Transient Electric Field Measurement in the Liquid Dielectrics Using Computerized Laser Tomography

This paper presents an original method to measure ultrafast voltage transient responses and electric field distribution in liquid dielectrics. The capacitive probe is employed to record the fast voltage transient responses. The electric field is reconstructed with multiangular laser scanning of the space between electrodes and a modified arithmetic reconstruction technique. The finite-difference method (FDM) is used to compare and verify experimental results for symmetrical and asymmetrical electrode configurations. Numerical verification confirmed that the experimental results are accurate enough to be used in the design of oil-immersed dielectric systems.

[1]  R. Gordon.  A tutorial on art (algebraic reconstruction techniques) , 1974 .

[2]  I. I. Rushakov,et al.  Computed Tomography , 2019, Compendium of Biomedical Instrumentation.

[3]  M. Kristiansen,et al.  Optical measurement of high electric and magnetic fields , 1976, IEEE Transactions on Instrumentation and Measurement.

[4]  Predrag Osmokrovic,et al.  Measuring probe for fast transients monitoring in gas insulated substation , 1997 .

[5]  Sun Guang-shen.  KERR ELECTRO-OPTIC FIELD MAPPING MEASUREMENTS IN ELECTRON BEAM IRRADIATED POLYMETHYLMETHACRYLATE , 1990 .

[6]  Ronold P. King,et al.  The Electromagnetic Field in an EMP Simulator at a High Frequency , 1979, IEEE Transactions on Electromagnetic Compatibility.

[7]  Avinash C. Kak,et al.  Principles of computerized tomographic imaging , 2001, Classics in applied mathematics.

[8]  H M Hertz,et al.  Kerr effect tomography for nonintrusive spatially resolved measurements of asymmetric electric field distributions. , 1986, Applied optics.

[9]  Predrag Osmokrovic,et al.  Measuring system for fast transients monitoring in gas‐insulated substations , 2007 .

[10]  Wolfgang Hauschild,et al.  Statistical techniques for high-voltage engineering , 1992 .

[11]  Akiko Kumada,et al.  Kerr effect in gas and its application to noncontact measurement of electric field , 2002 .

[12]  R. M. Mersereau,et al.  Digital reconstruction of multidimensional signals from their projections , 1974 .

[13]  T. Takada,et al.  Electric field in transformer oil measured with the Kerr-effect technique , 1991 .

[14]  J. Filippini,et al.  REVIEW ARTICLE: Recent progress in Kerr cell technology: Physical considerations , 1975 .

[15]  M. Zahn,et al.  Kerr-effect Studies of an Insulating Liquid under Varied High-Voltage Conditions , 1974, IEEE Transactions on Electrical Insulation.

[16]  Predrag Osmokrovic,et al.  Numerical and experimental design of three-electrode spark gap for synthetic test circuits , 1994 .