Fast train catenary system design?

Question

calculation, design critical points and technical explination about the calculations

Answer 1

You make this sound like it is a 10-minute job.

You must first define the physical plant that you will be working with.  What kind of power do you have available?  Do you have ultimate flexibility for power frequency?  What standards will the rail be kept to?  How fast is "fast"?

Obviously, you would like to use as high a voltage as practical, as you will need to support power units on the order of 10,000,000 Watts.  Too low a voltage, and you will not be able to support the current draw on the pantograph.

Frequency is also a big issue.  The 15 or 25 Hz power that has been used in some installations totally insufficient for a high-speed train.  In order to keep P1 and P2 forces down, you need to use a light-weight main transformer.  This will necessitate nothing less than 50 Hz for your power plant.

How much weight will your rail system be able to support?  Do you have Cooper stress limits?  How much cant deficiency will you allow?  Will you use tilt-coaches or not?  What CG height will you try to limit your rolling stock to?  What gage of rail will you be able to utilize?  What about the terrain?  Lots of curves?  What will your limit on superelevation be?

I could go on, but it will only get worse from here...

Answer 2

Really , Life is that easy , i didn't know .... i took  15 weeks course just to know about the eleminaries of Railway Design .

If u c that it can be breifed in a single answer , then u r a great engineer