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

本文研究了SFG气体在气体介质系统中放电分解产物的毒性测量及其对绝缘性能的影响。为了改变有毒气体放电分解产物的性质，我们尝试了激光等离子体计算程序和激光控制电晕放电，完成了以下研究工作：（1）在SFG气体中，电晕放电产生的有毒气体分解产物的种类和数量与SFG气体中H_2O和O_2等杂质的混合有很大关系。(2)这些有毒的分解产物可以通过吸收剂如沸石来消除。但该方法不能消除固体分解产物。这与电极表面的劣化密切相关。(3)这些气体与电极的电绝缘性能没有直接的关系，但它们会与电极表面发生反应，导致电极形状发生变化，绝缘性能下降。(4)在空气中，编制了脉冲激光辐照等离子体过程的计算程序。(5)利用激光在直流辉光放电中产生的低温高密度等离子体（流光）来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.