March 2024
Intermediate to advanced
480 pages
13h 35m
English
book
Electric Power Distribution Engineering, 4th Edition
by Turan Gönen, Chee-Wooi Ten, Ali Mehrizi-Sani
Content preview from Electric Power Distribution Engineering, 4th Edition
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C The per-Unit System
C.1 Introduction
Due to the various benefits involved, it is customary in power system analysis calculations to use per-unit values for impedances, currents, voltages, and powers. Per-unit values are scaled or normalized values that allow for easier comparison, as they eliminate the need to work with physical values in ohms, amperes, kV, and megavoltamperes (or megavars, or megawatts).
A per-unit system provides a convenient way to express quantities. In this system, the per-unit value of any quantity is defined as the ratio of that quantity to an arbitrarily chosen base (or reference) value with the same dimensions. As a result, the per-unit value of any quantity can be described as a dimensionless ...
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