Drum three-pulse
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How to put the drum three-pulse control into use?
The water supply volume, drum liquid level, and steam generation rate are not stable during operation; it is recommended that, when a certain intermediate value is maintained for the water supply volume, the steam generation rate can be disregarded, and any amount of steam generated should be released entirely. The water supply volume and the gas generation volume should be consistent; cascade control using the water supply volume and the liquid level is employed
It seems there’s some relationship among the three you mentioned; which one’s output, when added to another’s, equals yet another one?
The three types of impulse control are feedforward control and cascade control; when in use, cascade control for the drum level and feedwater is activated first, followed by feedforward control for steam generation.