2019
DOI: 10.1109/tdei.2019.008213
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Enhanced charge injection in rough HVDC extruded cable interfaces

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Cited by 10 publications
(13 citation statements)
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“…For pure LDPE as shown in the Figure 4 a, there is no obvious space charge accumulation under 20 kV/mm, but a small amount of heterocharge could be observed near the cathode under 40 kV/mm. It is considered that this heterocharge comes from ionization of impurities or transport of injected charges [ 18 , 22 , 23 ]. For composites, there is also no obvious space charge accumulation under 20 kV/mm in the composites except for XLPE-PS 1# and XLPE-PS 2# as shown in Figure 4 c,f, where a negative charge accumulates near the cathode as homocharge and could be noticed almost across the whole samples.…”
Section: Resultsmentioning
confidence: 99%
“…For pure LDPE as shown in the Figure 4 a, there is no obvious space charge accumulation under 20 kV/mm, but a small amount of heterocharge could be observed near the cathode under 40 kV/mm. It is considered that this heterocharge comes from ionization of impurities or transport of injected charges [ 18 , 22 , 23 ]. For composites, there is also no obvious space charge accumulation under 20 kV/mm in the composites except for XLPE-PS 1# and XLPE-PS 2# as shown in Figure 4 c,f, where a negative charge accumulates near the cathode as homocharge and could be noticed almost across the whole samples.…”
Section: Resultsmentioning
confidence: 99%
“…Sample preparation, storage and space charge measurements performed in the present study ((A), left). Previously performed work ((B), right) encompassing profilometry, field simulation and injection current estimation [5][6][7], allowing for the derivation of modified injection laws in the present study. A Cartesian coordinate system (x, y, z) is adopted, with estimated current density oriented here in the x-direction.…”
Section: Length = Cable Circumferencementioning
confidence: 99%
“…The surface structure was measured through profilometry and implemented in COMSOL Multiphysics ® , as indicated in Figure 2 [8]. Thereby, different distributions of the field enhancement factors (FEF) were found through solving Laplace's equation on measured surface profiles [7], which were dependent on surface geometry (referred to as Laplacian field below). Such effects establish a geometric field distribution, as shown in Figure 3B, where, locally, the field enhancements intensify charge injection from their respective regions on the surface [3,4].…”
Section: Length = Cable Circumferencementioning
confidence: 99%
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