# Control and Measurements

Pulse generators, filters, signal transformation blocks

Generate pulses, transform, filter, analyze, and measure signals.

## Blocks

expand all

 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 Simscape Electrical Specialized Power Systems blocks Impedance Measurement Measure impedance of circuit as function of frequency
 Digital Flickermeter Implement digital flickermeter as described in IEC 61000-4-15 standard Fourier Perform Fourier analysis of signal Frequency (Phasor) Measure phasor signal frequency 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 PMU (PLL-Based, Positive-Sequence) Implements a phasor measurement unit using a phase-locked loop 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
 Overmodulation Add third harmonic or triplen harmonic zero-sequence signal to three-phase signal Pulse Generator (Thyristor) Generate pulses for twelve-pulse and six-pulse thyristor converters PWM Generator (2-Level) Generate pulses for PWM-controlled 2-level converter PWM Generator (3-Level) Generate pulses for PWM-controlled three-level converter PWM Generator (DC-DC) Generate pulse for PWM-controlled DC-DC converter PWM Generator (Interpolation) Carrier-based unipolar PWM generation with interpolation PWM Generator (Multilevel) Generate pulses for PWM-controlled modular multilevel converter PWM Generator (Pulse Averaging) Carrier-based PWM generator with pulse averaging Sawtooth Generator Generate sawtooth waveform at regular intervals Stair Generator Generate signal changing at specified transition times SVPWM Generator (2-Level) Generate pulses for SVPWM-controlled two-level converter SVPWM Generator (3-Level) Generate pulses for SVPWM-controlled three-level converter Three-Phase Programmable Generator Generate three-phase signal with programmable time variation of amplitude, phase, frequency, and harmonics Three-Phase Sine Generator Generate three-phase balanced signal, amplitude, phase, and frequency controlled by block inputs Triangle Generator Generate symmetrical triangle waveform at regular intervals
 Alpha-Beta-Zero to dq0, dq0 to Alpha-Beta-Zero Perform transformation from αβ0 stationary reference frame to dq0 rotating reference frame or the inverse abc to Alpha-Beta-Zero, Alpha-Beta-Zero to abc Perform transformation from three-phase (abc) signal to αβ0 stationary reference frame or the inverse abc to dq0, dq0 to abc Perform transformation from three-phase (abc) signal to dq0 rotating reference frame or the inverse
 First-Order Filter Implement first-order filter Lead-Lag Filter Implement first-order lead-lag filter Second-Order Filter Implement second-order filter Second-Order Filter (Variable-Tuned) Implement second-order variable-tuned filter
 PLL Determine frequency and fundamental component of signal phase angle PLL (3ph) Determine frequency and fundamental component of three-phase signal phase angle
 Bistable Implement prioritized S-R flip-flop (bistable multivibrator) Edge Detector Detect change in logical signal state Monostable Implement monostable flip-flop (one-shot multivibrator) On/Off Delay Implement switch-on or switch-off delay
 Sample and Hold Sample first input and hold its value based on value of second input Discrete Shift Register Implement serial-in, parallel-out shift register Discrete Variable Time Delay Delay signal by variable time value

## Functions

 `power_fftscope` Fourier analysis of simulation data signals `power_flicker` Perform statistical analysis of instantaneous flicker level signal `power_zmeter` Compute impedance versus frequency of Impedance Measurement blocks of model

## Topics

• Park Transformation

Express direct axis, quadratic axis, and zero-sequence components as phase quantities using Park transforms.

• Simulate Variable Speed Motor Control

Model and discretize simple motors with specialized blocks. Use the FFT Analysis tool of the Powergui block to perform harmonic analysis.