TY - JOUR N2 - International standards from IEC and IEEE regulate power grid parameters such as theRMSvalue, 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. L1 - http://www.czasopisma.pan.pl/Content/124543/PDF/art02-01293_int.pdf L2 - http://www.czasopisma.pan.pl/Content/124543 PY - 2022 IS - No 3 EP - 468 DO - 10.24425/mms.2022.142270 KW - power quality KW - frequency estimation KW - non-integer Goertzel KW - frequency interpolation KW - embedded measurement systems A1 - Rodrigues, Nuno M. A1 - Janeiro, Fernando M. A1 - Ramos, Pedro M. PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 29 DA - 2022.09.30 T1 - Implementation of Goertzel-based frequency estimation for power quality monitoring in embedded measurement systems SP - 455 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/124543 T2 - Metrology and Measurement Systems ER -