Congestion
Capacity you already own goes unused
Conservative ratings bind transfers well before conductors approach their temperature limit, raising congestion costs and delaying interconnections.
LineID™ · PMU-based dynamic line rating
See the real capacity of every transmission line.
LineID turns the synchrophasor data your utility already collects into live line parameters, conductor temperature, and a dynamic line rating set by the segment that actually limits the circuit.
Input
Existing PMUs at both line terminals
Recovered
R · L · C · Tc
Spatial
Temperature of every route segment
Rating
Limiting-segment DLR, updated continuously
The problem
Static ratings assume the worst day of the year, every hour of the year.
Most lines are still operated to a fixed thermal limit. On a cool, windy afternoon that limit leaves transfer capacity unused. On a hot, still one it can be optimistic. Regulators now expect ratings that follow real conditions.
Regulation
Ratings must reflect conditions
FERC Order 881 requires ambient-adjusted ratings, and the Commission’s rulemaking on dynamic line ratings (RM24-6) looks further, to wind and solar conditions.
Instrumentation
Sensors on every span do not scale
Conductor-mounted devices measure one location each. Weather-only models never see the line itself. Utilities need both coverage and a measurement anchor.
How LineID works
How much power can your line safely carry right now?
LineID answers that with software alone, using measurements your utility already takes. Nothing new goes on the towers.
Listen
Meters at both ends of the line already record the electricity passing through it.
Take its temperature
By comparing the two ends, LineID works out how hot the wire is.
Find the hot spot
Adding local weather shows which stretch of the line runs hottest.
Set the limit
Operators see how much power the line can safely carry, updated around the clock.
White paper
LineID in two pages.
A plain-language overview of how LineID finds the real temperature and the safe limit of a transmission line, and what we learned on an OG&E line.
- Why fixed line limits leave capacity unused
- How the wire becomes its own thermometer
- Finding the hot spot and setting the safe limit
- What a pilot needs from your utility
PDF · 2 pages · 270 KB
One current, many temperatures
Why the limiting segment matters.
The same current flows through every segment of a line, but each segment sees different sun, air temperature, and wind. Wind crossing a conductor cools it far better than wind blowing along it, so a bend in the route can change the temperature.
- The PMU reference anchors the line’s thermal state in measurement.
- Route weather and orientation show where conditions differ.
- The segment with the lowest allowable current sets the rating.
Field study
Mathewson–Tatonga 345 kV, an OG&E line.
Warmer sections at the southeastern end and on a short diagonal section run closer to the wind direction; the east–west sections see more crosswind and run cooler.
Applications
One data stream, several operating decisions.
The same parameter and temperature stream supports real-time rating, asset health, and field planning.
Dynamic line rating
A continuously updated limiting-segment rating for transmission operations and congestion management, with the controlling location identified.
Demonstrated on field dataAsset health monitoring
Resistance trends at comparable loading and temperature point to deteriorating splices and hot joints before they fail.
Available from the parameter streamSensor placement and field review
Recurring warm segments show where a small number of conductor sensors or clearance checks give the most information.
Available from the segment mapForecast ratings
Weather forecasts and the anticipated load profile, started from the latest PMU-anchored state, extend the rating over an operating horizon.
In developmentWork with us
Try out LineID on one of your lines.
A pilot needs historical or streaming PMU data from both ends of a line, the conductor type, and the route. We return line parameters, segment temperatures, and a limiting-segment rating for your engineers to review.
- info@topolonet.com
- Phone
- (858) 605-9302
- Office
- 11440 West Bernardo Court, Suite 300
San Diego, CA 92127 - Topolonet Corporation