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对于大时滞、大惯性的加氯过程,本文采用串级控制的结构,很好地满足对水质和流量干扰快速响应的要求,同时在串级回路的主控制器中,创新性的使用耗氯量为水质的间接指标,引入了专家型前馈控制,较其他控制系统大大较低了水质变化对主回路的影响,在副控制回路中引入了自整定模糊PID控制,提高了副回路的控制效果。系统在南京市上元门投入运行后,不仅使该厂出厂水余氯指标的合格率达到100%,同时较低了生产成本。
For large time-delay, high inertia chlorination process, this article uses a cascade control structure, to meet the water quality and flow disturbance quickly respond to the requirements, while the main loop controller in the cascade, the innovative use of consumption Chlorine is an indirect indicator of water quality, the introduction of expert-type feedforward control, compared with other control systems greatly lower the impact of water quality changes on the main loop in the secondary control loop introduced a self-tuning fuzzy PID control to improve the secondary loop Control effect. After the system was put into operation in Shangyuan Gate of Nanjing City, the system not only made the pass rate of residual chlorine in factory water reach 100%, but also reduced the production cost.