20辊可逆冷轧机主传动控制系统的研究
发布时间：2018-07-31 10:29
【摘要】：随着钢铁工业的发展,钢坯重量的增加、轧制速度的提高以及主电动机功率的增大,国内外轧钢机主传动系统都曾发生过严重损坏事故。损坏的主要原因之一是主传动控制系统出现问题。轧机主传动控制系统的性能优劣直接影响到生产效率和产品质量,因此世界工业发达国家都投入了大量人力物力对轧机主传动控制系统进行研究。本文以鞍钢高性能硅钢工程20辊可逆冷轧机的工程设计为研究平台,从电气设计的角度对20辊可逆冷轧机主传动系统进行分析研究。主传动控制系统设计是一个比较复杂的问题,可以有许多不同的传动方案,传动方案的优化是进一步设计的前提,直接影响着设计结果。所以本文首先对主传动电气控制方案进行反复研究比较,最终确定了交-直-交公共直流母线脉冲脉宽调制(PWM)全数字矢量控制变频调速系统方案,选择了CONVERTEAM公司的ALSPA MV7000系列中压变频器,主传动变压器采用树脂绝缘干式整流变压器,主传动电动机采用笼式异步交流电动机。在深入学习控制工程理论的基础上,研究主传动系统的组成,完成了交-直-交变频调速系统方案的设计,对主传动控制系统的关键技术进行了重点阐述：采用IEGT大功率元件,确保变频器具有更高的可靠性；采用主动前端整流单元,确保变频器网侧电流为谐波很少的正弦波,且功率因数接近于1；采用三电平中性点箝位逆变单元,保证输出优越的电动机电压波形,使电动机电流包含更低的谐波电流；采用高性能控制器,配置了矢量控制软件,以实现高性能的PWM矢量控制计算、确保变频器的安全性。基于以上的理论研究完成了主传动变压器参数计算及型号确定；完成了主传动变频器的型号选择；完成了主传动电动机的设计。然后进行了硬件设备的安装和控制系统的调试和完善。鞍钢高性能硅钢工程20辊可逆冷轧机自调试运行后,轧制出的产品板型好、尺寸精度高、技术性能指标达均到了设计要求。该主传动控制系统在运行中具有稳定可靠、控制精度高、操作方便、维修简单等特点,验证了本文设计的正确性和可行性。实践证明在未来的冷轧生产线主传动变频装置中,交-交变频调速方式日趋被交-直-交变频调速方式所取代。
[Abstract]:With the development of iron and steel industry, the increase of billet weight, the increase of rolling speed and the increase of power of main motor, the main transmission system of rolling mill has been seriously damaged at home and abroad. One of the main causes of the damage is the failure of the main drive control system. The performance of the main drive control system of rolling mill directly affects the production efficiency and product quality, so the developed countries in the world have invested a lot of manpower and material resources to study the main drive control system of rolling mill. Based on the engineering design of 20 roll reversible cold rolling mill in Angang high performance silicon steel project, the main transmission system of 20 roll reversible cold rolling mill is analyzed and studied from the angle of electrical design. The design of main drive control system is a complicated problem, there can be many different transmission schemes, the optimization of transmission scheme is the premise of further design, which directly affects the design results. In this paper, the main drive electrical control scheme is studied and compared repeatedly, and the scheme of AC-DC-AC common DC bus pulse width modulation (PWM) full digital vector control variable frequency speed control system is finally determined in this paper. The ALSPA MV7000 series medium voltage converter of CONVERTEAM Company is selected. The resin insulated dry rectifier transformer is used in the main transmission transformer and the cage asynchronous AC motor is used in the main drive motor. On the basis of deeply studying the control engineering theory, the composition of the main drive system is studied, and the design of the AC-DC-AC variable-frequency speed regulating system is completed. The key technology of the main drive control system is described emphatically: adopting the IEGT high-power element, To ensure higher reliability of the inverter; to use active front-end rectifier unit to ensure that the converter grid side current is a sinusoidal wave with few harmonics, and the power factor is close to 1; to use three-level neutral point clamp inverter unit, The high performance controller and vector control software are used to realize the calculation of high performance PWM vector control and to ensure the safety of inverter. Based on the above theoretical research, the parameter calculation and model determination of the main drive transformer are completed; the type selection of the main drive converter is completed; and the design of the main drive motor is completed. Then the hardware installation and control system is debugged and perfected. After self-debugging and running of 20-high reversible cold rolling mill in Angang High-Performance Silicon Steel Project, the products rolled out have good plate shape, high dimension precision, and the technical performance indexes have reached the design requirements. The main drive control system has the characteristics of stable and reliable operation, high control precision, convenient operation and simple maintenance. The correctness and feasibility of the design are verified. It has been proved by practice that in the future main drive frequency conversion device of cold rolling production line, AC-AC frequency conversion speed regulation mode is gradually replaced by AC-DC frequency conversion speed regulation mode.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG333.15;TP273
本文编号：2155305
[Abstract]:With the development of iron and steel industry, the increase of billet weight, the increase of rolling speed and the increase of power of main motor, the main transmission system of rolling mill has been seriously damaged at home and abroad. One of the main causes of the damage is the failure of the main drive control system. The performance of the main drive control system of rolling mill directly affects the production efficiency and product quality, so the developed countries in the world have invested a lot of manpower and material resources to study the main drive control system of rolling mill. Based on the engineering design of 20 roll reversible cold rolling mill in Angang high performance silicon steel project, the main transmission system of 20 roll reversible cold rolling mill is analyzed and studied from the angle of electrical design. The design of main drive control system is a complicated problem, there can be many different transmission schemes, the optimization of transmission scheme is the premise of further design, which directly affects the design results. In this paper, the main drive electrical control scheme is studied and compared repeatedly, and the scheme of AC-DC-AC common DC bus pulse width modulation (PWM) full digital vector control variable frequency speed control system is finally determined in this paper. The ALSPA MV7000 series medium voltage converter of CONVERTEAM Company is selected. The resin insulated dry rectifier transformer is used in the main transmission transformer and the cage asynchronous AC motor is used in the main drive motor. On the basis of deeply studying the control engineering theory, the composition of the main drive system is studied, and the design of the AC-DC-AC variable-frequency speed regulating system is completed. The key technology of the main drive control system is described emphatically: adopting the IEGT high-power element, To ensure higher reliability of the inverter; to use active front-end rectifier unit to ensure that the converter grid side current is a sinusoidal wave with few harmonics, and the power factor is close to 1; to use three-level neutral point clamp inverter unit, The high performance controller and vector control software are used to realize the calculation of high performance PWM vector control and to ensure the safety of inverter. Based on the above theoretical research, the parameter calculation and model determination of the main drive transformer are completed; the type selection of the main drive converter is completed; and the design of the main drive motor is completed. Then the hardware installation and control system is debugged and perfected. After self-debugging and running of 20-high reversible cold rolling mill in Angang High-Performance Silicon Steel Project, the products rolled out have good plate shape, high dimension precision, and the technical performance indexes have reached the design requirements. The main drive control system has the characteristics of stable and reliable operation, high control precision, convenient operation and simple maintenance. The correctness and feasibility of the design are verified. It has been proved by practice that in the future main drive frequency conversion device of cold rolling production line, AC-AC frequency conversion speed regulation mode is gradually replaced by AC-DC frequency conversion speed regulation mode.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG333.15;TP273
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