Commutation failure of Yun-Guang UHVDC transmission system running in negative pole state and its control measures

被引：0

作者：

Chen, Shilong ^{[1
]}

Shu, Hongchun ^{[1
]}

Zhen, Ying ^{[1
]}

机构：

[1] Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650051, China

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2013年 / 33卷 / 06期

关键词：

Computer control systems - Electric power system control - Electric power transmission networks - Outages - UHV power transmission - Electric commutation - Electric grounding - Transmissions - Power transmission;

D O I：

10.3969/j.issn.1006-6047.2013.06.024

中图分类号：

学科分类号：

摘要：

The causes of commutation failure in UHVDC transmission system are analysed, its criterion is summarized and the control measures against the consequential commutation failure are studied. The simulation model of Yun-Guang ± 800 kV UHVDC transmission system with its actual parameters is built on PSCAD/EMTDC. The simulative results show that, the decrease of transformer ratio will not induce the commutation failure of inverter while its increase up to 3.52 will do; the commutation failure is not sensitive to the fault close angle for symmetrical three-phase grounding fault while it is sensitive to the fault close angle for two-phase short circuit fault and single-phase grounding fault, and the commutation failure occurs easily when the fault close angle is 90° or 270°; the grounding resistance and fault duration time have great influence on commutation failure.

引用

页码：128 / 133