以山西某电厂350 MW超临界CFB机组为研究对象，对其储水罐水位控制系统进行了研究和优化。针对储水罐内部水位波动幅度大的缺陷，设计了前馈串级复合控制系统对原有储水罐水位控制系统进行了改进，并进行扰动仿真实验。仿真结果表明，在遇到扰动时改进后的控制系统相比原有控制系统超调量降至3.2%，调节时间降至12 min，表现出很强的抗扰能力。

Taking a 350 MW supercritical CFB unit in a power plant in Shanxi as the research object,the water level control system of its water storage tank was studied and optimized.Aiming at the defect of large fluctuation range of water level inside water storage tank,a feedforward cascade composite control system was designed to improve the original water level control system of water storage tank,and the disturbance simulation experiment was carried out.The simulation results show that compared with the original control system,the improved control system can reduce the overshoot to 3.2% and the adjustment time to 12 min in case of disturbance,showing a strong antidisturbance ability.

TK221

国家自然科学基金（U1610116）