Coordinated control method for supercritical thermal power units with fusion expansion observer
A thermal power unit, coordinated control technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem of inability to deal with unknown disturbance and dynamic uncertainty of the unit, and achieve the effect of ensuring stable tracking in a large range
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[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.
[0047] The controller control quantity that the present invention proposes is made up of two items, is represented by following formula:
[0048] u(k)=u mpc (k)+u ESO (k); (11)
[0049] where u mpc (k) is the multi-model predictive control item, whose function is to drive the output of the unit to a given target value, which is given by the multi-model predictive control algorithm. u ESO (k) is the disturbance compensation item, whose function is to compensate the disturbance and uncertainty in each control channel of the unit, and eliminate the steady-state error of the system. It is calculated based on the relevant state quantities of the extended state observer.
[0050] cost function
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[0052] Among them, ...
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