Natural gas supercharger switching pressure stabilizing method without additional energy consumption

The invention relates to a natural gas supercharger switching and pressure stabilizing method without additional energy consumption. A natural gas high-pressure buffer tank is arranged between an outlet of a natural gas supercharger and an inlet of a gas module of a gas turbine in parallel; the maximum pressure of the outlet of the natural gas supercharger is the maximum inflation pressure of the natural gas high-pressure buffer tank; in the process that the natural gas working supercharger is stopped and the standby supercharger is started to reach the full load, the natural gas high-pressure buffer tank releases natural gas to maintain stable operation of the gas turbine in the switching time, and the minimum gas storage volume is the minimum buffer volume; calculating the water volume of the natural gas high-pressure buffer tank; a feasible scheme for realizing the buffer volume is provided by calculating the buffer volume, and the stability of the inlet pressure of the gas turbine in the fault switching p