a single map document. A feature layer, or index layer, divides the map into sections based on each index feature in the layer and generates one page per index feature. The layouts can be exported to a number of different formats.

23 Data Driven Pages for Quick Audit Forms Create a feature class of facilities to audit Using spatial joins, add address information to file Create the audit form in ArcMap layout view Add DDP text to the layout including address etc. Create a mask feature class using page definition queries Create a multi-page map book using ArcMap export map tools

24 Underground Digitizing Goals To produce a legible map at a Scale of 1:500 or larger To establish drawing conventions so that the map has a consistent look regardless of the area being viewed

25 Standards Underground Point Features Underground point features are placed in their actual location by GPS or Aerial Photo. Features include pad mounted facilities and access points

26 Composite Favorites for Digitizing Composite favorites have been created for some underground features

27 Standards Underground Line Features Duct, poly pipe and direct bury trenches are placed in their actual locations by GPS when available Primary and secondary conductor are offset 3 ft. from conduit feature

28 Spatial vs. Network Accuracy The network features have a drawing convention that is similar to our one-line diagram.

29 Next Steps Complete the migration to Establish ArcGIS Server as client viewer Complete connectivity for all metered points Establish formal workflows for updates

30 Thank You.