摘要
分析主汽温控制策略的利弊,针对主汽温控制难点利用TOCS(终端操作控制系统)引入模糊控制和神经网络控制对主汽温控制策略进行优化,通过精确计算锅炉各级减温器所需最佳给水量对锅炉汽水系统各级过热器壁温进行控制;减温水是防止过热器壁管超温的重要控制手段,通过协调锅炉过热器减温水量,在保证各级过热器所有金属壁温度不超温的前提下,优化水汽系统温度分布,使锅炉在最优经济工况下安全稳定运行。
Advantages and disadvantages of the main steam temperature control strategy are analyzed in this paper. According to difficulties of the main steam temperature control, the main steam temperature control strategy is optimized using the fuzzy control and neural network control of TOCS. Wall temperatures of superheaters are controlled for the boiler steam & water system by calculating best feedwater quantities of boiler attemperators accurately. Desuperheating water is an important control instrument in preventing overheating of the superheater. Under the premise of no overtemperature for wall temperatures of all superheaters, water vapor temperature distribution is optimized to ensure the safe and stable operation of the boiler under the optimal and economic condition.
引文
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