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首页> 外文期刊>Electrical engineering in Japan >Insulation Characteristics of GIS under Nonstandard Lightning Impulse Oscillations: Insulation Characteristics under Double-Frequency Oscillations with Various Frequencies and Damping Ratios
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Insulation Characteristics of GIS under Nonstandard Lightning Impulse Oscillations: Insulation Characteristics under Double-Frequency Oscillations with Various Frequencies and Damping Ratios

机译：非标准雷电冲击振荡下的GIS绝缘特性：不同频率和阻尼比的双频振荡下的绝缘特性

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摘要

To improve GIS insulation specifications, it is important to recognize the insulation characteristics under oscillatory overvoltage waveforms occurring in the field. This paper describes investigations of insulation characteristics for double-frequency oscillatory waveforms with various frequencies and damping ratios. It was found that minimum breakdown voltages (V{sub}(min)) were irrelevant to frequency changes in the range of experimental conditions under the same damping conditions. On the other hand, V{sub}(min) rose with the damping ratio rising under the same frequency conditions. The insulation characteristics at a valley of oscillation were investigated using actual breakdown voltages. It was found that the insulation characteristics were treated ail-inclusively based on the characteristics of V{sub}(min) for damping time.
机译：为了提高GIS绝缘规范，重要的是要认识到在现场出现的振荡过电压波形下的绝缘特性。本文介绍了具有不同频率和阻尼比的双频振荡波形的绝缘特性研究。发现在相同的阻尼条件下，最小击穿电压（V {sub}（min））与实验条件范围内的频率变化无关。另一方面，在相同的频率条件下，随着阻尼比的增加，V {sub}（min）上升。使用实际击穿电压研究了振荡谷处的绝缘特性。发现基于V {sub}（min）的阻尼时间特性对绝缘特性进行了全方位的处理。

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