The electric field distribution is critical to the insulation structure design of 1000-kV gas-insulated-switchgear (GIS) equipment. At present, it is not difficult to obtain the electric field distribution under commercial frequency sinusoidal voltage; however, for lightning impulse voltage, the electric field distribution is commonly substituted by electrostatic analysis under the peak voltage. As a result, this treatment may not embody the characteristics of the dielectric constant changing with frequency. In this paper, a frequency-domain mathematical model for transient analysis is established. The measured broadband frequency dielectric spectrum for the medium of a GIS spacer is well fitted by a H–N function model with three relaxation peaks. The transient analysis for a 1000-kV GIS spacer is realized by superposing the responses to the sinusoidal and direct current components of the lightning impulse waveform. The potential and electric field regulation for a 1000-kV GIS spacer under lightning impulse voltage is presented and analyzed. Furthermore, the computed results from traditional electrostatic analysis are introduced for comparison. The results indicate that the electrostatic analysis increases the computed electric field strength at the surface of the GIS spacer, while it decreases that at the interface between the GIS spacer and center conductor. It could provide computational support for the insulation structure design of 1000-kV GIS spacers.

中文翻译：

---

1000kV气体绝缘开关柜隔板雷电冲击电压下电场分布的计算与分析

电场分布对于 1000 kV 气体绝缘开关设备 (GIS) 设备的绝缘结构设计至关重要。目前，不难获得工频正弦电压下的电场分布；然而，对于雷电冲击电压，电场分布通常由峰值电压下的静电分析代替。因此，这种处理可能不会体现介电常数随频率变化的特性。本文建立了瞬态分析的频域数学模型。测得的 GIS 隔板介质的宽带频率介电谱与具有三个弛豫峰的 H-N 函数模型很好地拟合。1000 kV GIS 隔板的瞬态分析是通过叠加对雷电冲击波形的正弦和直流分量的响应来实现的。提出并分析了雷电冲击电压下1000 kV GIS隔板的电位和电场调节。此外，还介绍了传统静电分析的计算结果进行比较。结果表明，静电分析增加了 GIS 隔板表面的计算电场强度，而降低了 GIS 隔板和中心导体之间界面处的电场强度。可为1000kV GIS间隔件的绝缘结构设计提供计算支持。提出并分析了雷电冲击电压下1000 kV GIS隔板的电位和电场调节。此外，还介绍了传统静电分析的计算结果进行比较。结果表明，静电分析增加了 GIS 隔板表面的计算电场强度，而降低了 GIS 隔板和中心导体之间界面处的电场强度。可为1000kV GIS间隔件的绝缘结构设计提供计算支持。提出并分析了雷电冲击电压下1000 kV GIS隔板的电位和电场调节。此外，还介绍了传统静电分析的计算结果进行比较。结果表明，静电分析增加了 GIS 隔板表面的计算电场强度，而降低了 GIS 隔板和中心导体之间界面处的电场强度。可为1000kV GIS间隔件的绝缘结构设计提供计算支持。而在 GIS 间隔件和中心导体之间的界面处，它减小了。可为1000kV GIS间隔件的绝缘结构设计提供计算支持。而在 GIS 间隔件和中心导体之间的界面处，它减小了。可为1000kV GIS间隔件的绝缘结构设计提供计算支持。