Power generation system

A power generation system comprising:

• a power generation unit configured to generate electric power by consuming a raw material gas that has passed through a gas meter, the gas meter being configured to, if a state where continuously stopping a flow of the raw material gas for a reset period or longer is not performed has continued for a first upper limit period or longer, perform at least one of outputting an abnormality indication signal and blocking the flow of the raw material gas;
• a raw material gas supply device configured to supply the raw material gas to the power generation unit;
• and
• a controller, wherein
• the controller is configured to:
• perform a raw material gas supply operation of supplying the raw material gas from the raw material gas supply device to the power generation unit after stopping extracting electric power from the power generation unit, in a case of performing normal stopping of a power generation operation;
• and
• stop the power generation operation, and stop the raw material gas supply operation until at least the reset period elapses, in a case where gas supply abnormality in which said state continues for a second upper limit period or longer has occurred, the second upper limit period being shorter than the first upper limit period.