Charging flow control method and system for primary loop voltage stabilizer of nuclear power plant

The invention discloses a charging flow control method and system for a loop voltage stabilizer of a nuclear power plant. The method comprises the following steps: S1, acquiring a liquid level measurement value of the voltage stabilizer; s2, performing first PI adjustment or first PID adjustment based on a first difference value between a liquid level setting value and a liquid level measurement value of the voltage stabilizer to generate a first control value; wherein in the process of executing the first PI adjustment or the first PID adjustment, the integral term of the first PI adjustment or the first PID adjustment is subjected to output limit value processing according to the charging flow limiting range of the voltage stabilizer; s3, performing liquid level control processing according to the first control value to generate a valve control instruction for controlling the charging flow of the pressure stabilizer, and returning to S1; according to the invention, the regulator can be prevented from enteri