大型连退线传动系统DROOP功能的应用

摘要

The application of DROOP function of the drive system in the continuous annealing line of MaSteel (Hefei) Steel is introduced and the application effect is analyzed. Cold rolling and continuous annealing line is a heat treatment process for cold rolled steel sheet, in which the strip winds on different rollers in the same tension section. Thus it requires the roller speed must not only follow the reference speed, but also output some load balancing capacity, that is to say, it requires the external characteristics of the speed control system moderately drooping. Therefore, using DROOP function appropriately introduces negative feedback from speed regulator output to input, makes the motor speed to droop when various inverters in the same tension section drive at the same time, and ultimately achieves load balance.%介绍了马钢(合肥)公司冷轧连退线传动系统中DROOP功能的应用,并对传动系统应用的效果进行了分析.冷轧连续退火线是对冷轧薄板的热处理过程,在同一个张力段内,带钢缠绕在不同的辊道上,因此要求辊道转速既能跟随给定速度,又要输出一定的负荷均衡能力,也就是说要求调速系统的外特性适度下垂,因此采用DROOP功能,适当引入从转速调节器输出到输入的负反馈,进而当同一张力段内多台变频器共同驱动时,使电机速度下垂,最终达到负荷平衡.