PowerWorld Transmission Line Parameter Calculator Version 2
PowerWorld Transmission Line Parameter Calculator Version 2
PowerWorld Transmission Line Parameter Calculator Version 2
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<strong>Transmission</strong> <strong>Line</strong> <strong>Parameter</strong> <strong>Calculator</strong> <strong>Version</strong> 2<br />
3.4 Per Unit (PU) <strong>Parameter</strong>s<br />
Resistance, Inductive Reactance, Conductance, Susceptance<br />
R′<br />
X ′<br />
RPU<br />
=<br />
X<br />
PU<br />
=<br />
Z<br />
B<br />
Z<br />
B<br />
G<br />
Where:<br />
R PU Per unit resistance<br />
R’ Total series resistance in Ohms<br />
X PU Per unit Inductive reactance<br />
X’ Total series inductive reactance in Ohms<br />
X PU Per unit conductance<br />
G’ Total series conductance in Siemens<br />
B PU Per unit susceptance<br />
B’ Total series susceptance in Siemens<br />
Z B Impedance base in Ohms<br />
Admittance base in Siemens<br />
Y B<br />
PU<br />
G′<br />
=<br />
Y<br />
B<br />
B<br />
PU<br />
B′<br />
=<br />
Y<br />
B<br />
3.5 MVA To Ampere and Ampere To MVA Limits Conversion<br />
MVA to Ampere Limit Conversion<br />
Lim<br />
Where:<br />
Lim Amp Limit in Amperes<br />
Lim MVA Limit in MVAs<br />
V N Nominal voltage in Volts<br />
Amp<br />
=<br />
Lim<br />
MVA<br />
3V<br />
×10 6<br />
N<br />
Ampere to MVA Limit Conversion<br />
Where:<br />
Lim Amp Limit in Amperes<br />
Lim MVA Limit in MVAs<br />
V N Nominal voltage in Volts<br />
Lim = Lim<br />
MVA<br />
Amp<br />
3 N<br />
V<br />
6<br />
10<br />
4 References<br />
[1] J. D. Glover and M. S. Sarma, Power Systems analysis and design,<br />
Brooks/Cole, 3 rd edition, 2002.<br />
[2] A. R. Bergen and V. Vittal, Power System Analysis, Prentice Hall, 2 nd edition,<br />
2000.<br />
©<strong>PowerWorld</strong> Corporation<br />
17<br />
April 22, 2013
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