摘要
GIS站操作隔离开关时会产生特快速暂态过电压(VFTO),对GIS站和相邻电气设备安全会造成严重威胁,必须采取措施对其进行抑制。用PSCAD软件对某550 kV典型GIS变电站建立了仿真模型,指出可通过抑制VFTO中主导频率分量以降低VFTO的能量,进而达到抑制VFTO峰值的目的。通过分析MOA位置与主导频率分量幅值之间的关系,确定了MOA的最佳位置,以最大程度降低VFTO。研究结果对于GIS站的设计、运维和设备保护具有一定的指导意义。
The very fast transient overvoltage(VFTO)caused by operation of disconnecting switch in gas insulated switchgears(GIS)will cause serious threat to insulation safety of GIS and adjacent equipments,so measures must be taken to suppress it.A simulation model of a 550 kV typical GIS substation is established by PSCAD in this paper,and it is pointed out that the VFTO energy can be reduced by suppressing the dominant frequency component,so as to achieve the purpose of suppressing VFTO.By analyzing the relationship between the MOA’s position and the amplitude of the dominant frequency component,the optimal position of the MOA is determined to minimize the VFTO.It can be shown that the research results have certain guiding significance for the design,operation,maintenance and equipment protection of GIS substation.
作者
李宜
张彼德
LI Yi;ZHANG Bide(School of Electric Engineering and Electronic Information,Xihua University,Chengdu 610039,China)
出处
《电瓷避雷器》
CAS
北大核心
2020年第4期41-45,共5页
Insulators and Surge Arresters
基金
四川省科技厅应用基础研究项目(编号:2017JY0204)。
