Alstom能源技术中心给出了气化炉在全工况下的Matlab非线性模型。为了解决Alstom气化炉非线性、强耦合以及大惯性特点所带来的控制问题,设计了一种模型预测控制器。首先在局部工况点建立离线线性模型,在所建模型基础上设计控制器,应用灰色理论GM(1,1)在误差校正环节预测未来时刻由于模型不匹配产生的误差,以此来提高控制器输出的精度。仿真结果表明,在压力扰动测试中,即使各控制量受到严格的约束,各输出量的偏差仍能维持在规定的范围内,满足了Alstom气化炉的控制要求。%Alstom Energy Technology Center has given the Matlab nonlinear model for gasifier under full operating condition. In order to solve the control problem caused by the non-linearity, tight coupling and large inertia of the gasifier from Alstom, the model predictive controller has been designed. Firstly, the off line linear model is set up under some of the local operating conditions, then on the basis of the model established, the controller is designed. By adopting grey theory GM(1,1), in the error correction stage, the error that generated due to model mismatch in future is predicted, thus the accuracy of controller output is enhanced. The simulation results indicate that in pressure disturbance tests, even control variables are given strict constraints, the deviation of each variable still keeps within a predetermined range;this satisfies the control requirements for Alstom gasifier.
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