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Due to the inherent defects of LIPP method in the examining system, the study on the space charge distribution in the full-size HVDC cables is still a challenge. In this paper, a new measurement system, designed on the basis of modified PWP method, was developed for measuring space charge distribution in real long HVDC cable. To check this measurement system, space charge distributions in real HVDC...
Based on theoretical analysis of pressure wave propagation method for the space charge distribution measurement in the plate samples, this paper suggested the processing method of space charge distribution data measured in coaxial samples such as high voltage power cable. In terms of Poisson Equation, considering variety of the sample's electric field, dielectric constant and density of space charge...
Though the space charge behavior of polyethylene under high DC or AC has been investigated and measured by many researchers, the results between different research groups have little comparability to each other. So itpsilas difficult to achieve a universal conclusion. A lot of experimental data and former research experiences we can acquire so far indicate that many factors affect space charge behavior...
Dielectrics may suffer various kinds of mechanical stress during the procedure of manufacture or application, and the mechanical stress has significant effect on the initiation of space charge breakdown. In this investigation, space charge is introduced into polymethyl methacrylate (PMMA) by electron beam irradiation, and the captured space charge can be triggered to detrap by needle tip or other...
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