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1. A lightning stroke will cause a "fast-transient" overvoltage on the system. This overvoltage will travell through the system at near the speed of light, destroying anything unprotected in its path - similar to a tidal wave. 2. A strong source is a source with a very small...

Response to Steve A (Visitor): Actually, EMTDC and EMTP were born of the same concept introduced by Hermann W. Dommel in a paper called "Digital Computer Solution of Electromagnetic Transients in Single and Multiphase Networks", released in (I believe) 1969. Although similar, EMTP...

I find... "Power System Analysis" by John J. Grainger and William D. Stevenson, Jr. (1994 McGraw-Hill, Inc. ...to be an excellent starter text.

In response to comment by jbartos on Dec. 22: Actually, the PSCAD/EMTDC simulation of the transient response of electric machines is quite accurate. The syncronous machine model contains a 'Multi-Mass' algorithm to accurately simulate rotor torsional effects and sub-syncronous resonance. In my...