【摘要】 针对连续循环曝气系统(CCAS)污水处理中溶解氧浓度控制存在的实时性差、溶解氧浓度波动范围偏大、运行费用较高等问题,建立溶解氧DO环、速度环和电流环组成三闭环的系统模式,达到对溶解氧的稳定控制。以TMS320LF2812作为主控芯片,通过对风机施以FOC的矢量变频调速控制以控制风机的鼓风量;同时对溶解氧施以Smith预估补偿控制,消除对溶解氧控制的滞后,提高系统的鲁棒性。在不同阶段溶解氧参数稳定效果好,出水水质指标明显提高。系统具有良好的动态性能,系统硬件电路简单经济、性价比高,有较高的实用价值。更多还原

【Abstract】 Directing at the defects of dissolved oxygen(DO) control in continuous cycle aeration system(CCAS) process such as poor real-timeliness,wide DO variation range,high operating cost,and so on,a 3-loop mode system was established,which included DO loop,speed loop,and current loop,to accomplish stable DO control.A TMS320LF2812 was used as the core.The system accomplished a FOC vector inverter speed adjustment in fan flow control,and a Smith predictor control eliminated the DO control lag,enhanced the robustness.The DO parameter is controlled as desired in the process,the outflow water quality was improved significantly.The system features favorable dynamic performance,simple,economic high performance-price ratio,and high practical utility.更多还原