比例—滞后(PL)液面调节器是为了进一步提高“炼油化工自动化”中液面—流量系统的控制质量而提出的一种新型液面调节器,由一个滞后环节的前馈控制同一个反馈式的比例(P)液面调节器组成。它既有比例液面调节器稳定流出量的特点,又有比例—积分(Pl)液面调节器使液面能消除剩余偏差的优点。更重要的是补偿了比例积分调节器的动态特性,不但在流量出现阶跃干扰时流出量波动平缓,而且液面与流出量的变化成比例,保证了物料在反应器内停留时间的恒定。其结构简单、参数整定较方便,在实际生产中应用对提高产品质量、降低消耗定额和提高设备效率,都将起一定的作用。 Proportional-hysteresis (PL) level regulator is a new type of level regulator proposed to further improve the control quality of the level-flow system in Refining and Chemical Automation. The feedforward control of one hysteresis loop controls the same feedback The proportional (P) level regulator. It not only has the characteristics of stable output of proportional liquid level regulator, but also has the advantages of proportional-integral (Pl) liquid level regulator to eliminate residual deviation of liquid level. More importantly, the dynamic characteristics of the PI regulator are compensated. Not only is the outflow fluctuated gently when the flow step disturbance occurs, but also the liquid level is proportional to the outflow rate, which ensures the constant residence time of the material in the reactor. The structure is simple, the parameter setting is more convenient, and the application in actual production will play a certain role in improving the product quality, reducing the consumption quota and improving the equipment efficiency.