摘要
变压器空载合闸时,由于铁心的磁饱和状态会产生很大的励磁涌流。通过励磁涌流数学模型,详细说明了其产生机理。在MATLAB中建立空载合闸仿真模型,分析了涌流特性及对电力系统的危害。对涌流造成变压器送电失败的实际案例进行了详细分析,提出了解决方法并验证有效。为避免涌流造成变压器投运失败,提出了适用于工程实际的应对措施。
The magnetic saturation state of iron core will produce a large excitation inrush current, when the transformer is closed without load. Based on the mathematical model of inrush current, the mechanism of inrush current is explained in detail. The simulation model of no-load closing is established in Matlab, the characteristics of inrush current and its harm to power system are analyzed. In this paper, the actual case of transformer operation failure caused by inrush current is analyzed in detail, the solution is proposed and verified to be effective. In order to avoid transformer operation failure caused by inrush current, the corresponding measures suitable for engineering practice are put forward.
作者
王顺
徐超
张健
段瑞海
WANG Shun;ZHANG Jian;DUAN Ruihai;XU Chao(CCCC Mechanical&Electrical Engineering Co.,Ltd.,Beijing 100088,China)
出处
《电气应用》
2022年第5期86-91,共6页
Electrotechnical Application
关键词
变压器
励磁涌流
仿真模型
保护跳闸
transformer
inrush current
simulation model
protection trip
