Recovery algorithm for space charge waveform under temperature gradient in PEA method

Author

Haosen Wang ; Kai Wu ; Qingdong Zhu ; Xia Wang

Author_Institution

Key Lab. of Electr. Insulation & Power Equip., Xi´an Jiaotong Univ., Xi´an, China

Volume

22

Issue

2

fYear

2015

fDate

Apr-15

Firstpage

1213

Lastpage

1219

Abstract

This paper describes a new recovery algorithm for space charge measurement under temperature gradient using the pulsed electro-acoustic (PEA) method. As the temperature difference exists, the density of media becomes inhomogeneous and the waveforms gained by the PEA system are distorted seriously. In this study, the effect of temperature gradient on the acoustic propagation is discussed firstly, and an extended general solution for the acoustic propagation equation is gained. Then, the system transfer function is improved by adding the quadratic approximation to the general solution of the general wave propagation equation. With this new recovery algorithm, the distortion of the waveform can be successfully suppressed. In addition, the PEA waveform recovery method for coaxial cables under temperature gradient is also discussed.

Keywords

acoustic wave propagation; gradient methods; pulsed electroacoustic methods; space charge; PEA method; acoustic propagation; coaxial cables; general wave propagation equation; pulsed electro-acoustic method; quadratic approximation; recovery algorithm; space charge measurement; space charge waveform; system transfer function; temperature gradient; Acoustic distortion; Attenuation; Equations; Mathematical model; Space charge; Temperature measurement; Transfer functions; Space charge; Waveform recovery; temperature gradient;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2015.7076824

Filename

7076824