# What are important metrics of high voltage power lines? [closed]

Upfront: I am not an electrical engineer and therefore apologize upfront if I am asking a stupid question.

TLDR; What are important / relevant metrics of high voltage power lines that can be computed solely using the metrics in the list below.

For a project regarding high voltage power lines in Europe I am given the SciGrid dataset and would like to compute 'important' characteristics of all power lines, so that I can make statements about the importance of individual lines. Of course, i.e. the number of cables will give insight about the importance of a high voltage line.

I have no background in electrical engineering and am therefore completely lost; even though I have found slides that are very relevant (I guess) I am unable to make use of them correctly.

Question 1: Is it even possible to compute reasonable characteristics using the given numbers below? The dataset does not include the diameter of the wires.

Question 2: What would be important / relevant metrics of high voltage power lines?

The dataset contains solely the following information about each line:

• voltage
• number of cables
• number of wires
• frequency [Hz]
• length [m]
• resistance [ohm / km]
• reactance in [ohm / km]
• capacitance in [nF / km]
• maximum current thermal limit [A]

Any suggestions / recommendations would be greatly appreciated.

• How to ask a relevant question - note the bit about being vague and avoiding asking for opinions – Andy aka Jan 22 '18 at 12:10
• If you have no background in EE ... honestly I don't think an answer here can provide enough of that background. If you mostly understand those slides but have a specific questions about one, revise this question to focus on that. – Brian Drummond Jan 22 '18 at 12:18
• Current for one-phase and three-phase short-circuit comes to mind, because that's what is limiting the minimum cross section for long cables. You want the short-circuit current high enough to blow the fuses immediately. – Janka Jan 22 '18 at 13:37
• @Andyaka Yes, you are right. The problem is, that I have no idea what an important metric for a high voltage power lines is -- is it the capacitance, or the thermal limit? Of course, for knowledgeable people vague questions must be (at least) irritating. – Pethor Jan 22 '18 at 14:37
• @BrianDrummond thanks for your suggestion. I am unsure, whether those slides are helpful at all, or not. I am in general unsure what 'important' metrics of a high voltage power line are. – Pethor Jan 22 '18 at 14:42