Electrical waveform phasor measurements are receiving a steadily increasing interest due to their relevance in smart grid applications. In particular, the Taylor-Weighted Least Squares (TWLS) algorithm has been recently proposed for the estimation of the waveform phasor in dynamic conditions. Unfortunately, this algorithm provides inaccurate estimates when the analyzed waveform is affected by decaying dc offsets. To overcome this problem, a modified TWLS algorithm is proposed in this paper and its accuracy is analyzed through computer simulations when the acquired waveforms contain one or two decaying dc offsets. Several steady-state and dynamic conditions specified in the IEEE Standard C37.118.1-2011 are considered and the length of the observation intervals spans between two to four cycles at the nominal waveform frequency. Accuracy comparison with the classical TWLS algorithm is also performed.

Dynamic synchrophasor estimation in the presence of decaying DC offsets

Petri, Dario
2014-01-01

Abstract

Electrical waveform phasor measurements are receiving a steadily increasing interest due to their relevance in smart grid applications. In particular, the Taylor-Weighted Least Squares (TWLS) algorithm has been recently proposed for the estimation of the waveform phasor in dynamic conditions. Unfortunately, this algorithm provides inaccurate estimates when the analyzed waveform is affected by decaying dc offsets. To overcome this problem, a modified TWLS algorithm is proposed in this paper and its accuracy is analyzed through computer simulations when the acquired waveforms contain one or two decaying dc offsets. Several steady-state and dynamic conditions specified in the IEEE Standard C37.118.1-2011 are considered and the length of the observation intervals spans between two to four cycles at the nominal waveform frequency. Accuracy comparison with the classical TWLS algorithm is also performed.
2014
Conference Record - IEEE Instrumentation and Measurement Technology Conference
Stati Uniti d'America
Institute of Electrical and Electronics Engineers Inc.
9781467363853
Belega, Daniel; Petri, Dario
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/148269
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 4
social impact