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Electronics/How to size an electronic circuit?

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Question
I have to size a circuit with a 230V AC, 400 Hz, 500 KVA generator, a three-windings transformer and a 12-pulse parallel rectifier, and the rectified output will be 270V DC. I've created the schematic of this TRU (Transformer-Rectifier Unit) in SIMULINK  but I need to size devices.
How can I define the values of resistance and inductance of generator and transformer? and how can I understand from a thyristor's datasheet the value of its internal resistence Ron?
Thank you so much!

Answer
Using ohms law you can determine voltage drops and currents for finding average power dissipations in the component parts.  Some of it may be 'best guess' since the wave forms are not sinusoidal.  

This tutorial may help you learn more about the action and characteristics of various thyristors.

http://www.littelfuse.com/~/media/Electronics_Technical/Application_Notes/Switch

May you have true success with your project.  

Electronics

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Expertise

Electronics questions about AC, DC and digital theory.

Experience

Graduate electrical engineer with over 40 years in electronic design, manufacturing, project organization and patent review. Experience in fields of industrial and consumer electronics (audio, video, acoustics, etc.)

Organizations
IEEE (Institute of Electrical and Electronics Engineers); Senior Life member AES (Audio Engineering Society), Fellow Life member

Education/Credentials
BSEE University of North Dakota

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