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I modeled a single machine infinite bus (SMIB) network with the following data:

Sb = 100 MVA f = 60 Hz P = 1 pu Pf = 0.95 Xl1 = j0.2 pu (transmission line 1 reactance) Xl2 = jo.3 pu (transmission line 2 reactance) Generator X'd = 0.3 pu

I added two buses, two lines and two generators. Bus 1 consisted of generator whose Pgen was set to 1 MW, Qmax=Qmin was set to 0.328 Mvar based on pf=0.95, and X Source set to 0.3. To model an infinite bus, I set the type code of bus 2 to 3 (swing) with generator X Source (pu) set to 99999. For transmission lines, pu reactances were added as Line X (pu).

I was interested in the bus 1 Voltage (pu) and Angle (degree). The results I got in PSS/E were: Voltage (pu) = 1.0004 Angle (degree) = 0.07

However, the results I got by hand calculations were different: Voltage (pu) = 1.213 Angle (degree) = 20.25

Where did I make the mistake? 1. Did I model the infinite bus incorrectly? 2. Did I add transient reactance X'd incorrectly? 3. Or any other mistake?

Any help will be highly appreciated. Thanks.

I modeled a single machine infinite bus (SMIB) network with the following data:

Sb = 100 MVA f = 60 Hz P = 1 pu Pf = 0.95 Xl1 = j0.2 pu (transmission line 1 reactance) Xl2 = jo.3 pu (transmission line 2 reactance) Generator X'd = 0.3 pu

I added two buses, two lines and two generators. Bus 1 consisted of generator whose Pgen was set to 1 MW, Qmax=Qmin was set to 0.328 Mvar based on pf=0.95, and X Source set to 0.3. To model an infinite bus, I set the type code of bus 2 to 3 (swing) with generator X Source (pu) set to 99999. For transmission lines, pu reactances were added as Line X (pu).

I was interested in the bus 1 Voltage (pu) and Angle (degree). The results I got in PSS/E were: Voltage (pu) = 1.0004 Angle (degree) = 0.07

However, the results I got by hand calculations were different: Voltage (pu) = 1.213 Angle (degree) = 20.25

Where did I make the mistake? 1.

1. Did I model the infinite bus incorrectly? 2. incorrectly?
2. Did I add transient reactance X'd incorrectly? 3. incorrectly?
3. Or any other mistake?

Any help will be highly appreciated. Thanks.

I modeled a single machine infinite bus (SMIB) network with the following data:

Sb = 100 MVA MVA; f = 60 Hz Hz; P = 1 pu pu; Pf = 0.95 0.95; Xl1 = j0.2 pu (transmission line 1 reactance) reactance); Xl2 = jo.3 pu (transmission line 2 reactance) reactance); Generator X'd = 0.3 pupu;

I added two buses, two lines and two generators. Bus 1 consisted of generator whose Pgen was set to 1 MW, Qmax=Qmin was set to 0.328 Mvar based on pf=0.95, and X Source set to 0.3. To model an infinite bus, I set the type code of bus 2 to 3 (swing) with generator X Source (pu) set to 99999. For transmission lines, pu reactances were added as Line X (pu).

I was interested in the bus 1 Voltage (pu) and Angle (degree). The results I got in PSS/E were: Voltage (pu) = 1.0004 Angle (degree) = 0.07

However, the results I got by hand calculations were different: Voltage (pu) = 1.213 Angle (degree) = 20.25

Where did I make the mistake?

1. Did I model the infinite bus incorrectly?
2. Did I add transient reactance X'd incorrectly?
3. Or any other mistake?

Any help will be highly appreciated. Thanks.