A sliding DFT algorithm for electric power measurement

Xin Tang; Xiangjun Zeng; Chunming Tu

doi:10.1117/12.717112

24 October 2006 A sliding DFT algorithm for electric power measurement

Xin Tang, Xiangjun Zeng, Chunming Tu

Proceedings Volume 6357, Sixth International Symposium on Instrumentation and Control Technology: Signal Analysis, Measurement Theory, Photo-Electronic Technology, and Artificial Intelligence; 635724 (2006) https://doi.org/10.1117/12.717112
Event: Sixth International Symposium on Instrumentation and Control Technology, 2006, Beijing, China

Abstract

With the advent of electronic meters, a variety of methods are now practical for measuring electrical quantities such as real power, reactive power and power factor etc. To reduce computation, a sliding discrete Fourier transform (DFT) algorithm for electric power measuring is presented. The sliding DFT calculates the components of utility voltages and currents described by factor A_i and B_i, which can be used to calculate power components. In the transform, the data of voltage and current are sampled synchronously, and each new DFT is efficiently computed directly from the results of the previous DFT. As a result, the overall computation time is reduced significantly. Theoretic analysis and simulation demonstrate the feasibility of the proposed method.

Citation Download Citation

Xin Tang, Xiangjun Zeng, and Chunming Tu "A sliding DFT algorithm for electric power measurement", Proc. SPIE 6357, Sixth International Symposium on Instrumentation and Control Technology: Signal Analysis, Measurement Theory, Photo-Electronic Technology, and Artificial Intelligence, 635724 (24 October 2006); https://doi.org/10.1117/12.717112

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