Multi-model predictive control design method for coordinated control system of supercritical thermal power units
A technology for coordinating control systems and thermal power units, applied in general control systems, control/regulation systems, electrical program control, etc., and can solve problems such as heavy computational load, complex controller structure, and difficult engineering applications.
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[0083] Considering that the dynamic characteristic relationship between each sub-circuit in the coordination system is a self-balancing process but there are some inverse response characteristics, a perfect second-order model is used to simplify the controlled process, the model has zero points, and the coordination object of the supercritical thermal power unit A 3×3 multi-input and multi-output object can be used, and the range of local load point cells can be represented by the model shown in formula (1):
[0084]
[0085] In formula (1), k ij (i, j=1, 2, 3) is the gain coefficient, T ij (i,j=1,2,3), T abc (a, b=1,2,3; c=1,2) is the time constant, τ ij (i, j=1, 2, 3) is the delay time, and S is the Laplacian operator. Based on formula (1), the estimated prediction of the coordinated system output can use the following expression:
[0086]
[0087] In formula (2), y 1 (s), y 2 (s), y 3 (s) is the system output, u 1 (s), u 2 (s), u 3 (s) is the system input. ...
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