电绝缘纸板的清洁生产

本文通过电绝缘纸板生产过程中的精心策划和控制 ,充分体现了清洁生产的思想不仅有利于环境保护还有利于产品质量的提高、企业长久效益的发展 ,同时也是一种现代管理思想的体现。

广信建成超高压变压器纸板生产线

作为国内产销量最大的绝缘板纸生产企业，湖南新邵广信电绝缘材料有限公司是专业从事电工用变压器纸板、变压器纸质绝缘成型件、薄电绝缘纸板的生产厂家，是全国绝缘材料标准化委员会成员单位。

新项目速览——

湖南新邵超高压电绝缘纸板二期竣工，建发集团四川永丰竹浆项目试产，江苏射阳国玺纸业项目开工，广西湘桂纸业9．5万7吨蔗渣浆项目获批，广西庆龙生活用纸项目开工.

Effect of Surface Charge on Flashover for Oil-Pressboard Insulation under AC-DC Combined Electric Field

For converter transformer, AC-DC combined electric field can trigger space charge accumulation on oil-impregnated pressboard interface. The accumulation of space charge on oil-pressboard interface can result in electric field distortion, trend to trigger surface discharge of barriers. This paper studied the influence of surface charge on flashover voltage of oil-impregnated pressboard under AC-DC combined electric field. The study finds that the flashover voltage of oil-pressboard interface under negative polarity DC superimposed AC electric field is higher than that.of positive DC superimposed AC voltage to form composite electric field. It was found that homopolar surface charge has been accumulated on the interface of oil-pressboard with positive or negative DC voltage through measuring surface potential by the electrostatic capacitive probe. The surface charge produced electric field in the opposite direction, which weakening the synthetic electric field strength. What＇s more, under the same conditions, the negative surface charge density oil-pressboard is much larger than the positive.