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Covering all the bases - industrial power system design in a utility environment

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2 Author(s)
Durham, R.A. ; EDG Power Group Inc., Tulsa, OK, USA ; Durham, M.O.

The scheme discussed here is unique: a large electrical network is spread over a very large geographic area. This creates an exceptional set of circumstances. Construction specifications and techniques are used that increase the reliability of the system above standard utility practices. This adds to the cost of the project, and necessitates modified approaches to overhead line construction. Transformer selection and design is greatly influenced by the size of the load, as well as overhead pole construction. PF correction is accomplished using both standard distribution level capacitors, and using medium-voltage capacitors at the voltage terminals. Lightning protection uses both standard surge arrestors on the line, as well as advanced grounding systems. In each of these cases, standard utility construction techniques are combined with industrial design to meet the requirements of the system. Without the use of computer-based system modeling, proper design and operation of such a complex system would be impossible. Computer models give an accurate picture of the loading on the system in a particular configuration. They also aid the engineer in selection and coordination of protective devices, as well as power-factor correction. Conclusively, with the aid of modern tools, a system can be constructed that serves the needs of an industrial user in a utility environment.

Published in:

Industry Applications Magazine, IEEE  (Volume:9 ,  Issue: 6 )