NATURAL GAS LIQUEFACTION PLANT, AND POWER SUPPLY SYSTEM, CONTROLLER AND OPERATING METHOD THEREOF

摘要

A natural gas liquefaction plant comprises a liquefier (11) for liquefying a natural gas (111) by exchanging heat with refrigerants (135, 145, 155); refrigerant compressors (13, 14, 15) for compressing the refrigerants (134, 144, 154) supplied to the liquefier (11), motors (131, 141, 151) for driving the refrigerant compressors (13, 14, 15), power generation facilities (21-24) for normal operation and a standby power generation facility (25) generating power for driving the motors (131, 141, 151), and a controller (40) for increasing the output from the power generation facilities (21-23) for normal operation other than an operation stoppingmachine (24) when it occurs in the power generation facilities (21-25) for normal operation and actuating the standby power generation facility (25). With such an arrangement, fall in power supply can be controlled upon occurrence of an operation stopping turbine power generation facility.