斩波串级调速双闭环控制器参数的工程计算

Engineering Calculation of Double Closed-loop Controller Parameters of Chopper Cascade Speed System

根据斩波串级调速系统稳态情况下的主回路特性与系统调速、机械特性建立其状态空间平均法下的微分方程;并在此基础上应用二阶、三阶工程最佳法结合工程实际情况,详细推导斩波串级调速系统双闭环控制器参数的工程计算方法。根据此工程计算方法设计的双闭环控制斩波串级调速系统在多条旋窑水泥生产线的高温风机中得到实际应用,相比于传统的串级调速,该系统能更好的控制直流母线电流,提高系统的可靠性和动态性能,有效解决高温风机由于"塌料"导致的跳闸停运、生产中断等问题。

According to main circuit characteristics of chopper cascade control system under steady state, and system speed characteristics, mechanical characteristics, differential equations of main circuit of chopper cascade control sys- tem is established under state-space averaging method.Using the second-order and third-order engineering best me- thod combined with practical engineering, engineering calculations method of double closed-loop controller parameters of chopper cascade speed system is derived.Double closed-loop controller of chopper cascade speed system is de- signed under this engineering calculation approach, and is used in high-temperature fan of rotary kiln cement produc- tion line.Compared to the traditional cascade speed system, the DC bus current is better controlled.The reliability and dynamic performance of chopper cascade speed system is improved, and ＂collapse material＂ leading to trip outage of high-temperature fan, production interruptions and other issues are effectively solved.