针对蒸汽发生器负荷扰动恶劣、运行工况多变以及虚假水位效应导致的控制性能恶化问题，提出了一种蒸汽发生器水位自适应滑模控制策略。基于可移动边界理论，建立了蒸汽发生器非线性动态模型，分离出了蒸汽发生器水位、蒸汽流量和给水流量的对应关系，设计了一阶积分滑模面和滑模控制律，在此基础上考虑了水位测量误差影响，设计了水位自适应估计律，根据李雅普诺夫理论验证系统稳定性，通过仿真测试表明所设计的蒸汽发生器水位自适应滑模控制策略具有更优的性能，水位最大超调量和稳态控制偏差均最小，分别为1.3%和0.1%，具备应对工况变化和负荷扰动的适应能力，提升了自适应滑模控制系统的变工况响应能力和抗扰动鲁棒性。

In response to the problems of poor control performance caused by severe load disturbances, variable operating conditions, and false water level effects in steam generators, a self-adaptive sliding mode control strategy for steam generator water level is proposed. Based on the theory of movable boundaries, a nonlinear dynamic model of the steam generator is established, and the corresponding relationship between the steam generator water level, steam flow rate, and feedwater flow rate is separated. A first-order integral sliding mode surface and sliding mode control law are designed. On this basis, considering the impact of water level measurement errors, a self-adaptive estimation law for water level is designed. The stability of the system is verified according to Lyapunov theory. Simulation tests show that the self-adaptive sliding mode control strategy for steam generator water level designed has better performance. The maximum overshoot of water level and steady-state control deviation are the smallest, which are 1.3% and 0.1% respectively. It has the ability of adapting to changes in operating conditions and load disturbances, improving the response ability and robustness of the self-adaptive sliding mode control system under varying operating conditions.

TP273