Experimental study on the effect of H_(2)O and O_(2) on the degradation of SF_(6) by pulsed dielectric barrier discharge  

作　　者：李亚龙 万昆 王宇非 张晓星 杨照迪 傅明利 卓然 王邸博 Yalong LI;Kun WAN;Yufei WANG;Xiaoxing ZHANG;Zhaodi YANG;Mingli FU;Ran ZHUO;Dibo WANG(Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,People's Republic of China;State Grid HuBei Direct Current Company,Yichang 443002,People's Republic of China;CSG Electric Power Research Institute CO.Ltd,Guangzhou 510080,People's Republic of China)

机构地区：[1]Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,People's Republic of China [2]State Grid HuBei Direct Current Company,Yichang 443002,People's Republic of China [3]CSG Electric Power Research Institute CO.Ltd,Guangzhou 510080,People's Republic of China

出　　处：《Plasma Science and Technology》2024年第2期125-131,共7页等离子体科学和技术（英文版）

基　　金：supported by Guizhou Province (Ceneral), grant/award number Qian Ke He Zhi Cheng [2022] General 207, National Natural Science Foundation of China (No. 52307170);Natural Science Foundation of Hubei Province, China (No. 2023AFB382)。

摘　　要：SF_(6) has excellent insulation performance and arc extinguishing ability,and is widely used in the power industry.However,its global warming potential is about 23,500 times that of C0_(2),it can exist stably in the atmosphere,it is not easily degradable and is of great potential harm to the environment.Based on pulsed dielectric barrier discharge plasma technology,the effects of H_(2)O and 0_(2) on the degradation of SF_(6) were studied.Studies have shown that H_(2)O can effectively promote the decomposition of SF_(6) and improve its degradation rate and energy efficiency of degradation.Under the action of a pulse input voltage and input frequency of 15 kV and 15 kHz,respectively,when H_(2)O is added alone the effect of 1% H_(2)O is the best,and the rate and energy efficiency of degradation of SF_(6) reach their maximum values,which are 91.9% and 8.25 g kWh^(-1),respectively.The synergistic effect of H_(2)O and O_(2) on the degradation of SF_(6) was similar to that of H_(2)O.When the concentration of H_(2)O and O_(2) was 1%,the system obtained the best rate and energy efficiency of degradation,namely 89.7% and 8.05 g kWh~(-1),respectively.At the same time,different external gases exhibit different capabilities to regulate decomposition products.The addition of H_(2)O can effectively improve the selectivity of S0_(2).Under the synergistic effect of H_(2)O and O_(2),with increase in O_(2) concentration the degradation products gradually transformed into SO_(2)F_(2).From the perspective of harmless treatment of the degradation products of SF_(6),the addition of O_(2) during the SF_(6) degradation process should be avoided.

关 键 词：SF_(6) pulsed dielectric barrier discharge DEGRADATION discharge gas 

分 类 号：TM213[一般工业技术—材料科学与工程]