基于网络的风机防喘振控制系统设计

Design of Fan Anti-surge Control System Based on Network

摘要:

针对某钢厂转炉煤气加压站大风机电机采用工频加变频的恒压闭环运行方式,变频风机极易发生喘振的现象,为了确保大风机稳定、安全的运行,在风机喘振的预防和控制方法上进行改进；采用两台风机同步变频调速与最小极值流量法的模糊PID控制相结合的防喘振控制方法,同步变频调速控制策略有效地预防喘振的发生,最小极值流量法的模糊PID控制策略最大限度的扩大了风机的运行区间,通过MATLAB软件仿真,证明模糊PID的动态响应速度和鲁棒性较常规PID有较大的改良；控制系统通过工业网络完成现场设备和远程的通讯,使控制系统达到高水平的智能自动化。

Abstract:

For a steel converter gas compression station, big fan motor with power frequency and frequency conversion constant pressure closed-loop operation mode, the fan frequency conversion can easily surge phenomenon, in order to ensure the stable, safe operation of the fan, the prevention and control methods to improve on fan surge. Two fans adopt synchronization frequency conversion and minimum maximum flow method combined the surge of the fuzzy PID control method, synchronous frequency control strategy effective in preventing the occurrence of surge, Minimum extremes flow method of fuzzy PID control strategy to the greatest extent expanded the fan operating range, by MATLAB software simulation proved fuzzy PID dynamic response speed and robustness than the conventional PID greater improvement. Control system to complete the field devices and remote communications through industrial networks, the control system to achieve a high level of intelligent automation.