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Analysis of the Practical Implementation of Flicker Measurement Coprocessor for AMI Meters

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  • Krzysztof Kołek

    (Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH–University of Science and Technology, 30-059 Krakow, Poland)

  • Andrzej Firlit

    (Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH–University of Science and Technology, 30-059 Krakow, Poland)

  • Krzysztof Piątek

    (Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH–University of Science and Technology, 30-059 Krakow, Poland)

  • Krzysztof Chmielowiec

    (Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH–University of Science and Technology, 30-059 Krakow, Poland)

Abstract

Monitoring power quality (PQ) indicators is an important part of modern power grids’ maintenance. Among different PQ indicators, flicker severity coefficients P st and P lt are measures of voltage fluctuations. In state-of-the-art PQ measuring devices, the flicker measurement channel is usually implemented as a dedicated processor subsystem. Implementation of the IEC 61000-4-15 compliant flicker measurement algorithm requires a significant amount of computational power. In typical PQ analysers, the flicker measurement is usually implemented as a part of the meter’s algorithm performed by the main processor. This paper considers the implementation of the flicker measurement as an FPGA module to offload the processor subsystem or operate as an IP core in FPGA-based system-on-chip units. The measurement algorithm is developed and validated as a Simulink diagram, which is then converted to a fixed-point representation. Parts of the diagram are applied for automatic VHDL code generation, and the classifier block is implemented as a local soft-processor system. A simple eight-bit processor operates within the flicker measurement coprocessor and performs statistical operations. Finally, an IP module is created that can be considered as a flicker coprocessor module. When using the coprocessor, the main processor’s only role is to trigger the coprocessor and read the results, while the coprocessor independently calculates the flicker coefficients.

Suggested Citation

  • Krzysztof Kołek & Andrzej Firlit & Krzysztof Piątek & Krzysztof Chmielowiec, 2021. "Analysis of the Practical Implementation of Flicker Measurement Coprocessor for AMI Meters," Energies, MDPI, vol. 14(6), pages 1-17, March.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:6:p:1589-:d:516193
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    References listed on IDEAS

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    1. Haitao Gao & Peng Xu & Jin Tao & Shihui Huang & Rugang Wang & Quan Zhou, 2020. "Voltage Flicker Detection Based on Probability Resampling," Energies, MDPI, vol. 13(13), pages 1-12, June.
    2. David Lumbreras & Eduardo Gálvez & Alfonso Collado & Jordi Zaragoza, 2020. "Trends in Power Quality, Harmonic Mitigation and Standards for Light and Heavy Industries: A Review," Energies, MDPI, vol. 13(21), pages 1-24, November.
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