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Load following control system design for micro-high-temperature gas-cooled reactor with helium Brayton cycle

Author

Listed:
  • Qiu, Leilei
  • Zhang, Ru
  • Liao, Shengyong
  • Fan, Sui
  • Sun, Peiwei
  • Wei, Xinyu

Abstract

The micro-high-temperature gas-cooled reactor with a direct helium Brayton cycle (Mi-HTR) is an ideal choice for micro-mobile nuclear power sources, but its load-following capability is constrained by strong system nonlinearities and coupling effects. To address the challenge, a nonlinear coordinated control system is developed. Firstly, a model of the Mi-HTR is established and verified. And, a steady-state operation scheme is designed to provide setpoint references for the control systems. A control system is designed and verified. The simulation results show that key system parameters have excessive overshoots and prolonged adjustment times. Subsequently, the turbine inlet helium pressure is introduced as a coordinating variable, and a coordinated control system is designed and optimized. Compared with the control system without considering coordination, the coordinated control system based on signal fusion reduced the overshoot of reactor power and electric power by 16.57 % and 23.57 %, respectively, and shortened the settling time by 59.4 % and 79.54 %, respectively. Finally, based on the gain-scheduling method, the membership functions of controllers are obtained using an ant colony algorithm, and a nonlinear coordinated control system is designed to achieve load-following control and coordinated operation.

Suggested Citation

  • Qiu, Leilei & Zhang, Ru & Liao, Shengyong & Fan, Sui & Sun, Peiwei & Wei, Xinyu, 2026. "Load following control system design for micro-high-temperature gas-cooled reactor with helium Brayton cycle," Energy, Elsevier, vol. 345(C).
    • Handle: RePEc:eee:energy:v:345:y:2026:i:c:s0360544226002203
    DOI: 10.1016/j.energy.2026.140118
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