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火电厂燃烧控制系统大延迟,大时间常数的特性,传统协调控制很难快速准确的实现主蒸汽压力的稳定。采用辐射能与热量信号进行信息融合,并设计风煤比优化算法搜索最佳风煤比,可以实现快速响应燃烧率的变化。实验表明,信息融合算法提高了动态响应的快速性,在线调节风煤比优化算法使稳态过程烟气含氧量平均下降了1.09%,燃料比优化前燃烧更充分,给煤量减少了3%～5%,燃烧经济性提高。
Due to the large delay and large time constant of the combustion control system in the power plant, it is difficult for the traditional coordinated control to achieve the stability of the main steam pressure quickly and accurately. The information fusion between radiant energy and heat signal is used, and the optimal ratio of coal to gas is designed to search the optimal ratio of coal to air, so that the response rate of combustion can be quickly changed. Experiments show that the information fusion algorithm improves the speed of dynamic response. On-line adjustment of the coal-to-air ratio optimization algorithm reduces the oxygen content of flue gas by 1.09% on average, and the fuel ratio is more fully burned before optimization and the quantity of coal supplied is reduced by 3 % ~ 5%, improve combustion economy.