YT Patent introduction: Harmonic detection and compensation method and system for Active Power Filter

The existing power grid is usually equipped with a large number of nonlinear electronic components. These nonlinear electronic components will generate corresponding harmonics during the working process, among which high-order harmonics will interfere with the electrical equipment in the power grid and seriously affect the power supply. Power quality in the grid. In order to reduce the adverse effects of high-order harmonics on the operation of the power grid, an Active Power Filter (APF) is usually installed in the power grid, so that the Active Power Filter (APF) is used to filter the harmonics generated by nonlinear electronic components, but The above method can only perform uniform harmonic filtering for all electronic components, and it cannot perform personalized filtering for the harmonic generation of different nonlinear electronic components, which not only increases the harmonic filtering of the Active Power Filter APF workload, while also reducing the harmonic filtering efficiency of nonlinear electronic components.

The patent of the present invention provides a harmonic detection and harmonic compensation method and system for an Active Power Filter, which judges the load by detecting and analyzing the distribution state of the harmonic current in the operating current of the load connected to the active power filter Whether it is a harmonic source, and then according to the output power state of the load belonging to the harmonic source, determine its corresponding harmonic component information, and then instruct the Active Power Filter to extract different harmonic components and perform adaptive correction and compensation. The active power filter can perform adaptive filtering processing for the harmonic generation of different types of loads, thereby reducing the harmonic filtering workload of the active power filter and improving the harmonic filtering efficiency of the Active Power Filter.

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