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In power flow analysis for a voltage-controlled bus, which of the following is the unknown quantity?

In power flow analysis for a voltage-controlled bus, which of the following is the unknown quantity? Correct Answer Reactive power

Bus types for power flow analysis are shown in the table given below:

Bus type

Specified variable

Unknown variables

Reference bus or slack bus

| Vi |, δi

Pi, Qi

Generator bus or voltage-controlled bus or PV bus

| Vi |, Pi

δi, Qi

Load bus or PQ bus

Pi, Qi

| Vi |, δi


Where | Vi | = Magnitude of the voltage

δi = Load angle

Pi = Active power

Qi = Reactive power

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