Abstract
With the rapid development of the power industry, more and more complex power electronic equipment operate in the power grid system, so that a large number of harmonics are injected into the power grid system. In order to quickly and accurately detect the harmonic current in the power grid, used the basic principle of harmonic detection algorithm based on instantaneous reactive power theory, a unit vector harmonic detection method based on basic instantaneous reactive power theory is proposed and simulated. The simulation results show that the improved harmonic current detection method proposed in this paper has good real-time performance and high detection accuracy, and has a good application prospect in engineering practice.
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