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伯甫苍
6 years ago
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6 附录 A 图 A 为图脉冲电压下 P 信号散点图 Qmax... P 信号幅值 V] 相对时间.7 Fig.A 图 A 脉冲电压下 P 信号统计图谱 Statistical chart of partial discharge signal under pulse voltage 样本的峭度随老化时间变化结果如图 A 所示不同样本的峭度随老化时间变化规律并不相同但对比匝间和对地绝缘结果可发现匝间绝缘的峭度随老化时间增长在大部分老化周期为正值而对地绝缘样本峭度在大部分老化周期为负值主要的原因可能有个 : 样本外层的对地绝缘部分在绕包过程中云母带容易出现褶皱因而形成气隙 ; 因为对地绝缘样本的电场集中点比匝间绝缘多因此对地绝缘样本更容易出现多气隙放电特征 7 对地绝缘 urtosis 匝间绝缘 - 老化周期 h] 图 A 样本平均放电量峭度随老化时间变化 Fig.A urtosis of mean discharge quantity for specimens after different aging time

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