Choice and properties of adaptive and tunable digital boxcar (moving average) filters for power systems and other signal processing applications

Roscoe, Andrew J. and Blair, Steven M. (2016) Choice and properties of adaptive and tunable digital boxcar (moving average) filters for power systems and other signal processing applications. In: IEEE Applied Measurements for Power Systems (AMPS 2016), 2016-09-28 - 2016-09-30, E.On Energy Research Center, RWTH Aachen University. (https://doi.org/10.1109/AMPS.2016.7602853)

[thumbnail of Roscoe-Blair-AMPS2016-Choice-and-properties-of-adaptive-and-tunable-digital-boxcar-filters]
Preview
 Text. Filename: Roscoe_Blair_AMPS2016_Choice_and_properties_of_adaptive_and_tunable_digital_boxcar_filters.pdf
Accepted Author Manuscript
Download (525kB)| Preview

Abstract

The humble boxcar (or moving average) filter has many uses, perhaps the most well-known being the Dirichlet kernel inside a short-time discrete Fourier transform. A particularly useful feature of the boxcar filter is the ease of placement of (and tuning of) regular filter zeros, simply by defining (and varying) the time length of the boxcar window. This is of particular use within power system measurements to eliminate harmonics, inter-harmonics and image components from Fourier, Park and Clarke transforms, and other measurements related to power flow, power quality, protection, and converter control. However, implementation of the filter in real-time requires care, to minimise the execution time, provide the best frequency-domain response, know (exactly) the group delay, and avoid cumulative numerical precision errors over long periods. This paper reviews the basic properties of the boxcar filter, and explores different digital implementations, which have subtle differences in performance and computational intensity. It is shown that generally, an algorithm using trapezoidal integration and interpolation has the most desirable characteristics.

ORCID iDs

Roscoe, Andrew J. ORCID logoORCID: https://orcid.org/0000-0003-1108-4265 and Blair, Steven M. ORCID logoORCID: https://orcid.org/0000-0002-3261-4803;
  • Item type:Conference or Workshop Item(Paper)
    ID code:57701
    Dates:
    Date
    Event
    24 October 2016
    Published
    1 August 2016
    Accepted
    Notes:© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:06 Sep 2016 11:36
    Last modified:19 Nov 2024 01:28
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/57701
CORE (COnnecting REpositories)