I may be taking a class in protective relaying soon, and need to get a jump on the math since I'm no engineer. The attached link shows Fortesque's theory in matrix form on page(s) 2 and 3. If anyone has the time, could they do a calculation using imaginary voltages? I am beginning to understand the "a" operator, but maybe if someone were to write out a complete calculation using TEX, I would grasp it easier. (I tried TEX, and haven't got it yet.) I do understand the concept of positive, negative and zero sequences, I just can't seem to put it together in any coherent fashion. (The equation doesn't have to follow the matrix method, It might be easier to calculate individual phases like the middle of page three.) I guess I don't understand the process or the goal. Thanks a LOT, this will be a lot of work. Mike

http://www.ece.umd.edu/class/enee474.F2003/PDF%20Files/chp10_1.pdf

http://www.ece.umd.edu/class/enee474.F2003/PDF%20Files/chp10_1.pdf

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