Analysis And Control Of LNG Tank Pressure

In LNG terminal, its main function is its peak-shaving function, There isone point to ensure the normal storage and peak-shaving effect and safety ofLNG receiving station, Must ensure that the stability of the controlledpressure of storage tank. As LNG is a new technology in China, The LNGstation’s automatic control technology is continuously improvement. In ourcountry, the tank pressure the original general through the operator manuallyadjusting the BOG compressor load automatic control method of pressurecontrol or periodic, For there are many factors for tank pressure,these controlmethods have some uncertainties and limitations, need to improve.As there are many problems in the tank pressure control systems.In thediscourse the reliability BOG tank pressure as the main line. From the tankpressure causes and control model is established, the first in-depth analysis ofthe reason of tank pressure. Then it narrates design of fuzzy control system ofthe tank pressure control, and according to the transfer function correspondingto different control parameter settings, in the end, comparison and analysis ofthe use of fuzzy control and other control methods in different conditions.Finally, through the fuzzy control technology of LNG Tank pressure, Theoperation of tank pressure is stable and secure. And achieve the demands.