Title :
Harmonic Analysis Based on Prony Method with Acquisition Channel Error Correction
Author :
Yang, Guanlu ; Li, Yanfeng ; Cao, Zhenhua ; Yang, Kaidi
Author_Institution :
Coll. of Inf. Sci. & Eng., Huaqiao Univ., Quanzhou, China
Abstract :
A new harmonic analysis method based on Prony algorithm with acquisition channel error correction is proposed in this paper. A Γ-type equivalent circuit is used to approximate the model of the voltage transformer, and the transfer function of the transformer is established with singular value decomposition (SVD) and total least squares (TLS) method through carrying out two experiments. Then, the data from the secondary side of the transformer are analyzed by Prony method to obtain the preliminary analysis results of harmonics and inter-harmonics. According the amplitude-frequency characteristic and phase-frequency characteristic of the transformer, the preliminary results are modified to obtain the final accurate results. Finally, the validity and accuracy of the method are proved by the analysis of an actual case.
Keywords :
equivalent circuits; error correction; harmonic analysis; least squares approximations; potential transformers; singular value decomposition; Prony method; SVD; TLS method; acquisition channel error correction; amplitude-frequency characteristic; equivalent circuit; harmonic analysis; phase-frequency characteristic; singular value decomposition; total least squares; transfer function; voltage transformer; Equations; Harmonic analysis; Mathematical model; Power system harmonics; Transfer functions; Voltage transformers; Prony algorithm; error correction; harmonic analysis; voltage transformer;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
DOI :
10.1109/iCECE.2010.280