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panyingxiang: ½ð±Ò+5 2015-08-21 10:41:20
½éµçÆ×ʱÓò²âÊÔ¼¼ÊõÖ÷ÒªÊǼ«»¯È¥¼«»¯µçÁ÷·¨£¨PDC£©Óë»Ø¸´µçѹ·¨£¨RVM£©[1-3]¡£ÆäÖÐPDC²âÊÔ»·½Ú¼òµ¥£¬¶øRVM²âÊÔ¸´ÔÓ¡£Í¨³£µÄ½éÖʻظ´µçѹ¶àÓɻظ´µçѹÒDzâÁ¿µÃ³ö£¬È»¶øÓÉÓÚÊܵ½»Ø¸´µçѹÒÇÊäÈëµçÁ÷µÄÏÞÖÆ£¬Ê¹´«Í³µÄ»Ø¸´µçѹ±í½öÄܹ»²âÁ¿¾øÔµµç×費̫¸ßµÄÓͽþµçÁ¦±äѹÆ÷µÄÓÍÖ½¾øÔµÌåϵ[4]¡£¶ÔÓÚ¾øÔµÐÔÄܸü¼ÓÓÅÒìµÄµçÁ¦µçÀ½»Áª¾ÛÒÒÏ©½éÖʵȾøÔµÌåϵ£¬ÔòÐèÒªÓиü¸ßÊäÈë×迹µÄ»Ø¸´µçѹ±í²ÅÄܹ»ÊµÏÖ¡£

Time domain dielectric spertroscopy testing technololy mainly contains Polarization and Depolarization Current(PDC) and Recovery Voltage Method(RVM). The testing procedure of PDC is simple, and that of RVM is complex. Usually, the recovery voltage of dielectric is measured by recovery voltage meter, however, due to the limitation of the input current, the traditional recovery voltage meter can only measure the oil-paper insulation system of oil immersed power transformer, whose insulation resistance shall not be too high.  For those insulation system with more excellent insulation performance, such as the cross-linked  power-cable polyethylene, it requires s a recovery voltage meter with higher input impedence.
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