Multi-model intelligent optimizing prediction control method for boiler loads under low-load condition
A boiler load and predictive control technology, applied in the control system, steam generation, lighting and heating equipment, etc., can solve the problems of dynamic characteristic changes, difficult control, controlled process lag and inertia increase, etc.
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[0057] This implementation provides a multi-model intelligent optimization and predictive control method for boiler load under low load, including:
[0058] Step 1. Select a typical load point to establish a controlled object model. The method is to do a step response test at each load point to obtain the input and output data and get the controlled object transfer function G(s).
[0059] Step 2. Design the predictive controller according to the controlled object model at each load point, the method is as follows: according to the object transfer function, obtain the controllable autoregressive integral moving average (CARIMA) model,
[0060]
[0061] Among them, A(q -1 ), B(q -1 ) is the coefficient polynomial, ξ(k) is a random sequence, representing random noise, y(k) is the output sequence, u(k) is the input sequence, Δ=1-q -1 is a difference operator.
[0062]
[0063] By introducing the Diophantine equation,
[0064]
[0065] Among them, E(q -1 ), F(q -1 ),...
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