机车通过关节式电分相过电压研究

分析了韶山7型电力机车通过关节式电分相时经常产生过电压的原因及影响因素,利用Matlab仿真软件建立了仿真模型,得到了暂态仿真波形,并对仿真波形进行了分析;提出利用阻容保护装置或氧化锌避雷器方法来减小过电压问题。仿真结果表明2种方法均能有效降低过电压。

Research on Over-voltage of Electric Locomotive Passing through Articulated Phase Break

The articulated phase insulator is especially suitable for the locomotive running in high-speed. However, the over-voltages frequently occur at phase insulator of overhead contact line system. The problem leads to power equipment operations wrongly and electric railway more dangerous. The electrical parameters is analysed. After that, The reasons of over-voltage occurrence and the factors of influence on the levels of over-voltage are discussed. Based on severl simulations, the transient simulation waveforms are obtained. The reasons of generating over-voltages in neutral section are analyzed. This paper proposed two useful approaches to reduce over-voltage. One of the approaches is the RC protective installation and the other approach is MOA protective pattern. The simulation results show that they can effectively restrain over-voltage in neutral sections.