中国电机工程学报2011，Vol.31Issue(22)：112-118,7.
特高压变压器长波前时间雷电冲击试验及其等价性分析
Equivalent Analysis on UHV Transformer Lightning Impulse Test With Longer Duration of Front Time
张文亮 1张国兵2
作者信息
- 1. 国家电网公司,北京市西城区100031
- 2. 国网电力科学研究院,湖北省武汉市430074
- 折叠
摘要
Abstract
The lightning impulse tests for the high voltage （HV） winding of ultra-high voltage （UHV） transformers are characterized by a longer duration of the front time. The front time of lightning impulse voltage mainly affects the winding vertical insulation. The lightning impulse test with a longer duration of the front time may result in an inaccurate examination on the vertical insulation; however, the chopped impulse test can solve this problem.. In order to deal with the fact that the lightning impulse test with a longer duration of the front time can not check the lightning impulse characteristics under the standard duration of the front time, the chopped impulse test was put forward. The equivalent analysis on potential distribution and gradient voltage distribution under chopped impulse and full impulse was conducted based on a lower voltage impulse measurement example. It is suggested that the chopped impulse test can be taken as the replenish test for the full impulse test with a longer duration of the front time, so as to optimize the UHV transformer lightning impulse test sequence.关键词
特高压/交流变压器/雷电冲击试验/波前时间/截断特性/电位分布/梯度分布Key words
ultra high voltage （UHV）/AC transformer/lightning impulse test/front time/chopped characteristics/potential distribution/gradient voltage distribution分类
信息技术与安全科学引用本文复制引用
张文亮,张国兵..特高压变压器长波前时间雷电冲击试验及其等价性分析[J].中国电机工程学报,2011,31(22):112-118,7.
