Abstract

The micro-high-temperature gas-cooled reactor with helium Brayton cycle (Mi-HTR) can be used as a portable micro mobile nuclear power supply. The nonlinear model based on differential equation makes it difficult to reveal the relationship between the internal state of Mi-HTR and the external input and output variables. Based on the operating principles, laws, and theorems, the nonlinear dynamic model between various parameters and external effects in the system is established. According to the nonlinear dynamic model, the state space model of Mi-HTR is obtained by theoretical derivation. The established state space model can describe the relationship between internal intermediate variables. The disturbances with the same boundary conditions are introduced into nonlinear dynamic model and state space model respectively. The accuracy of the established Mi-HTR state space model is proved. The Mi-HTR state space model provides an analytical tool for the design of Mi-HTR control system.

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