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The Simultaneous Evolution of Space Charge and Conduction Current in LDPE
The development of a system to measure simultaneously the current and space charge in a dielectric is described. The results obtained for low density polyethylene samples show that the relationship between space charge accumulation and the time-dependent current is not straightforward. In accord wit...
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Published in: | IEEE transactions on dielectrics and electrical insulation 2021-04, Vol.28 (2), p.616-624 |
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container_title | IEEE transactions on dielectrics and electrical insulation |
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creator | Lv, Zepeng Ma, Yuntong Zhang, Chen Peng, Jinyang Wu, Kai Dissado, L. A. |
description | The development of a system to measure simultaneously the current and space charge in a dielectric is described. The results obtained for low density polyethylene samples show that the relationship between space charge accumulation and the time-dependent current is not straightforward. In accord with previous work on space charge limited currents, the transient currents initially decreased, but after a while an increment or peak appeared. Additionally, the generation and extraction of space charge packets caused an impulse-like current peak such as previously observed. By comparing the electric field and current at the anode, it was found that the increment and the peak of the anode current are determined by injected negative carriers reaching the anode rather than the increase of electric field at the anode. It is shown that the dynamical evolution of the current can be divided into three stages similar to transient space charge limited current theory. |
doi_str_mv | 10.1109/TDEI.2021.009324 |
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A.</creator><creatorcontrib>Lv, Zepeng ; Ma, Yuntong ; Zhang, Chen ; Peng, Jinyang ; Wu, Kai ; Dissado, L. A.</creatorcontrib><description>The development of a system to measure simultaneously the current and space charge in a dielectric is described. The results obtained for low density polyethylene samples show that the relationship between space charge accumulation and the time-dependent current is not straightforward. In accord with previous work on space charge limited currents, the transient currents initially decreased, but after a while an increment or peak appeared. Additionally, the generation and extraction of space charge packets caused an impulse-like current peak such as previously observed. By comparing the electric field and current at the anode, it was found that the increment and the peak of the anode current are determined by injected negative carriers reaching the anode rather than the increase of electric field at the anode. It is shown that the dynamical evolution of the current can be divided into three stages similar to transient space charge limited current theory.</description><identifier>ISSN: 1070-9878</identifier><identifier>EISSN: 1558-4135</identifier><identifier>DOI: 10.1109/TDEI.2021.009324</identifier><identifier>CODEN: ITDIES</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Anodes ; charge extraction ; charge injection ; Charge measurement ; conduction current ; Current measurement ; Electric fields ; Evolution ; Industrial safety ; Low density polyethylenes ; Space charge ; Steady-state ; Transient analysis ; transient space charge limited current theory</subject><ispartof>IEEE transactions on dielectrics and electrical insulation, 2021-04, Vol.28 (2), p.616-624</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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By comparing the electric field and current at the anode, it was found that the increment and the peak of the anode current are determined by injected negative carriers reaching the anode rather than the increase of electric field at the anode. It is shown that the dynamical evolution of the current can be divided into three stages similar to transient space charge limited current theory.</description><subject>Anodes</subject><subject>charge extraction</subject><subject>charge injection</subject><subject>Charge measurement</subject><subject>conduction current</subject><subject>Current measurement</subject><subject>Electric fields</subject><subject>Evolution</subject><subject>Industrial safety</subject><subject>Low density polyethylenes</subject><subject>Space charge</subject><subject>Steady-state</subject><subject>Transient analysis</subject><subject>transient space charge limited current theory</subject><issn>1070-9878</issn><issn>1558-4135</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNo9kN9LwzAQgIMoOKfvgi8Bnzsv1yRNH6WrOhgobD6HrE1dx9bMpBH87-2s-HR33Hc_-Ai5ZTBjDPKH9bxczBCQzQDyFPkZmTAhVMJZKs6HHDJIcpWpS3IVwg6AcYFyQhbrraWr9hD3vemsi4GWX24f-9Z11DV0dTSVpcXW-A9LTVfTwnV1rH7bRfTedj1tO7qcv5XX5KIx-2Bv_uKUvD-V6-IlWb4-L4rHZVJhzvpESKMagxsp0xwkZ1XTYIOVlFYNZW24UpXMFMcB5BLk8KnabAzWzAgpMEun5H7ce_TuM9rQ652LvhtOahRMZAKQpwMFI1V5F4K3jT769mD8t2agT8L0SZg-CdOjsGHkbhxprbX_eM5BZJimP5jIZF8</recordid><startdate>202104</startdate><enddate>202104</enddate><creator>Lv, Zepeng</creator><creator>Ma, Yuntong</creator><creator>Zhang, Chen</creator><creator>Peng, Jinyang</creator><creator>Wu, Kai</creator><creator>Dissado, L. 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Additionally, the generation and extraction of space charge packets caused an impulse-like current peak such as previously observed. By comparing the electric field and current at the anode, it was found that the increment and the peak of the anode current are determined by injected negative carriers reaching the anode rather than the increase of electric field at the anode. It is shown that the dynamical evolution of the current can be divided into three stages similar to transient space charge limited current theory.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TDEI.2021.009324</doi><tpages>9</tpages></addata></record> |
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subjects | Anodes charge extraction charge injection Charge measurement conduction current Current measurement Electric fields Evolution Industrial safety Low density polyethylenes Space charge Steady-state Transient analysis transient space charge limited current theory |
title | The Simultaneous Evolution of Space Charge and Conduction Current in LDPE |
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