摘要
提高变压器短路阻抗的方法有很多种,在自耦变压器中,中性点经小电抗接地是一种比较有效的方法。文中对故障电流抑制作用进行了分析。在自耦变压器的零序电路基础上,理论分析了中性点小电抗接地对高中压等值电抗的影响。文中举例计算了短路电流,数据验证分析了接地电抗对短路电流的影响。
There are many ways to improve the short-circuit impedance of transformers.In the Auto-transformer,grounding the neutral point by small reactance is an effective method.In this paper,the restraining effect of fault current is analyzed.Based on the zero sequence circuit of the Auto-transformer,the influence of grounding of the small neutral reactance on the high-medium voltage equivalent reactance is analyzed theoretically.In this paper,the short-circuit current is calculated with an example,and the influence of grounding reactance on the short-circuit current is verified and analyzed.
作者
姚富民
YAO Fumin(Gansu Jiu Steel Group Hongxing Iron&Steel Co.,ltd.,Jiayuguan 735100,Gansu,China)
出处
《电气传动自动化》
2024年第1期61-63,共3页
Electric Drive Automation
关键词
自耦变压器
电抗
接地
故障
短路电流
Auto-transformer
Reactance
Grounding
Malfunction
Shortcircuit current