May 2008
Intermediate to advanced
340 pages
9h 41m
English
When we speak of electricity, we think of current flowing through the conductors of overhead transmission lines and underground cables, on its way from generator to load. This approach is valid because the physical dimensions of the power system are generally small compared with the wavelength of the currents and voltages (the wavelength is 6000 km for 50 Hz; see also Appendix A.6 (Circuit Modeling)). This enables us to apply Kirchhoff's voltage and current laws and use lumped elements in our modeling of overhead transmission lines and underground cables.
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