Special modular converter for three-phase four-wire active power filter

Abstract

The invention relates to a special modular converter for a three-phase four-wire active power filter, which is equipped with six function modules based on functions: a master control board module, a drive board module, a protection board module, a power output module, an energy storage module and a power module; the different modules achieve the purposes of electrical connection and data communication through corresponding hardware interfaces; and the modules are respectively arranged on special shield plates according to different functions. In the invention, modularization is a very important process for obtaining the high-performance active power filter; the functions of the modules are relatively independent, and each module can be replaced individually, thus facilitating upgrading and expansion of the functions and breakdown maintenance, achieving strong anti-interference ability, high, stable and reliable filtering performance index, convenient and simple installation and wiringand wide application range, and being suitable for requirements of various scenes.

Description

technical field [0001] The invention relates to a converter dedicated to a power filter, in particular to a converter dedicated to a modular three-phase four-wire active power filter. Background technique [0002] At present, in the commonly used three-phase four-wire active power filter, there is usually no converter, and the internal components of the converter are directly placed inside the three-phase four-wire active power filter. Since the three-phase four-wire active power There are both weak and strong currents in the filter, especially the strong currents in the main circuit are harmonic currents. The magnitude and frequency of harmonic currents are not fixed, so strong interference will be generated, which directly affects the load current sampling. The accuracy has a direct impact on the working performance and filtering effect of the whole machine, which will seriously affect the performance index and working stability of the active power filter, and its performa...

AI Technical Summary

Problems solved by technology

[0002] At present, in the commonly used three-phase four-wire active power filter, there is usually no converter, and the internal components of the converter are directly placed inside the three-phase four-wire active power filter. Since the three-phase four-wire active power There are both weak and strong currents in the filter, especially the strong currents in the main circuit are harmonic currents. The magnitude and frequency of harmonic currents are not fixed, so strong interference will be generated, which directly affects the load current sampling. Accuracy has a direct impact on the working performance and filtering effect of the whole machine, which will seriously affect the performance index and working stability of the active power filter, and its performance and stability cannot be effectively controlled

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