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# Sensors and Measurements

Current, voltage, and impedance sensors, specialized measurement blocks

## Blocks

 Voltage Measurement Measure voltage in circuit Current Measurement Measure current in circuit Three-Phase V-I Measurement Measure three-phase currents and voltages in circuit Multimeter Measure voltages and currents specified in dialog boxes of SimPowerSystems blocks Impedance Measurement Measure impedance of circuit as function of frequency
 Fourier Perform Fourier analysis of signal Fundamental (PLL-Driven) Compute fundamental value of signal Mean Compute mean value of signal Mean (Phasor) Compute mean value of input phasor over a running window of one cycle of specified frequency Mean (Variable Frequency) Compute mean value of signal Positive-Sequence (PLL-Driven) Compute positive-sequence component of three-phase signal at fundamental frequency Power Compute active and reactive powers of voltage-current pair at fundamental frequency Power (3ph, Instantaneous) Compute three-phase instantaneous active and reactive powers Power (3ph, Phasor) Compute three-phase active and reactive powers using three-phase voltage and current phasors Power (PLL-Driven, Positive-Sequence) Compute positive-sequence active and reactive powers Power (Phasor) Compute active and reactive powers using voltage and current phasors Power (Positive-Sequence) Compute positive-sequence active and reactive powers Power (dq0, Instantaneous) Compute three-phase instantaneous active and reactive powers RMS Compute true root mean square (RMS) value of signal Sequence Analyzer Compute positive-, negative-, and zero-sequence components of three-phase signal Sequence Analyzer (Phasor) Compute sequence components (positive, negative, and zero) of three-phase phasor signal THD Compute total harmonic distortion (THD) of signal

## Functions

 power_fftscope Fourier analysis of simulation data signals power_ltiview Create state-space object of model for use with LTI Viewer tools power_zmeter Compute impedance versus frequency of Impedance Measurement blocks of model