全封闭组合电器室SF_6气体泄漏分布规律与气体检测布置策略
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摘要
全封闭组合电器(GIS)在运行过程中不免故障,会出现SF_6气体泄漏的问题;这不仅会对设备维护人员的人身安全构成极大威胁,也会对环境造成难以估量的负面影响。目前,SF_6气体检测及回收装置布置策略缺乏理论指导。针对盆式绝缘子开裂而造成的SF_6气体泄漏事故,基于FLUENT软件,结合SF_6气体泄漏的两相流三维非定常态湍流流动特征,搭建三维传递现象模型;进行真型尺寸GIS站室泄漏SF_6气体分布规律仿真研究。分析了GIS设备因故障而发生气体泄漏时,SF_6气体扩散的过程及SF_6气云的分布规律;比较了不同位置、不同方向出现单点泄漏时SF_6气体的扩散分布情况。再结合GIS室实际空间布局,指出应在贴地安全警示带距离地面0.5 m处及GIS设备上方沿纵横方向均匀布置SF_6气体检测设备,形成立体的空间密集网状检测系统。
During the operation of gas insulated substation( GIS),there will be problems of SF_6 gas leakage due to some failures,which will not only pose a great threat to the personal safety of equipment maintenance personnel,but also cause an incalculable negative impact on the environment. At present,the layout strategy of SF_6 gas detection and recovery device lacks theoretical guidance. Taking the SF_6 gas leakage accident caused by the cracking of basin insulator as an example,based on the FLUENT software,a three-dimensional transmission phenomenon was built,and simulated the distribution law of SF_6 leaking gas in true-size GIS station. Combined with the threephase unsteady turbulent flow characteristics of two-phase flow of SF_6 gas leakage,the process of SF_6 gas diffusion and the distribution of SF_6 gas cloud were analyzed when gas leakage occurs due to the faults of GIS equipment.And the distribution of SF_6 gas diffusion at single point and leakage in different locations and directions was compared,which provided reference for the location of SF_6 gas detection and also the arrangement of recovery device.In combination with the actual situation of the GIS station,the SF_6 gas detection equipment should be installed at a grounding safety warning zone 0. 5 m from the ground and evenly arranged in the vertical and horizontal directions above the GIS equipment to form a three-dimensional spatial dense mesh monitoring system.
During the operation of gas insulated substation( GIS),there will be problems of SF_6 gas leakage due to some failures,which will not only pose a great threat to the personal safety of equipment maintenance personnel,but also cause an incalculable negative impact on the environment. At present,the layout strategy of SF_6 gas detection and recovery device lacks theoretical guidance. Taking the SF_6 gas leakage accident caused by the cracking of basin insulator as an example,based on the FLUENT software,a three-dimensional transmission phenomenon was built,and simulated the distribution law of SF_6 leaking gas in true-size GIS station. Combined with the threephase unsteady turbulent flow characteristics of two-phase flow of SF_6 gas leakage,the process of SF_6 gas diffusion and the distribution of SF_6 gas cloud were analyzed when gas leakage occurs due to the faults of GIS equipment.And the distribution of SF_6 gas diffusion at single point and leakage in different locations and directions was compared,which provided reference for the location of SF_6 gas detection and also the arrangement of recovery device.In combination with the actual situation of the GIS station,the SF_6 gas detection equipment should be installed at a grounding safety warning zone 0. 5 m from the ground and evenly arranged in the vertical and horizontal directions above the GIS equipment to form a three-dimensional spatial dense mesh monitoring system.
