交直流气体绝缘管道输电装备微粒污染治理措施研究进展

气体绝缘输电设备内微粒污染物是造成设备故障的主要原因之一,随着设备电压等级的升高,微粒诱发的绝缘故障占设备总故障的比例越来越大,探索高效的微粒抑制措施,对降低设备故障率、保障设备安全稳定运行具有重要意义。文中对交直流GIS/GIL中微粒污染治理措施研究进展进行梳理,首先概述了气体绝缘设备中抑制微粒的基本原理,从微粒启举抑制、微粒运动调控和绝缘子表面微粒吸附抑制3方面阐述了如何降低微粒对设备绝缘的潜在威胁;进一步归纳总结了现有的微粒治理方法,对其优势和不足进行了评价,提出了该领域有待解决的关键问题,以期为管道输电装备的设计制造和安全运行提供参考。

Influence of Various Zirconia Additives on High Temperature Properties of Magnesia Spinel Brick

Magnesia spinel refractory is a promising material because of its good properties at high temperature,good exfoliation-and coorosion-resistances,Three kinds of additives containing ZrO2 were added o magnesia spinel refacto-ries to get better exfoliation resistance,corrosion resistance and adhensiveness,Three kinds of ZrO2-containing additives added to optimize the properties of the material are particularly discussed in this paper.

Study on the Anti—oxidation of Al2O3—MgO—C Based Refractory

The anti-oxidation agents containing Al2O3-MgO-C refractories was developed and the properties of them were investigated after being tratd at different temperature.It was found that the anti-oxidation agents could enhance the anti-oxidation property and increase the mechanic property of the refractories,The mineral components of the oxidation film were detected with XRD method.