A multi-module parallel large-capacity active filter control system and its implementation method

Abstract

The invention discloses a permanent magnet power device, mainly solves the problem that a current active filter cannot meet the actual application requirement of high-power loads due to capacity limitation of parameters of hardware such as power devices, capacitors and reactors in the prior art, and provides a multi-module parallel type high-capacity active filter control system which comprises a master controller, a module group and a switch unit, wherein the optical fiber communication interface of the master controller is connected with the signal port of the module group, and the output end of the module group is connected with the input end of the switch unit; the output end of the switch unit is connected with a power grid and a nonlinear load, and the control end of the switch unit is connected with the control end of the master controller; the module group is formed by connecting multiple module units in parallel, the module units are low-capacity active filters, and the signal ports of the module units are the signal ports of the module group. By adopting the scheme, the multi-module parallel type high-capacity active filter control system achieves the purpose of meeting the actual application demand of high-power loads.

Description

technical field [0001] The invention relates to an active filter control system, in particular to a multi-module parallel large-capacity active filter control system and its realization method. Background technique [0002] The development and application of power electronics technology has effectively promoted the process of modern industrialization, but at the same time it has also brought serious harmonic pollution problems to the power system. As a high-efficiency power electronic device, active filters have significant advantages in harmonic control compared with traditional passive filters, and will gradually become mainstream products for improving power quality. The basic working principle of the conventional active filter is to extract the harmonic current from the load current, and the compensation device generates a compensation current equal in size and opposite in direction to the harmonic current, so that the grid current is the standard fundamental current. ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-module parallel large-capacity active filter control system and its implementation method, which mainly solves the capacity limitations of hardware parameters such as power devices, capacitors, and reactors in the prior art. There is a problem that active filters cannot meet the actual application requirements of high-power loads

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