Robust power control design for a small pressurized water reactor using an H infinity mixed sensitivity method
Robust power control design for a small pressurized water reactor using an H infinity mixed sensitivity method
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采用 H 无穷大混合灵敏度法的小型压水堆鲁棒功率控制设计
DOI：
10.1016/j.net.2019.12.031
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发表时间：
2020-07-01
影响因子：
2.7
通讯作者：
Zhao, Fuyu
中科院分区：
文献类型：
--
作者：
Yan, Xu;Wang, Pengfei;Zhao, Fuyu
本研究的目的是为小型压水堆（PWR）设计鲁棒的功率控制系统，以在外部干扰和内部模型不确定性的条件下实现稳定的功率运行。为此，根据点堆动力学方程和曼热力学模型推导了堆芯在五个功率水平下的多输入多输出传递函数模型。利用传递函数模型，使用H无穷大（H-infinity）混合灵敏度方法设计了五个本地反应堆功率控制器，以分别在五个功率水平的各种不确定性下最小化堆芯功率扰动。然后采用具有三角隶属函数的多模型方法将五个本地控制器集成到适用于整个功率范围的多模型鲁棒控制系统中。鲁棒电源系统的性能根据 10% 的全功率 (FP) 阶跃负载增加瞬态进行评估，其中包括不同功率水平下的冷却剂入口温度扰动以及大范围、快速斜坡负载变化瞬态。仿真结果表明，鲁棒控制系统在外部扰动和内部模型不确定性的情况下仍能保持令人满意的控制性能，并且反应堆具有良好的鲁棒性，证明了鲁棒功率控制设计的有效性。 (C) 2020 年韩国核学会，由 Elsevier Korea LLC 出版。
The objective of this study is to design a robust power control system for a small pressurized water reactor (PWR) to achieve stable power operations under conditions of external disturbances and internal model uncertainties. For this purpose, the multiple-input multiple-output transfer function models of the reactor core at five power levels are derived from point reactor kinetics equations and the Mann's thermodynamic model. Using the transfer function models, five local reactor power controllers are designed using an H infinity (H-infinity) mixed sensitivity method to minimize the core power disturbance under various uncertainties at the five power levels, respectively. Then a multimodel approach with triangular membership functions is employed to integrate the five local controllers into a multimodel robust control system that is applicable for the entire power range. The performance of the robust power system is assessed against 10% of full power (FP) step load increase transients with coolant inlet temperature disturbances at different power levels and large-scope, rapid ramp load change transient. The simulation results show that the robust control system could maintain satisfactory control performance and good robustness of the reactor under external disturbances and internal model uncertainties, demonstrating the effective of the robust power control design. (C) 2020 Korean Nuclear Society, Published by Elsevier Korea LLC.