Active filter device based on wireless sensing technology

Abstract

The invention relates to an active filter device based on a wireless sensing technology. The active filter device comprises a mutual inductor, a digital signal processor and an inverter, wherein the inverter is connected with the digital signal processor, a wireless sensing sampling converter is installed on the mutual inductor, a wireless receiver is connected to the digital signal processor, the wireless sensing sampling converter comprises an internal acquisition conversion circuit and a wireless sending circuit which are connected, and the wireless sending circuit is connected with a wireless receiver through a wireless network; the wireless sensing sampling converter converts the sampling signal acquired from the mutual inductor to a digital signal and sends out the digital signal through the wireless network, the wireless receiver receives the digital signal and then transmits the digital signal to the digital signal processor, and the digital signal processor controls the output of the inverter according to the received signal. Compared with the prior art, the active filter device disclosed by the invention has the advantages of being low in transmission interference, long in transmission distance, and the like.

Description

technical field [0001] The invention relates to an active filter device, in particular to an active filter device based on wireless sensor technology. Background technique [0002] The application of active filtering devices can overcome the shortcomings of traditional harmonic suppression and reactive power compensation methods such as LC filters (traditional compensation can only be fixed), realize dynamic tracking compensation, and can complement both harmonics and reactive power. The active filtering device needs to have a set of sampling signal input (transformer) when in use, and use this signal to analyze the harmonics of the measured current so as to control the inverter to output opposite and equal harmonics to offset and compensate them. In practical applications, the quality of the sampling signal determines the compensation effect and the stability of the equipment. In many on-site sampling sources (the location where the transformer is installed) to the filter, ...

AI Technical Summary

Problems solved by technology

In practical applications, the quality of the sampling signal determines the compensation effect and the stability of the equipment. In many on-site sampling sources (the location where the transformer is installed) to the filter, the distance is very long (more than 30 meters), and many have power lines. There is a chance of cable interference, so the final sampled signal has a high degree of distortion

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