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Title: Implementation of Goertzel Based Frequency Estimation for Power Quality Monitoring in Embedded Measurement Systems
Authors: Rodrigues, Nuno M.
Janeiro, Fernando M.
Ramos, Pedro M.
Keywords: power quality
frequency estimation
non-integer Goertzel
frequency interpolation
embedded measurement systems
Issue Date: 30-Sep-2022
Publisher: Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation
Abstract: International standards from IEC and IEEE regulate power grid parameters such as the RMS value, frequency, harmonic and interharmonic distortion, unbalance or the presence of transients, that are important to assure the quality of distributed power. Standard IEC 61000-4-30 suggests the zero crossing algorithm for the measurement of the power grid frequency, but also states that different algorithms can be used. This paper proposes a new algorithm, the Fractional Interpolated Discrete Fourier Transform, FracIpDFT, to estimate the power grid frequency, suitable for implementation in resource limited embedded measurement systems. It is based on the non-integer Goertzel algorithm followed by interpolation at non-integer multiples of the DFT frequency resolution. The proposed algorithm is validated and its performance compared with other algorithms through numerical simulations. Implementation details of the FracIpDFT in an ARM Cortex M4 processor are presented along with frequency measurement results performed with the proposed algorithm in the developed system.
ISSN: 0860-8229
Type: article
Appears in Collections:CEM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
DEM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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