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A computer-aided design tool for developing digital controllers and relays

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3 Author(s)
Sidhu, T.S. ; Dept. of Electr. Eng., Saskatchewan Univ., Sask., Canada ; Sachdev, M.S. ; Wood, H.C.

The design, development, and implementation of a computer-aided design (CAD) tool for developing digital controllers and relays are presented. The development includes modeling A/D converters, software, and the necessary logic. Procedures for modeling A/D converters and simulating the software are described. Application of the CAD tool is demonstrated by evaluating and comparing three different designs of a digital overcurrent relay. The designs are evaluated to determine both the speed and accuracy of the relays. The effects of the size of the A/D converters, the word-size used in computations, and the truncation/rounding are included in the simulation. Also described is the algorithm used in the relay design

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Industry Applications, IEEE Transactions on  (Volume:28 ,  Issue: 6 )