Three-Phase V-I Measurement
Measure three-phase currents and voltages in circuit
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Simscape / Electrical / Specialized Power Systems / Sensors and Measurements
Description
The Three-Phase V-I Measurement block is used to measure instantaneous three-phase voltages and currents in a circuit. When connected in series with three-phase elements, it returns the three phase-to-ground or phase-to-phase peak voltages and currents.
The block can output the voltages and currents in per unit (pu) values or in volts and amperes.
If you choose to measure phase-to-ground voltages in per unit, the block converts the measured voltages based on peak value of nominal phase-to-ground voltage:
where
If you choose to measure phase-to-phase voltages in per unit, the block converts the measured voltages based on peak value of nominal phase-to-phase voltage:
where
If you choose to measure currents in per unit, the block converts the measured currents based on the peak value of the nominal current:
where
Vnom and Pbase are specified in the Three-Phase V-I Measurement block dialog box.
The steady-state voltage and current phasors measured by the Three-Phase V-I Measurement block can be obtained from the Powergui block by selecting Steady-State Voltages and Currents. The phasor magnitudes displayed in the Powergui stay in peak or RMS values even if the output signals are converted to pu.