Enable subnetworks

Subnetworks are well-defined areas of connectivity in your database that either originate or terminate to a known set of features called subnetworks controllers. In an electric system, subnetworks are used to model the connectivity. Because they exist as features in your database, they can be used to organize, manage, and analyze your data. In this workflow, you will define subnetwork controllers, assign terminals, and create subnetworks.

Set subnetwork controllers

Subnetwork controllers define the origin or destination of a subnetwork. They are used in subnetwork management and specify how a resource flows through a network. Subnetwork controllers require terminals and are an important part of the utility network.

Set the transmission system subnetwork controller

In the workflow data, one of the subnetwork controllers for the transmission tier are the power transformers. You will set this subnetwork controller, which will later be used to create the subnetwork. To set the subnetwork controller, complete the following steps:

1. If necessary, open the Electric Transmission Network Asset Type map.
2. On the Map tab, in the Selection group, click Select by Attributes.
3. For Input Rows, choose Electric Transmission Device / Power Transformer.
4. Under Expression, build the following expression: Where Asset ID is equal to HV-XFR-334.
5. Click OK.

   The power transformer is selected on the map.

6. On the Utility Network tab, in the Subnetwork group, choose Modify Controller.

   The Modify Subnetwork Controller pane appears.

7. In the Modify Subnetwork Controller pane, click Add Selected , and then set the following parameters:
   1. For Terminal, choose 2wXFR:Secondary.
   2. For Tier, choose Transmission.
   3. For Subnetwork Controller Name, type HV-XFR-334.
   4. For Subnetwork Name, type 765kV.
   5. For Description, type The trasnformer for the 765kV subnetwork.
8. Click Apply.
9. On the Utility Network tab, in the Network Topology group, click Validate .

   Note:

   For your convenience, a .csv file called SubnetworkControllers.csv has been included in the SourceData directory. The remaining subnetwork controllers can be imported with the .csv file using the Import Subnetwork Controllers geoprocessing tool.

10. On the Edit tab, in the Manage Edits group, click Save .

Create subnetworks

When a subnetwork is updated, information in the Subnetworks table, attributes on features, and objects are updated, and a subnetwork line in the SubnetLine feature class can be created or updated.

To calculate the subnetwork values, complete the following steps:

1. If necessary, open the Electric Transmission Network Asset Type map.
2. In the Geoprocessing pane, click Toolboxes, expand System, and expand Utility Network Tools, and then click the Update Subnetwork tool.
3. In the tool, set the following parameters:
   1. For Utility Network, click the drop-down arrow and choose Network Utility Network.
   2. For Domain Network, choose Transmission.
   3. For Tier, choose Transmission.
   4. For All Subnetworks in Tier, check the check box.
   5. For Continue on Failure, leave the check box unchecked.
4. Click Run.

After running the tool, the subnetwork fields are populated with values of the subnetworks that they participate in. If a field shows Unknown, it could indicate that there is an issue in that area.

This tutorial provided a detailed and structured approach to migrating geometric network data into the utility network using the Electric Utility Network Foundation. By following the steps outlined in each section, you successfully navigated the data migration process, from preparing the project and data mapping to resolving network errors and creating subnetworks. You can apply the knowledge gained from this tutorial to migrate your own data to the utility network, ensuring a smooth transition.