Deterioration of Insulation Performance and Texicity on Discharge Decomposition Products in Gaseous Dielectric Systems

研究了SFG气体在气体介质体系中对放电分解产物的毒性测定及其对绝缘性能的抑制作用。为了改变有毒放电分解产物的性质，我们尝试了激光产生的等离子体散热编码和激光控制的电晕放电。在此基础上，我们完成了以下研究：(1)在SFG气体中，电晕放电形成的有毒分解产物的种类和数量强烈依赖于SFG气体暴露开始时混合的H2O和O2等杂质。(2)这些有毒分解产物可以用沸石等吸收剂去除。但这种方法不能消除固体分解产物。(3)这些气体与电极表面的电绝缘性能没有太大的直接关系，但这些气体会与电极表面发生反应，从而改变电极的形状，影响电极的绝缘性能。(4)在空气中，脉冲激光辐照等离子体过程的计算程序已经开发出来。(5)激光在直流辉光电晕放电中产生的低温高密度等离子体(流光)改变气体性质的技术是可能的。

We have investigated the toxicity measurement on discharge decomposition products in gaseous dielectric systems in which SFG gas is used and its deterloration effect to those insulation performance. In order tio change the nature of toxic discharge decomposition products, we have had a try on the plasma calsulating code which is produced by laser and the corona discharge which are controlled by laser.From above we can complete those researches as following :(1) In SFG gas, the sorts and quantity of toxic decomposition products formed by corona discharge are depended strongly on the impurities such as H2O and O2 which are mixed on the beginning of the poring of SFG gas.(2) Those toxic decomposition products can be eliminated by an absorbent as Zeelite. But solid decomposition products can not be eliminated by this method. It relates strongstly with the deterioration of electrode surface.(3) Those gases don't have much connection with electrical insulatio performance directly, but those gases will react with electrode surface, and as a consequence of those, the shape of electrode changes and the insulation performance diteriorates.(4) In air, the calsulating code of plasma process with are irradiated by pulsed laser have been developed.(5) The technology of changing gaseous nature by the method of low-tenperature and high density plasma (streamer) which is produced by laser in the DC glow-corona discharges is possible.