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The positive sequence voltage source is an ideal voltage source behind an internal series impedance. The parameter values for V, Rs, and Xs are in p.u.

Voltage Source parameters

Symbol

Description

Unit

IDSource namea unique name

Bus

Bus name (Bus ID)

a unique name

Voltage (pu)

Nominal voltage magnitude

p.u.

Angle (deg)

Voltage angle

Degree

Rs (pu)

Series resistance

p.u.

Xs (pu)

Series reactance

p.u.

...

No

Pin Description

Pin Type

Value/Unit

Instruction

1

Set/Get internal voltage magnitude of Vsource

I/O

p.u.

VsourceID/Vmag

2

Set/Get internal voltage angle of Vsource

I/O

Degree

VsourceID/Vang

3

Set/Get internal resistance and reac­tance of Vsource

I/O

p.u. (network base)

VsourceID/resistance

VsourceID/reactance

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Note: When dynamic simulation is set to Start from Power-flow in Simulation settings tab of the Solver, the voltage magnitude and angle of the internal ideal voltage source is recalculated to match with the power-flow results of the connected bus.

For the power-flow computations, the connected bus should be defined as a SLACK and the set-point voltage and magnitude of the bus is taken from the bus page (for Excel) or bus data record (for PSS/e).