This paper deals with the experimental study on the correlation betweeninsulation resistance(R)and direct current(DC)component(i_(de))and corresponding aging degreeof insulation in the course of the aging within cross...This paper deals with the experimental study on the correlation betweeninsulation resistance(R)and direct current(DC)component(i_(de))and corresponding aging degreeof insulation in the course of the aging within cross linked polyethylene(XLPE)insulation.Theaging tests were performed on a section of 10 kV transmission XLPE cable by means of water needlemethod,and_R was measured by DC voltage superimposed method,R and i_(de)were found to besignificantly dependent on the correspondingaging degree of insulation in the course of aging ofXLPE,and different kind of aging stage has different characteristics.Beside,there are generallysimilar regularity but different amplitude in the course of aging of XLPE insulation in differentelectrolyte,and the various electrochemical tree were found on the surface of aging XLPE cableimmersed in CuSO_(4),solution.Therefore,according to the changing regularity of the DCcharacteristic parameters i.e.R and i_(de)within XLPE insulation judging the aging degree of XLPEinsulation will be an effective method.展开更多
基金Supported by the National Natural Science Foundation of China(59677018)
文摘This paper deals with the experimental study on the correlation betweeninsulation resistance(R)and direct current(DC)component(i_(de))and corresponding aging degreeof insulation in the course of the aging within cross linked polyethylene(XLPE)insulation.Theaging tests were performed on a section of 10 kV transmission XLPE cable by means of water needlemethod,and_R was measured by DC voltage superimposed method,R and i_(de)were found to besignificantly dependent on the correspondingaging degree of insulation in the course of aging ofXLPE,and different kind of aging stage has different characteristics.Beside,there are generallysimilar regularity but different amplitude in the course of aging of XLPE insulation in differentelectrolyte,and the various electrochemical tree were found on the surface of aging XLPE cableimmersed in CuSO_(4),solution.Therefore,according to the changing regularity of the DCcharacteristic parameters i.e.R and i_(de)within XLPE insulation judging the aging degree of XLPEinsulation will be an effective method.
