本文選題：聚酰亞胺 + 沿面放電��； 參考：《絕緣材料》2016年11期

【摘要】：聚酰亞胺材料以其優(yōu)越的介電性能廣泛應(yīng)用于電力系統(tǒng)的絕緣中,其表面發(fā)生沿面放電是影響其絕緣性能的關(guān)鍵因素之一。利用自行搭建的試驗(yàn)系統(tǒng),以純聚酰亞胺、玻璃纖維和鈦酸鉀改性的聚酰亞胺為研究對(duì)象,借助掃描電子顯微鏡,分析其表面碳化情況,并測(cè)量其在標(biāo)準(zhǔn)大氣壓、低氣壓和高真空三種狀態(tài)下的電氣強(qiáng)度。結(jié)果表明:含有鈦酸鉀的聚酰亞胺材料和直角倒角的純聚酰亞胺材料碳化現(xiàn)象不太明顯。掃描電鏡顯示,低氣壓下絕緣材料表面比標(biāo)準(zhǔn)大氣壓下的平滑,含有玻璃纖維和鈦酸鉀的聚酰亞胺材料表面均出現(xiàn)孔洞。標(biāo)準(zhǔn)大氣壓下,含有鈦酸鉀的聚酰亞胺材料電氣強(qiáng)度最低,含有玻璃纖維的聚酰亞胺電氣強(qiáng)度最高;低氣壓下,含有玻璃纖維的聚酰亞胺材料電氣強(qiáng)度最低,厚度較小時(shí),含有鈦酸鉀的聚酰亞胺材料電氣強(qiáng)度略低于純聚酰亞胺;高真空下,純聚酰亞胺的絕緣性能最好。
[Abstract]:Polyimide materials are widely used in the insulation of power systems due to their excellent dielectric properties. Surface discharge is one of the key factors affecting the insulation performance of polyimide materials. The surface carbonation of pure polyimide, glass fiber and potassium titanate modified polyimide was analyzed by means of scanning electron microscope (SEM), and its surface carbonation was measured at the standard atmospheric pressure by using the self-built test system, using the pure polyimide, glass fiber and potassium titanate modified polyimide as the research object. Electrical strength at low pressure and high vacuum. The results show that the carbonation of polyimide material containing potassium titanate and pure polyimide material with right angle chamfer is not obvious. Scanning electron microscope (SEM) showed that the surface of insulating material at low pressure was smoother than that under standard atmospheric pressure, and pores were found in the surface of polyimide material containing glass fiber and potassium titanate. At the standard atmospheric pressure, the polyimide material containing potassium titanate has the lowest electrical strength, and the polyimide containing glass fiber has the highest electrical strength; at low pressure, the polyimide material containing glass fiber has the lowest electrical strength, and the thickness is small. The electrical strength of polyimide containing potassium titanate is slightly lower than that of pure polyimide, and the insulation property of pure polyimide is the best under high vacuum.
【作者單位】： 華北電力大學(xué)電氣與電子工程學(xué)院;北京控制工程研究所;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51277066)
【分類號(hào)】：TM21

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