Three-phase dynamic voltage regulator

Abstract

The invention discloses a three-phase dynamic voltage regulator comprising three rectification inverter circuits. An input end of each of the rectification inverter circuits is correspondingly connected to one phase of a three-phase alternating current, and an output end thereof is correspondingly connected to one phase of the three-phase alternating current through a power frequency transformer.A voltage collecting circuit is used for collecting input voltage data on a load side, an output end of the voltage collecting circuit is connected to a control unit, and an output end of the controlunit is connected to each of the rectification inverter circuits. The three-phase dynamic voltage regulator has the advantages that one phase in the three-phase alternating current is precisely adjusted by setting one rectification inverter circuit for each phase of the three-phase alternating current to perform voltage adjustment, the voltage adjustment is more accurate, the electrical energy quality of a power grid is optimized, and the influence of a voltage fluctuation in a grid on the power supply is avoided.

Description

technical field [0001] The invention relates to the field of electric energy conversion and control in power electronics, in particular to a three-phase dynamic voltage regulator. Background technique [0002] With the progress of society and the development of science and technology, people's living standards have been greatly improved. Among them, the rapid development of electronic products has greatly changed people's lifestyles. At the same time, it has also brought new challenges to the power quality of the grid. Problems. At present, power quality problems mainly include system voltage sag problems, power factor problems, three-phase unbalance problems and harmonic problems. For these problems, the current market has corresponding solutions, such as dynamic voltage regulators (DVR), static wireless Power compensation generator (SVG), and active power filter (APF), etc., but although the adjustment precision and accuracy of the voltage regulator in the prior art have r...

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Problems solved by technology

[0002] With the progress of society and the development of science and technology, people's living standards have been greatly improved. Among them, the rapid development of electronic products has greatly changed people's lifestyles. At the same time, it has also brought new challenges to the power quality of the grid. Problems. At present, power quality problems mainly include system voltage sag problems, power factor problems, three-phase unbalance problems and harmonic problems. For these problems, the current market has corresponding solutions, such as dynamic voltage regulators (DVR), static wireless power compensation generator (SVG), and active power filter (APF), etc., but although the adjustment precision and accuracy of the voltage regulator in the prior art have reached a certain level, there is still room for improvement

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