两级电磁环网的系统阻抗实用计算方法
韩志锟,许文超,王震泉,俞豪君
(中国能源建设集团江苏省电力设计院有限公司,江苏 南京 211102)
摘 要:研究了两级电磁环网中变电站母线短路电流与系统阻抗的关系,提出一种实用计算方法,利用短路电流数据计算变电站的系统阻抗和联系阻抗。该方法无需利用软件进行电网建模仿真,即可计算得到系统阻抗和联系阻抗。研究结果表明,该计算方法快速有效,简洁实用,对解决实际工程设计问题有较好的效果。
关键词:电磁环网;变电站;系统阻抗;联系阻抗
中图分类号:TM632 文献标识码:B 文章编号:1007-3175(2016)07-0030-04
Calculation of System Impedance in Two-Level
Electromagnetic Looped Network
HAN Zhi-kun, XU Wen-chao, WANG Zhen-quan, YU Hao-jun
(Jiangsu Power Design Institute Co., Ltd, China Energy Engineering Group, Nanjing 2111 02, China)
Abstract: This paper tackled the correlation between short circuit current and system impedance of transformer substation busbar in a twolevel electromagnetic looped network. A practical method was proposed to calculate system impedance and interconnection impedance by analyzing short-circuit current data. This method was particularly targeting this problem without power network simulation by calculation software. The calculation results indicate that this method is fast, efficient, concise and practical, which has better effect for solving practical engineering design problems.
Key words: electromagnetic looped network; transformer substation; system impedance; interconnection impedance
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