Controller for diesel upgrading cycle hydrogen machine
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The circulating hydrogen compressor is driven by a turbine to rotate the centrifuge, and it is controlled by the CCC system. There are three controllers on the operation interface: the first is for speed control, which involves adjusting the opening of the steam valve; the second is for controlling the opening of the bypass circulating hydrogen valve; the third is for regulating the mixing of hydrogen in the circulating hydrogen stream. All of these are set to automatic mode. The first controller is easy to understand. As for the second controller, the automatic setting for the anti-surge valve opening is based on the designed outlet pressure of the compressor. Since the system pressure is currently low, how is this controlled? Additionally, the automatic setting for hydrogen mixing is at zero, but the flow rate keeps fluctuating – how is this controlled? Please provide an explanation. . .
The speed should increase automatically when the pressure is low
So how are these three controllers balanced, with the automatic speed control being higher than the rated speed? . .
I’ve seen that in most cases it’s about controlling the speed; the speed determines the flow rate； The anti-surge valve functions as a mechanism to protect the unit
That’s true; first, the speed is adjusted to ensure a sufficient flow rate, and anti-surge protection serves to safeguard the unit. But why is automation set based on pressure, and why is the automatic setting for the hydrogen mixing ratio set at zero? . .
What is the difference between the CCC system and 505?
I don’t know what 505 is like; some people use 505, while we use 3C here. . .
505 is simply a speed control system, equivalent to the SIC speed control loop in CCC; CCC is an integrated control system that includes speed control, anti-stall control, and performance control
We operate the steam turbine units using CCC, and SIS is our interlock system. . .