摘要
GIS设备在中国电网建设中占据着重要位置,设备的安全运行至关重要。在高压设备发生短路故障时,通过设备导体与壳体的短路电流峰值高达171 k A,这对设备的动稳定性和热稳定性都提出了苛刻的要求。针对接地回路,热稳定性考核通过理论计算即可满足要求,但对于动稳定性分析,由于空间结构复杂,理论计算较为困难。文中以小型化550 kV GIS用接地开关的接地回路为研究对象,基于Ansys 16.1的电磁场与结构场进行耦合分析,由电磁场得出接地回路的电流密度与磁通密度分布,给出各部位电动力密度云图,再导入结构场,对接地回路导流排的受力进行强度校核,最终完成导流排结构的优化。通过研究,对比不同结构的仿真结果,分析结构差异,提出了优化设计方案,为高压GIS接地回路的结构改进设计提供了理论基础。
High voltage circuit breaker occupies an important position in the grid, the safety of which is essential. The peak of short-circuit current on the conductors and cases of GIS reaches up to 171 kA when high voltage circuit breaker meets short-circuit fault,which puts forward higher requirements to the thermal stability and dynamic stability of GIS. However, difficulty exists when theoretical calculation is conducted for thermal and dynamic stability because of the complexity of spatial structure. Electromagnetic-structure coupling analysis for grounding loop used in miniaturized 550 kV GIS has been conducted in this paper based on Ansys 16.1.The distribution of current density and magnetic flux density has been obtained through electromagnetic field. And the contour of electric power density in all parts is given, which is imported into structure field to check the strength of diversion row in grounding loop. And the structure optimization of diversion row has been realized. The program of design optimization is proposed through the analysis of simulation results of different structures,which provides a theoretical basis for the structural design of grounding loop in high voltage GIS.
作者
勾国营
杨姣龙
骆常璐
苏戈
李松磊
GOU Guoying YANG Jiaolong LUO Changlu SU Ge LI Songlei(Henan Pingzhi High-voltage Switchgear Co.,Ltd., Henan Pingdingshan 467013, China)
出处
《高压电器》
CAS
CSCD
北大核心
2017年第8期105-109,共5页
High Voltage Apparatus
关键词
有限元
电磁-结构耦合
电动力
接地回路
优化设计
finite element
electromagnetic-structure coupling
electrodynamic force
grounding loop
design opti- mization