引文
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9 魏利军.重气扩散过程的数值模拟[D].北京:北京化工大学,2000Wei Lijun.Numerical simulation of heavy gas dispersion[D].Beijing:Beijing University of Chemical Technology,2000
10 谢建鑫.基于三维成像技术的GIS室内站SF6泄漏检测系统的研制[D].北京:华北电力大学,2017Xie Jianxin.The development of leakage detection system for SF6gas in GIS interior substation based on 3D imaging technique[D].Beijing:North China Electric Power University,2017
11 胡世明,张政,魏利军,等.危险物质意外泄漏的重气扩散数学模拟[J].中国安全生产科学技术,2000(2):34-38Hu Shiming,Zhang Zhen,Wei Lijun,et al.Mathematical simulation of heavy gas diffusion in accidental leakage of dangerous materials[J].Journal of Safety Science and Technology,2000(2):34-38
12 丁宗果.光照水电站GIS电缆层SF6泄露扩散的通风模型试验研究[D].重庆:重庆大学,2007Ding Zongguo.The experiment and study of the model on the ventilation of the SF6leakage diffusion in the GIS cable layer of the guangzhao hydropower station[D].Chongqing:Chongqing University,2007
13 李玉春.海底双层输油管道泄漏扩散数值分析[J].科学技术与工程,2013,13(1):166-169Li Yuchun.Numerical analysis on leakage and diffusion of doubleskin oil pipeline under the sea[J].Science Technology and Engineering,2013,13(1):166-169
14 陈潜,邢晓凯,王炜硕.基于特征线法的输气管道泄漏瞬态仿真与分析[J].科学技术与工程,2017,17(30):217-222Chen Qian,Xing Xiaokai,Wang Weishuo.Transient simulation and analysis of gas pipeline leakage based on characteristics method[J].Science Technology and Engineering,2017,17(30):217-222
2 罗宏建,唐夏焘,王炯耿,等.日照作用下1 000 k V特高压GIS壳体的变形行为研究[J].科学技术与工程,2017,17(1):213-217Luo Hongjian,Tang Xiatao,Wang Jionggeng,et al.Deformation study of the 1 000 k V ultra high voltage GIS shell under solar radiation[J].Science Technology and Engineering,2017,17(1):213-217
3 李彦彰,陈梦,刘亚男,等.气体绝缘母线动态热路模型的研究[J].科学技术与工程,2017,17(12):184-189Li Yanzhang,Chen Meng,Liu Yanan,et al.Study on dynamic thermal-circuit model of gas insulated bus[J].Science Technology and Engineering,2017,17(12):184-189
4 王靖瑞,王健,倪潇茹,等.直流电场下C4F7N/CO2与SF6/N2混合气体中铝质球形自由微粒放电敏感度对比分析[J].电工技术学报,2018,33(20):4682-4691Wang Jingrui,Wang Jian,Ni Xiaoru,et al.Comparative analysis of discharge sensitivity by the free spherical aluminum particle in C4F7N/CO2and SF6/N2gas mixtures under DC electric field[J].Transactions of China Electrotechnical Society,2018,33(20):4682-4691
5 丁慧心,肖益民,周铁成.地下水电站出线竖井中SF6泄漏扩散的数值模拟分析[J].制冷与空调,2016,30(6):623-629Ding Huixin,Xiao Yimin,Zhou Tiecheng.Numerical simulation analysis of SF6diffuses in the shaft of underground hydropower station[J].Refrigeration and Air Conditioning,2016,30(6):623-629
6 吕欣.GIS中SF6气体泄漏点的检测分析与改进[D].广州:华南理工大学,2016LüXin.Analysis and improvement on leakage position monitor of SF6in GIS[D].Guangzhou:South China University of Technology,2016
7 王晓华.室内燃气泄漏扩散模拟分析[J].科学技术与工程,2012,12(32):8785-8787Wang Xiaohua.Simulation and analysis on leakage and diffusion of indoor gas[J].Science Technology and Engineering,2012,12(32):8785-8787
8 黄文宏,章保东,包其富,等.重质气体泄漏扩散模型研究综述[J].浙江化工,2009,40(7):18-22Huang Wenhong,Zhang Baodong,Bao Qifu,et al.A review of heavy gas dispersion mathematical model[J].Zhejiang Chemical Industry,2009,40(7):18-22
9 魏利军.重气扩散过程的数值模拟[D].北京:北京化工大学,2000Wei Lijun.Numerical simulation of heavy gas dispersion[D].Beijing:Beijing University of Chemical Technology,2000
10 谢建鑫.基于三维成像技术的GIS室内站SF6泄漏检测系统的研制[D].北京:华北电力大学,2017Xie Jianxin.The development of leakage detection system for SF6gas in GIS interior substation based on 3D imaging technique[D].Beijing:North China Electric Power University,2017
11 胡世明,张政,魏利军,等.危险物质意外泄漏的重气扩散数学模拟[J].中国安全生产科学技术,2000(2):34-38Hu Shiming,Zhang Zhen,Wei Lijun,et al.Mathematical simulation of heavy gas diffusion in accidental leakage of dangerous materials[J].Journal of Safety Science and Technology,2000(2):34-38
12 丁宗果.光照水电站GIS电缆层SF6泄露扩散的通风模型试验研究[D].重庆:重庆大学,2007Ding Zongguo.The experiment and study of the model on the ventilation of the SF6leakage diffusion in the GIS cable layer of the guangzhao hydropower station[D].Chongqing:Chongqing University,2007
13 李玉春.海底双层输油管道泄漏扩散数值分析[J].科学技术与工程,2013,13(1):166-169Li Yuchun.Numerical analysis on leakage and diffusion of doubleskin oil pipeline under the sea[J].Science Technology and Engineering,2013,13(1):166-169
14 陈潜,邢晓凯,王炜硕.基于特征线法的输气管道泄漏瞬态仿真与分析[J].科学技术与工程,2017,17(30):217-222Chen Qian,Xing Xiaokai,Wang Weishuo.Transient simulation and analysis of gas pipeline leakage based on characteristics method[J].Science Technology and Engineering,2017,17(30):217-222