High-temperature gas cooled reactor helium flow control system and method with incremental adjusting function

Abstract

The invention discloses a high-temperature gas cooled reactor helium flow control system and method with an incremental adjusting function. The high-temperature gas cooled reactor helium flow controlmethod comprises the following steps: 1) calculating a hot helium temperature correction value for hot helium temperature PID adjustment; 2) calculating a power correction value for power PID adjustment of a unit; 3) calculating a helium flow correction value for helium flow PID adjustment; and 4) performing three-impulse control according to the hot helium temperature correction value for hot helium temperature PID adjustment, the power correction value for unit power PID adjustment and the helium flow correction value for helium flow PID adjustment, and then controlling the reactor accordingto the result of the three-impulse control. The system and method can rapidly tract and control the change trend of a variable, correct and control the output of the variable to meet the functional requirements of peak regulation and frequency modulation of the reactor tracking power grid load.

Description

technical field [0001] The invention belongs to the field of nuclear energy science and engineering, and relates to a high-temperature gas-cooled reactor helium flow control system and method with an incremental adjustment function. Background technique [0002] The pebble bed high temperature gas-cooled reactor is a nuclear reactor that uses helium as the coolant, and graphite as the reflector material, neutron moderator material and spherical fuel element structural material. During the normal operation of the reactor, the helium coolant is driven by the main helium blower, and flows in the main flow path composed of the reactor pressure vessel, the steam generator shell and the hot gas conduit shell, and the reactor internals. Forced circulation, heat is taken away from the reactor core to raise the temperature, and in the steam generator, the heat is transferred to the secondary loop system through the steam generator to cool down, thus forming a closed cycle. [0003] ...

AI Technical Summary

Problems solved by technology

The control variable is affected by the internal structural properties of the equipment and the external operating conditions. Its control characteristics are nonlinear, and have distribution parameters and time-varying characteristics. At present, it is difficult to achieve precise control.

The cascade control system adopted by the high-temperature gas-cooled reactor has the advantage of being able to reduce the maximum deviation of the control variable and the integral error, but the dynamic adjustment performance needs to be improved when the unit is operating under variable conditions, and the control scheme does not meet the requirements of the reactor to track the load of the power grid. Functional Requirements for Peak FM

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