S型电气绝缘节的建模与仿真

针对无绝缘轨道电路中S型电气绝缘节 ,本文运用电路理论中的支路电流法讨论了其数学模型的建立与仿真算法的实现 ,给出了绝缘节分别在空载和有负载两种情况下的几种典型特性曲线 ,并进一步分析了绝缘节的输入阻抗、电压传输及电气隔离特性。其各种数字仿真结果与实物测试结果具有相近的变化趋势 ,仿真精度满足要求。结果表明 :该模型能够很好地模拟S型绝缘节的电气特性 ,为S型绝缘节的设计提供了有力的分析工具。

Modeling and Simulation of S-shaped Electrical Sectionalizing Joints

With the branch current method in the circuit theory, this paper discusses realization of modeling and arithmetic of S-shaped electrical sectionalizing joints in jointless track circuits, It demonstrates several characteristic curves of the loaded and unloaded S-shaped joints and further analyses the characteristics of these joints such as the input impendence, voltage transfer and electrical isolation. The simulation results have the changing trend similar to the actual measurements and the simulation accuracy accords with the design demand. It is shown that this model simulates the electrical characteristics of sectionalizing joints very well and provides a good tool for analys in designing S-shaped sectionalizing joints.