Publication

A synchrophasor estimator characterized by attenuated self-interference and robustness against DC offsets: The DCSOGI interpolated DFT

2027

Abstract

The second-order generalized integrator (SOGI), which can be used to attenuate the self-interference of the fundamental tone, is unable to fully reject DC offsets on the input signal. Consequently, the performance of any SOGI based synchrophasor estimation (SE) technique might be compromised in the presence of such DC components. The current work presents a SE algorithm which adopts an enhanced SOGI formulation, robust against DC, combined with a three-point IpDFT and a three nominal fundamental period Hanning observation window. Its simultaneous compliance with both phasor measurement unit (PMU) P and M performance classes is assessed by means of a simulated environment where all the operating conditions defined by the IEC/IEEE 60255-118-1:2018 standard are evaluated combined with a 10% static DC offset and under two different noise levels. Furthermore, the method adopts a dedicated mechanism for the detection of low amplitude 2 nd harmonic tones and the correction of their impacts under off-nominal frequency conditions. Finally, its resilience against multiple simultaneous harmonic interferences is also analyzed together with its performance in the presence of decaying DC components.

Official source

https://infoscience.epfl.ch/entities/publication/5a246660-d931-44fd-be2e-fa8a1bb4ea33

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2027

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5a246660-d931-44fd-be2e-fa8a1bb4ea33

About this result

Related concepts (32)

Harmonic

A harmonic is a sinusoidal wave with a frequency that is a positive integer multiple of the fundamental frequency of a periodic signal. The fundamental frequency is also called the 1st harmonic, the other harmonics are known as higher harmonics. As all harmonics are periodic at the fundamental frequency, the sum of harmonics is also periodic at that frequency. The set of harmonics forms a harmonic series. The term is employed in various disciplines, including music, physics, acoustics, electronic power transmission, radio technology, and other fields.

Musical tone

Traditionally in Western music, a musical tone is a steady periodic sound. A musical tone is characterized by its duration, pitch, intensity (or loudness), and timbre (or quality). The notes used in music can be more complex than musical tones, as they may include aperiodic aspects, such as attack transients, vibrato, and envelope modulation. A simple tone, or pure tone, has a sinusoidal waveform. A complex tone is a combination of two or more pure tones that have a periodic pattern of repetition, unless specified otherwise.

Quarter tone

A quarter tone is a pitch halfway between the usual notes of a chromatic scale or an interval about half as wide (orally, or logarithmically) as a semitone, which itself is half a whole tone. Quarter tones divide the octave by 50 cents each, and have 24 different pitches. Quarter tones have their roots in the music of the Middle East and more specifically in Persian traditional music. However, the first evidenced proposal of the equally-tempered quarter tone scale, or 24 equal temperament, was made by 19th-century music theorists Heinrich Richter in 1823 and Mikhail Mishaqa about 1840.

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A synchrophasor estimator characterized by attenuated self-interference and robustness against DC offsets: The DCSOGI interpolated DFT

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