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Phase-orthogonal FIR filter based reactive power measurement for power meters

Duraiswamy, P and Selvaraja, SK (2021) Phase-orthogonal FIR filter based reactive power measurement for power meters. In: Analog Integrated Circuits and Signal Processing, 108 (2). pp. 317-322.

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Official URL: https://doi.org/10.1007/s10470-021-01833-y


In filter based reactive power measurements, the voltage is phase shifted by 90 � relative to the current. This paper presents a technique of measuring reactive power based on differential 90 � shifter. According to this method, the sampled voltage and the current signal passes through a pair of FIR filters that shifts +45� and -45�. Then, the two outputs are multiplied to measure the reactive power. A pair of FIR filters that are having identical flat magnitude responses and orthogonal phase responses are designed. Multiplier-less FIR structure is adopted for hardware implementation to reduce the chip area cost making the technique implementable in digital power meter. A detailed hardware architecture and its implementation in FPGA is presented. Furthermore, the measurement of reactive power for various frequencies between 50 and 250 Hz is also presented. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Item Type: Journal Article
Publication: Analog Integrated Circuits and Signal Processing
Publisher: Springer
Additional Information: The copyright for this article belongs to Springer
Keywords: Optical parametric oscillators; Phase meters; Reactive power, Current signal; Digital power meters; Hardware architecture; Hardware implementations; Multiplier-less; Phase response; Phase shifted; Power meters, FIR filters
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 26 Jul 2021 10:28
Last Modified: 26 Jul 2021 10:28
URI: http://eprints.iisc.ac.in/id/eprint/68962

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