摘要
为了研究不同接线方式牵引变压器对牵引供电系统负序电流的影响,分析了不同接线方式牵引变压器电流不平衡度理论,得出其各自电流不平衡度数学模型;基于MATLAB仿真软件,以负载阻抗角差和电流比为变量,对其数学模型进行数值仿真,得出各牵引变压器电流不平衡度三维曲面图。仿真结果表明,牵引负载大小、相位差以及牵引变压器接线方式等因数不同,对负序电流的影响不同。
In order to study the influence quence current of traction power supply different connection modes is analyzed, of traction transformers with different system, the current imbalance connection modes on the negative se- degree and the mathematical models of current theory of traction transformers with imbalance are obtained respective- ly. Based on MATLAB simulation software and with impedance angle difference and the current ratio as the varia- bles, the mathematical model is simulated numerically, and the current imbalance three -dimensional surface graphs of every traction transformers are obtained. The simulation results show that the impacts of the negative se- quence vary with factors such as traction load size, phase difference and traction transformer connection model.
出处
《黑龙江电力》
CAS
2017年第5期430-433,共4页
Heilongjiang Electric Power
关键词
电气化铁路
牵引变压器
负序电流
电流不平衡度
MATLAB数值仿真
electrified railway
traction transformer
negative sequence current
current imbalance
MATLAB nu- merical simulation
