GIS工程中接地系统仿真计算的应用及技术探讨

Application and Technology of the Simulation and Calculation of Grounding System in GIS Project

气体绝缘金属封闭开关设备(gas insulated metal-closed switchgear,GIS)是一种结构紧凑的多元件组合的开关装置,为保证其正常、可靠的运行,GIS的接地网应具有承载正常额定电流能力,也需承载短路故障电流的能力。在GIS工程设计时,应合理的进行GIS接地系统的设计和布置,使其利于降低GIS接触电压、短路故障电流和感应电流,保证工作人员和开关设备的安全。笔者结合工程,利用EMTDC仿真计算软件,对上述GIS接触电压、短路故障电流和感应电流进行了计算及探讨,并得出结论,对结论进行了分析并采取了应对措施以满足工程需求。

Gas insulated metal enclosed switchgear （GIS） is a compact multi-element combination switch device, in order to ensure the normal and reliable operation, the GIS grounding grid should be carrying with normal rated current capability, also need the load-carrying capacity of a short-circuit fault currents. In the design of GIS engi- neering, the design and layout of the GIS grounding system should be reasonable, which can reduce the contact voltage of GIS, short-circuit fault current and induced current, ensure the safety of the staff and switchgear. Com- bining with engineering, using EMTDC simulation software, this paper calculates and discusses the GIS contact voltage, short-circuit fault current and induced current, and draws the conclusion. The conclusion is analyzed and the corresponding measures are taken to meet the engineering requirements.