丁登伟;韩先才;王宁华;刘卫东;张鹏飞;张紫薇;

• 1:清华四川能源互联网研究院
• 2:国家电网有限公司
• 3:清华大学电机工程与应用电子技术系

摘要(Abstract)：

为研究特高压气体绝缘金属封闭输电线路(gas insulated metal-enclosed transmission line,GIL)在交接耐压试验和运行时绝缘击穿激发的暂态电压特征,利用在1100 kV苏通GIL综合管廊工程安装的超宽频暂态电压监测系统,准确测量了GIL在耐压试验和运行时绝缘击穿所产生的暂态电压。分析了GIL在不同工况下典型绝缘击穿所产生暂态电压时域波形的持续时间、变化陡度以及幅值衰减特征。通过傅里叶变化分析了暂态波形的频域特征,发现特征频率与故障位置紧密相关。最后通过连续小波变换分析了暂态电压的时频特征,发现陡变电压的瞬时频率均超过了3 MHz,可通过暂态电压的时频分布图准确判断GIL是否发生次生放电。通过对暂态电压时域和频域特征分析,有助于弄清GIL绝缘故障时暂态电压行波激发及传播特征,准确评估暂态电压对GIL的绝缘危害,提高特高压GIL运行的可靠性。

关键词(KeyWords)： 特高压GIL;绝缘击穿;暂态电压监测;宽频电压传感;时频特征

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51977120);; 四川省重大科技专项项目(2018GZDZX0043)：电力网络智能化关键技术研究及示范应用~~

作者(Author): 丁登伟;韩先才;王宁华;刘卫东;张鹏飞;张紫薇;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.2531

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