Effect of transient conditions on DFT-based synchrophasor estimator performance

Barchi, Grazia; Macii, David; Petri, Dario

doi:10.1109/amps.2012.6344011

Cited by 7 publications

(1 citation statement)

References 21 publications

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“…Much of the recent academic literature concerning potential PMU algorithms (e.g. [2] [3] [4] [5]) places the focus firmly on the phasor measurement, with little or no treatment of frequency and/or ROCOF, while some consideration is given to frequency measurement in [6] and [7].…”

Section: Introductionmentioning

confidence: 99%

Improving frequency and ROCOF accuracy during faults, for P class Phasor Measurement Units

Roscoe

Burt

Rietveld

2013

2013 IEEE International Workshop on Applied Measurements for Power Systems (AMPS)

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Many aspects of Phasor Measurement Unit (PMU) performance are tested using the existing (and evolving) IEEE C37.118 standard. However, at present the reaction of PMUs to power network faults is not assessed under C37.118. Nevertheless, the behaviour of PMUs under such conditions may be important when the entire closed loop of power system measurement, control and response is considered. This paper presents ways in which P class PMU algorithms may be augmented with software which reduces peak frequency excursions during unbalanced faults by factors of typically between 2.5 and 6 with no additional effect on response time, delay or latency. Peak ROCOF excursions are also reduced. In addition, extra filtering which still allows P class response requirements to be met can further reduce excursions, in particular ROCOF. Further improvement of triggering by using midpoint taps of the P class filter, and adaptive filtering, allows peak excursions to be reduced by total factors of between 8 and 40 (or up to 180 for ROCOF), compared to the C37.118 reference device. Steady-state frequency and ROCOF errors during sustained faults or unbalanced operation, particularly under unbalanced conditions, can be reduced by factors of hundreds or thousands compared to the C37.118 reference device

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Section: Introductionmentioning

confidence: 99%