Please tell me about three-impulse cascade control of drum water level.
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I will send the picture to you for discussion. Regarding the adjustment of PID parameters for the three-impulse cascade control of drum water level, the current adjustment is not very stable. The second picture shows the water level set value, water level tracking and regulating valve position.
We will soon face this problem as well.
Personally, I feel that the flow fluctuations of your external steam supply are not small. If there are no other external interferences in the above picture, such as steam flow, continuous discharge, fixed discharge, etc., it may be that the system capacity is large and lagging behind, and differentials should be added. In addition, from the picture, the proportional effect is not strong and needs to be adjusted.
The integral effect is inappropriate. The integration time should be increased and the integral effect should be weakened.
Is it the main key or the secondary key that is being adjusted?
Is it the main key or the secondary key that is being adjusted?
This post was last edited by jlshnlhj on 2022-3-14 16:15. The integration time of the main tune has increased, and the trend of the secondary tune is difficult to determine.
What software does this logic?
Of course, the main process and the secondary process are fast processes, and generally the parameters are not a big problem.