Dynamic compensation method for harmonic current of power grid based on wavelet transformation
A fundamental wave current, wavelet transform technology, applied in AC network to reduce harmonics/ripple, harmonic reduction device and other directions, can solve the harmonic detection lag, the wavelet transform harmonic detection dynamic performance is poor, the dynamic detection accuracy is reduced And other issues
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[0058] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0059] Such as figure 1 Shown is the method flow chart of the present invention, specifically comprises the following steps:
[0060] Step 1: Perform data sampling on the grid current to obtain a discrete signal of the grid current, such as figure 2 shown;
[0061] The data sampling of the grid current described in step 1 is specifically as follows:
[0062] Grid current sampling frequency is f s = 9.6kHz for sampling to obtain the grid current discrete signal x N , discrete signal x N The highest frequ...
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