| 一种抑制气体绝缘开关装置暂态地电位升高的措施 |
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| 引用本文： | 李六零,胡攀峰,邱毓昌,何涛.一种抑制气体绝缘开关装置暂态地电位升高的措施[J].西安交通大学学报,2005,39(6):624-627. |
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| 作者姓名： | 李六零 胡攀峰 邱毓昌 何涛 |
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| 作者单位： | 1. 西安交通大学电力设备电气绝缘国家重点实验室,710049,西安
2. 天荒坪抽水蓄能电站生产技术部,313302,湖州 |
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| 摘 要： | 在分析外壳地电位升高原因的基础上，提出了用电磁暂态程序计算外壳地电位升高的等值计算模型．通过对外壳地电位升高的计算，表明外壳地电位的升高足以危害与气体绝缘开关装置(GIS)相连的外围设备．为了防止外壳地电位升高对GIS的外围连接设备的影响，提出用线路金属氧化物避雷器限制快速暂态过电压的幅值，用氧化锌阀片来改善GIS与外围设备的连接方式以限制外壳地电位升高．计算结果表明，加装金属氧化物避雷器不仅可以抑制快速暂态过电压，而且可以较为有效地抑制外壳地电位升高，且氧化锌阀片的残压越低，其对外壳地电位升高的抑制效果越好．对国内某550kV GIS的外壳地电位升高进行了现场实测，结果表明计算波形与实测波形比较吻合．
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| 关 键 词： | 气体绝缘开关装置 快速暂态过电压 暂态地电位升高 金属氧化物避雷器 抑制 |
| 文章编号： | 0253-987X(2005)06-0624-04 |
| 修稿时间： | 2004年10月14 |
Suppression of Transient Ground Potential Rise in Gas Insulated Substation |
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| Li Liuling,Hu Panfeng,Qiu Yuchang,He Tao.Suppression of Transient Ground Potential Rise in Gas Insulated Substation[J].Journal of Xi'an Jiaotong University,2005,39(6):624-627. |
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| Authors: | Li Liuling Hu Panfeng Qiu Yuchang He Tao |
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| Institution: | Li Liuling1,Hu Panfeng1,Qiu Yuchang1,He Tao2 |
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| Abstract: | Based on analyzing the generating reasons of temporary ground potential rise (TGPR), a calculation model is suggested to calculate TGPR with electro-magnetic transient program (EMTP). The results show that TGPR is higher enough to damage the adjacent equipment connected with gas insulated substation (GIS). To prevent the detrimental TGPR, it is suggested that line-type metal-oxide arrester is adopted to suppress the very fast transient overvoltage (VFTO), and ZnO disc to improve the connection between GIS and adjacent equipment, and the lower residual voltage of ZnO disc, the better suppression effect on VFTO and TGPR. A site test of TGPR in a domestic 550 kV GIS is carried out. The waveform of site test coincides with the calculated one very well. |
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| Keywords: | gas insulated substation very fast transient overvoltage temporary ground potential rise metal-oxide arrester suppression |
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