Title :
Novel numerical methods for measuring distributions of space charge and electric field in solid dielectrics with deconvolution algorithm
Author :
Hu, Luoquan ; Zhang, Yewen ; Zheng, Feihu
Author_Institution :
Pohl Inst. of Solid State Phys., Tongji Univ., Shanghai, China
Abstract :
The deconvolution algorithm for measuring the distribution of space charge under DC by the pressure wave propagation (PWP) method is studied in this paper. A new Fredholm integral equation of the first kind, including a space charge distribution without a partial differential operator is presented. Numerical methods based on Tikhonov regularization for solving this integral equation and the original PWP equation are studied. Numerical simulation is studied for the effect of signal-to-noise ratio (SNR), and comparison with other algorithms is discussed. The numerical solution of an electric field distribution from measurements of a LDPE specimen is obtained successfully.
Keywords :
Fredholm integral equations; dielectric materials; electric fields; numerical analysis; polyethylene insulation; space charge; wave propagation; Fredholm integral equation; LDPE specimen; Tikhonov regularization; deconvolution algorithm; electric field distribution measurement; numerical method; numerical simulation; pressure wave propagation method; signal-to-noise ratio effect; solid dielectric; space charge distribution measurement; Charge measurement; Current measurement; Deconvolution; Dielectric measurements; Electric variables measurement; Integral equations; Numerical simulation; Pressure measurement; Solids; Space charge;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2005.1511106
