城际动车组四象限整流器控制策略研究与应用

在分析城际动车组单相四象限整流器拓扑结构的基础上，得到单相四象限整流器的数学模型，并采用电压外环和电流内环的控制策略，分别以直流侧给定电压、网侧给定电流为控制对象，实现直流侧电压和网侧电流的无差、准确控制。通过Simulink仿真及试验验证了该控制策略。试验结果表明：从预充电过程过渡到脉冲整流过程中，直流侧电压超调量较小。牵引/制动工况下，网侧电压和网侧电流相位相差0°/180°、波形正弦性好，直流侧电压稳定，波动较小。

Research and Application of Four-Quadrant Rectifier Control Strategy for Intercity EMU

On the basis of analyzing the topological structure of the single-phase four-quadrant rectifier of the intercity EMU, the mathematical model of the single-phase four-quadrant rectifier is obtained, and the control strategy of voltage outer loop and current inner loop is adopted. The DC side voltage and the grid side current are used as the control objects to realize the non-difference accurate control. Through Simulink simulation and testing, the proposed control strategy is verfiied. The test results show that during the transition from the pre-charging process to the pulse rectification process, the DC side voltage overshoot is small. Under traction/braking conditions, the phase difference between the grid side voltage and the grid side current is 0°/180°, the waveforms are well sinusoidal, and the DC side voltage is stable with small fluctuations.