多机架、热连轧精轧机中压传动系统的研究及应用  

Research and Application of Medium Voltage Drive System in Multi-stand Hot Continuous Rolling Finishing Mill

作　　者：南永辉 张哲 何成昭 周振邦 刘建平 周伟军 NAN Yonghui;ZHANG Zhe;HE Chengzhao;ZHOU Zhenbang;LIU Jianping;ZHOU Weijun(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou,Hunan 412001,China)

机构地区：[1]中车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《控制与信息技术》2022年第3期46-52,共7页CONTROL AND INFORMATION TECHNOLOGY

摘　　要：多机架、热连轧精轧机主传动系统具有快速加减载、频繁加减速、多机架耦合互扰等特点,对变频器性能及可靠性要求很高;而传统的传动系统存在着变压器结构复杂、网侧谐波含量高、电机控制响应慢及电机扭振等问题。为此,文章针对多机架、热连轧精轧机的应用特点,提出了一种高性能传动系统解决方案。相比传统系统,所提出的系统方案具有电路统一、网侧谐波含量低、电机速度响应快、主动抑制电机扭振等优势。文章介绍了轧机主传动系统的主电路方案、网侧变流器控制原理以及电机的矢量控制原理,重点分析了扭振产生的原因并介绍了电机扭振抑制方法。该方案通过了数字仿真和现场性能考核验证,实验结果表明,所提出的主传动系统具有优越的动态和稳态性能,网侧电压谐波含量小于4%,电机转矩能够响应负载的突然变化,多台电机能稳定工作,该传动系统能够完全满足现场热连轧工艺需求。Main drive system of multi-stand hot continuous rolling finishing mill has the characteristics of rapid loading and unloading, frequent acceleration and deceleration, multi-stand coupling and mutual interference, and has high requirements for the performance and reliability of frequency converter. Traditional drive system has some problems, such as complex transformer structure, high harmonic content in power grid measurement, slow motor control response, motor torsional vibration and so on.According to the application characteristics of multi-stand hot continuous rolling finishing mill, this paper proposes a high performance drive system solution. Compared with the traditional system, the proposed system has the advantages of unified circuit,low harmonic content in grid side, fast motor speed response, active suppression of motor torsional vibration and so on. It mainly introduces the main circuit scheme of the mill main drive system, the control principle of the grid side converter, and the vector control principle of the motor. Causes of torsional vibration are analyzed, and the suppression method of motor torsional vibration is introduced. The scheme has been verified by digital simulation and field performance evaluation. Experimental results show that the proposed main drive system has superior dynamic and steady-state performances, the voltage harmonic content is less than 4%, the motor torque can respond to the sudden change of load, multiple motors can work stably, and the transmission system can fully meet the requirements of field hot continuous rolling process.

关 键 词：轧机主传动 连轧机 谐波 陷波滤波器 负荷观测器 扭振 

分 类 号：TG333.71[金属学及工艺—金属压力加工]