Adaptive control method and device
A self-adaptive control and self-adaptive technology, applied in the field of electronics, can solve problems such as weak anti-interference ability
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Embodiment 1
[0045] Figure 1a It is a flowchart of an adaptive control method provided in Embodiment 1 of the present invention. The execution subject of this embodiment of the present invention is an active power filter. Refer to Figure 1a , the method includes:
[0046]101: According to the first historical fundamental current and the adaptive finite impulse response algorithm, optimize the coefficients of the adaptive finite impulse response algorithm;
[0047] Wherein, the first historical fundamental current is the fundamental current within a period of time used to optimize coefficients of the adaptive finite impulse response algorithm.
[0048] The adaptive finite impulse response algorithm is a digital signal processing algorithm, which has the functions of signal pre-regulation, frequency band selection and filtering.
[0049] According to the first historical fundamental current and the adaptive finite impulse response algorithm, the fundamental current is predicted, and accord...
Embodiment 2
[0065] Figure 2a It is a flowchart of an adaptive control method provided in Embodiment 2 of the present invention. The execution subject of this embodiment of the present invention is an active power filter. Refer to Figure 2a , the method includes:
[0066] 201: Obtain the first predicted fundamental current according to the first historical fundamental current and the adaptive finite impulse response algorithm;
[0067] The calculation formula of the adaptive finite impulse response algorithm is Among them, k is the sampling interval, is the predicted fundamental wave current at time n+k, N is the length of the data window, X(n)=[x(n), x(n-k),...,x(n-(N-1)k))] is a vector composed of the fundamental current at time n and the historical fundamental current before time n, H′=[h n , h n-1 ..., h N-1 ] is the transpose of the coefficient vector.
[0068] The size of N may be 10, 20, 30, etc., which is not limited.
[0069] The active power filter is based on the fir...
Embodiment 3
[0097] image 3 It is a structural schematic diagram of an adaptive control device provided in Embodiment 3 of the present invention, see image 3 , the device consists of:
[0098] The coefficient optimization module 31 is used to optimize the coefficients of the adaptive finite impulse response algorithm according to the first historical fundamental current and the adaptive finite impulse response algorithm;
[0099] The first fundamental wave current calculation module 32 is used to obtain the first fundamental wave current according to the grid current and the ip-iq algorithm, wherein ip is an active component, and iq is a reactive component;
[0100] The predicted fundamental wave current calculation module 33 is used to obtain at least one predicted fundamental wave current according to the first fundamental wave current, the second historical fundamental wave current, the adaptive finite impulse response algorithm after coefficient optimization, and the interpolation v...
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