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P-class phasor measurement unit algorithms using adaptive filtering to enhance accuracy at off-nominal frequencies

Roscoe, Andrew and Abdulhadi, I. F and Burt, Graeme (2011) P-class phasor measurement unit algorithms using adaptive filtering to enhance accuracy at off-nominal frequencies. In: 2011 IEEE International Conference on Smart Measurements for Future Grids (SMFG). IEEE, pp. 51-58. ISBN 9781457713132

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Abstract

While the present standard C.37.118-2005 for Phasor Measurement Units (PMUs) requires testing only at steady-state conditions, proposed new versions of the standard require much more stringent testing, involving frequency ramps and off-nominal frequency testing. This paper presents two new algorithms for “P Class” PMUs which enable performance at off-nominal frequencies to be retained at levels comparable to the performance for nominal frequency input. The performances of the algorithms are compared to the “Basic” Synchrophasor Estimation Model described in the new standard. The proposed algorithms show a much better performance than the “Basic” algorithm, particularly in the measurements of frequency and rate-of-change-of-frequency at off-nominal frequencies and in the presence of unbalance and harmonics.