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Digital Flickermeter

Implement digital flickermeter as described in IEC 61000-4-15 standard

  • Digital Flickermeter block

Simscape / Electrical / Specialized Power Systems / Sensors and Measurements


The Digital Flickermeter block implements a digital flickermeter as described in the IEC 61000-4-15 standard. The model implements the first four modules of the design. The statistical analysis (module 5) is implemented by an external function for offline analysis of recorded simulation signal.


You must have a Control System Toolbox™ license to use the Digital Flickermeter block.



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Set this input to 1 to enable the flicker measurement. The flickermeter is normally enabled after a given period of time, when the analyzed signal (input U) is stable.

Analyzed signal.


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Instantaneous flicker sensation measured for the analyzed signal.

This output contains these measurements:

  • Output 1: Half-cycle, rms-normalized voltage (pu)

  • Output 2: Weighted voltage fluctuation

  • Output 3: Square root of Output_5

  • Output 4: One-minute dose (integral) of instant perception

  • Output 5: Instantaneous flicker sensation (Output S5)

  • u: The analyzed signal

  • Init: initialization period time


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To edit block parameters interactively, use the Property Inspector. From the Simulink® Toolstrip, on the Simulation tab, in the Prepare gallery, select Property Inspector.

Opens the Statistical Analysis of Instantaneous Flicker Level module tool.

Frequency of the analyzed signal. Choose between 60 Hz and 50 Hz.

Nominal voltage value of the analyzed signal, in volts rms.

Maximum input voltage value of the input voltage adaptor (module 1), in per unit.

Maximum value of the instantaneous flicker sensation measured by the block, in per unit.

Sampling rate used to compute the instantaneous flicker sensation.

Scaling factor of the flickermeter for measuring the sensation perceptibility.


[1] Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 15: Flickermeter – Functional and design specifications.,IEC-61000-4-15, 2003-02.

[2] Gutierrez, J. J., J. Ruiz, A. Lazkano, and L. A. Leturiondo. “Measurement of Voltage Flicker: Application to Grid-connected Wind Turbines.” In Advances in Measurement Systems, edited by Milind Kr Sharma, 365–380. InTech, DOI: 10.5772/8731, 2010. Available from:

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Version History

Introduced in R2015b