摘要
针对高压、超高压直流塑料电力电缆中存在的空间电荷效应，以强极性材料ＢａＴｉＯ３ 作填料，用电声脉冲法装置，详细研究了填料含量对聚乙烯试样中空间电荷分布的影响，讨论了空间电荷的形成和抑制机理．试验结果表明：当ＢａＴｉＯ３ 质量分数为１ ％ 左右时，聚乙烯中空间电荷几乎可完全清除，提高了聚乙烯的直流短路击穿电场强度，根据直流预压电压的极性，其提高率在１２ ％ ～１６ ％之间，略微提高了试样的正负极性的直流击穿电场强度．
Space charge effect is undesirable for HV and EHV DC plastic power cable lines. Using BaTiO 3 as filler, space charge distribution in polyethylene is investigated by application of the electro acoustic pulse method. When the content of BaTiO 3 is 1%, the space charge becomes negligible. The breakdown strength of short circuit after DC prestress increases by 12%～16%, depending on the polarity of the DC voltage. The BaTiO 3 also increases slightly while the DC breakdown strength both positive and negative polarities in samples. Discussed are the formation and inhibition mechanisms of space charges.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2000年第1期84-87,103,共5页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金!59777001
