View capacity details for a geolocated line (Capacity)

Overview

Most of the transmission lines in the capacity scenario layers are point-to-point lines, meaning that they are represented on the map as a straight line distance from bus-to-bus (essentially, substation-to-substation).

If you have a transmission line that you've already located in one of the geolocated datasets (Rextag, EIA, OSM, etc.), you can typically find out the interconnection and capacity details of the line through the following process.

Confirm the voltage of the geolocated transmission line

From the project with the geolocated line, first check the voltage of the geolocated line.

For this example, we'll use this geolocated 115kV transmission line from the Rextag dataset. We want to see the capacity details for this target line. 

Identify the buses at either end of the transmission line

Get the bus numbers on either end of the geolocated line to make a later step easier. And then:

1. Go to Add Grid in the workflow sidebar > Substations > Choose source: From Layer.
2. Turn on the bus headroom capacity layer for your target scenario (e.g. Discharging Summer Peak).
3. Hone in on one end of the transmission line and draw a small polygon around the bus(es) at one end of the transmission line (use the Apply Boundary option to Draw Area on Map). 

This will display a table at the bottom of the project window showing the bus(es) at that end of the transmission line.

4. Scan through the table of buses and pick the buses that have the same voltage as the target line (e.g. Here we'll save the 115 kV buses since our transmission line is 115kV - which is Substation Bus Number 32408).

5. Check the box by the buses with matching voltages and click Add to Project. 

Repeat the steps above to save the bus(es) at the other end of the transmission line. 

Identify the point-to-point line (with capacity details)

1. Go to Add Grid in the workflow sidebar > Transmission Line > Choose source: From Layer.
2. Turn on the bus headroom capacity layer (which is a point-to-point representation of the line) for your target scenario (e.g. Discharging Summer Peak).
3. Use the Apply Boundary option to Draw Area on Map and trace a selection polygon around the starting and ending buses to capture any lines in the area from the point-to-point layer.

This will display a table at the bottom of the project window showing the transmission line(s) in the area.

4. Scan through the table of transmission lines and review the voltage column to find the ones that match your to/from bus voltages and that have the same to/from bus numbers.
5. Scroll through the table to see interconnection details including headroom capacity, allocated costs etc.
6. Check the box by the transmission line that matches and click Add to Project.

In the future, you can always pull up the full interconnection and capacity details for the transmission line (or buses) by turning on the original layer via the layer catalog and clicking on the POI of interest.