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主传动直流回路过压故障是交-直-交中压变频器常见的故障。通过分析35kV输入电压的波动、闪跌对主传动DC-link电压的影响、低温高负荷轧制对DC-link电压的影响以及主轴发生设备事故对主传动装置的影响,提高了对设备运行状况的诊断和预测分析能力。通过优化调节器参数,优化功率单元IGCT的脉冲模式,增加了模深度控制程序,优化整流功率预控,提高了直流回路电压的稳定性,减少了直流回路过压故障。
The main drive DC circuit overvoltage fault is AC - DC - AC voltage inverter common faults. By analyzing the fluctuation of 35kV input voltage, the effect of flash-down on the DC-link voltage of the main drive, the influence of low-temperature and high-load rolling on the DC-link voltage and the influence of equipment accident on the main drive of the main shaft, Diagnostic and predictive analysis capabilities. By optimizing the regulator parameters and optimizing the pulse mode of the power unit IGCT, an additional program of depth control is added to optimize the rectified power precontrol, which improves the stability of the DC link voltage and reduces the overvoltage fault of the DC link.