特高压GIS变电站中VFTO特性及影响因素研究  

Characteristics and Influential Factors of VFTO in UHV GIS Substations

作　　者：王希[1] 

机构地区：[1]华北电力大学,河北保定071003

出　　处：《山东电力技术》2015年第7期10-13,共4页Shandong Electric Power

摘　　要：随着超高压和特高压输电技术的发展,气体绝缘金属封闭开关设备(GIS)得到了广泛的应用。气体绝缘金属封闭开关设备(GIS)中的隔离开关在操作过程中会产生幅值较大、频率极高、波前时间很短的特快速暂态过电压(VFTO),容易引起电气绝缘击穿和电磁干扰等一系列的问题,对GIS本体、变压器及相邻电气设备的绝缘安全造成很大危害。主要研究特快速暂态过电压产生的机理以及特快速暂态过电压的幅值、陡度和频率等特性,利用ATP-EMTP电磁暂态程序仿真特快速暂态过电压产生的波形,仿真在各种影响因素下的特快速暂态过电压波形,对几组波形进行分析研究,分析残余电荷、变压器入口电容等因素对特快速暂态过电压的影响。With the development of EHV and UHV transmission technology,gas insulated switchgear（GIS） has been used widely. In routine operation,disconnecting swithes in GIS will produce a large amplitude,high frequency,short front time very fast transient over-voltage （VFTO）.It is easy to cause a series of electrical insulation breakdown, electromagnetic interference and other incidents,and harm to GIS, transformers and adjacent electrical equipment insulation safety.Tile generated mechanism and characteristics including magnitude, steepness and frequency of VFTO are studied. Waveforms of VFTO in every special factors are simulated by the ATP-EMTP electromagnetic transient program, and then analyzed.Influences of residual charge, entrance capacitance of transformers,and other factors on VFTO are analyzed.

关 键 词：GIS 特快速暂态过电压 隔离开关 影响因素 

分 类 号：TM864[电气工程—高电压与绝缘技术]