传统的锅炉水位三冲量控制系统大都采用PID控制，其控制效果还可以进一步提高。
The traditional control mode of three-variable in the drum water level mostly use PID, the effect of it can be improved.
利用递推最小二乘法循环调整P ID参数，并将该控制器应用于锅炉汽包水位三冲量控制系统。
Recursive least square method was used to adjust the parameters of the PID controller, which was applied in three-element control system of boiler drum level.
高负荷时通过改变给水泵转速改变给水量，用三冲量系统控制汽包水位。
At the high load condition, change the rotating speed of steam or electricity feed water pumps to ensure the water level of the drum.
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