Reactive power, unbalanced and harmonic detection method based on SDFT algorithm
An algorithm and balanced technology, applied in reactive power/actual component measurement, calculation, complex mathematical operation, etc., which can solve the problems of accumulation of errors and the inability of operation errors to cancel each other.
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[0052] The core of the present invention is to provide a method for detecting fundamental reactive power, three-phase unbalance and harmonics based on SDFT algorithm. cumulative error.
[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, 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.
[0054] Figure 4 It is a flow chart of the fundamental reactive power and unbalanced current detection method provided by the embodiment of the present invention, the method includes:
[0055] S100. Sampling the three-phase current signal at a sampling frequency a...
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