SOME TERMS AND DEFINITIONS
An electrical power system is formed by generators, transmission lines and the loads supplied by the distribution system. In the example of Figure 1, just to show the relationship between each part, we show a generator that produces a rms voltage of V . The impedance of the system is Ω (reactance 1 Ω plus resistance 1 Ω). So, dividing the voltage by the impedance we would have an electrical current of 1 A.
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An electrical power system 
Contributor: Sergio Feitoza Costa
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