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An Improved Repetitive Controller Harmonic Suppression Method

A repetitive controller and harmonic suppression technology, applied in harmonic reduction devices and AC networks to reduce harmonics/ripples, etc., can solve problems such as the unusable repetitive controller and the transmission of transformer inverter output.

Active Publication Date: 2021-10-29
深圳市盈科互动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since the repetitive control has a control effect on the DC component, the fundamental wave, and the multiple frequency signals of the fundamental wave of the controlled object, the transformer can effectively isolate the DC, zero-sequence and other voltage components and cannot transmit the inverter output to the secondary side, so repeating controllers cannot be used in the above products with isolation transformers

Method used

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  • An Improved Repetitive Controller Harmonic Suppression Method
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Embodiment Construction

[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all those skilled in the art can obtain without creative work. Other embodiments all belong to the protection scope of the present invention.

[0021] The purpose of the present invention is to provide a repetitive controller harmonic suppression method that can be realized in the application of power electronic variable current control with an isolation transformer, which expands the application field of the repetitive controller and makes up for the inability of the repetitive control in this occasion. Technical flaws ...

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Abstract

The invention discloses a method for suppressing harmonics of a repetitive controller that can be applied to power electronic variable current control applications with an isolation transformer, expands the application field of the repetitive controller, and makes up for the fact that the repetitive control cannot be realized in this occasion in the past Technical flaws in harmonic compensation and waveform correction. The invention can be widely used in the field of PWM harmonic suppression control of UPS, photovoltaic inverters, energy storage converters and other power electronic equipment with isolation transformers.

Description

technical field [0001] The invention belongs to the technical field of power electronic variable current control and harmonic suppression, and in particular relates to a harmonic suppression method for an improved repetitive controller with output of an isolation transformer. Background technique [0002] Due to its excellent harmonic suppression ability, repetitive controllers are widely used in uninterruptible power supply (UPS), energy storage converter (PCS), photovoltaic inverter (Solar Inverter), static var generator (SVG), Active power filter (APF) and other power electronic equipment in the field of current conversion control, waveform correction and harmonic suppression control of power electronic power devices. [0003] However, since the repetitive control has a control effect on the DC component, the fundamental wave, and the multiple frequency signals of the fundamental wave of the controlled object, the transformer can effectively isolate the DC, zero-sequence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 胡剑敏
Owner 深圳市盈科互动科技有限公司