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针对机车调度中交直型和交直交型机车单独运行以及2种类型机车在同一牵引变压器供电下混合运行等复杂工况对网侧电流影响严重的问题,分析了交直型SS4电力机车及交直交型HXD3电力机车的牵引传动系统原理,建立了根据机车级位和速度自动判别机车行驶段位的交直型和采用空间矢量脉宽调制控制策略(SVPWM)的交直交型机车的SIMULINK仿真模型。在此基础上建立了同一牵引变压器不同类型机车混合运行模型,对典型工况进行仿真分析,得出各工况运行下的网侧电流谐波次数、谐波含有量及总电流畸变率,可用于供电网谐振分析、谐波治理、调度运行等方面。
In view of the serious influence on grid-side current caused by the complex operation of AC / DC and AC / DC locomotives alone and the hybrid operation of the two types of locomotives under the same traction transformer power supply in locomotive dispatching, the influences of AC / DC SS4 locomotive and AC / HXD3 electric locomotive, a SIMULINK simulation model of AC / DC hybrid locomotive that discriminates locomotive locomotive position automatically according to locomotive position and speed and space vector pulse width modulation control strategy (SVPWM) is established. On this basis, the hybrid operating model of different locomotives with the same traction transformer is established. The simulation and analysis of typical working conditions shows that the number of harmonic currents, the harmonic content and the total current distortion under the conditions of operation are obtained. In the power supply network resonance analysis, harmonic control, dispatching operation and so on.