Voltage Source (Three-Phase)

The output voltage is determined by the following equations:

where

— amplitude phase voltage;

, , — appropriate phase voltages;

— frequency;

— phase shift;

— the time.

In the case of a three-phase voltage source with additional harmonics, the output voltage is determined by the following equations:

where

— a string vector containing the amplitude voltages of the fundamental and higher harmonics;

— RMS line voltage;

— vector is a string of harmonic coefficients. The first element is equal to 1, which corresponds to the fundamental harmonic;

— vector is a string of harmonic numbers. The first element is equal to 1, which corresponds to the fundamental harmonic;

, , — appropriate phase voltages;

— vector column of harmonic frequencies. The first element is the fundamental frequency;

— vector column of phase shifts of harmonics. The first element is the phase shift of the fundamental harmonic;

— vector column of harmonic phase shifts. The first element is 120°

— the time.

When selecting a value X/R Ratio for the parameter Source impedance the equations for the source impedance will be as follows:

where

— the specified short-circuit power level;

— the specified X/R source ratio;

— the calculated resistance of the source;

— the calculated reactance of the source;

— the calculated inductance of the source.

Use the parameter group Initial Targets to set the priority and initial target values for the block parameter variables before modeling. For more information, see Configuring physical blocks using target values.