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Zero-dynamic DC output voltage control method and system of current source converter

A technology of DC output and output voltage, applied in the field of converters, can solve problems such as damage, shutdown of electrical equipment, affecting the quality of output power supply, etc., to achieve the effect of stabilizing DC output voltage, simple implementation process, and improving power supply quality

Active Publication Date: 2020-05-19
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution is only suitable for unbalanced grid voltage. When the grid voltage drops, the solution still has the dynamic adjustment of DC output voltage, which will affect the quality of output power supply and cause the shutdown or even damage of electrical equipment.

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  • Zero-dynamic DC output voltage control method and system of current source converter
  • Zero-dynamic DC output voltage control method and system of current source converter
  • Zero-dynamic DC output voltage control method and system of current source converter

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] The purpose of the present invention is to provide a zero dynamic DC output voltage control method and system of a current source converter, so as to realize zero dynamic adjustment of the DC output voltage in the case of a balanced or unbalanced drop in the grid voltage and improve the efficiency of current source conversion. power supply quality of the device.

[0056] In order to make the above objects, features and advantages of the present inventio...

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Abstract

The invention discloses a zero-dynamic DC output voltage control method and system of a current source converter. According to the invention, a power grid voltage feedforward control item and a DC side output current feedforward control item are effectively calculated through the instantaneous power theory, the small signal model analysis, the superposition theorem and other methods; the zero-dynamic DC output voltage control method of the current source converter is provided on such basis, and by adopting the DC output voltage and power grid voltage feedforward control technology, the methodcan realize stable DC output voltage, and can realize zero-dynamic adjustment of the output voltage under the condition that the power grid voltage fluctuates; furthermore, no matter under the condition of balanced drop or unbalanced drop of the power grid voltage, zero dynamic adjustment of the DC output voltage can be realized by adopting the method, the power supply quality of the current source converter is effectively improved, and the method is simple in implementation process and has a great practical engineering application value.

Description

technical field [0001] The invention relates to the technical field of converters, in particular to a zero dynamic direct current output voltage control method and system of a current source converter. Background technique [0002] Due to the non-linearity, impact and power imbalance characteristics of various loads in the power grid, it may cause voltage fluctuations and flicker in the power grid. In addition, unfavorable weather such as lightning strikes will also cause grid voltage flicker and fluctuations, which will seriously affect the output voltage of the DC side of the current source converter and the quality of the grid current waveform, damage equipment, and increase the time cost and property loss of maintenance equipment. Therefore, it is of great significance to eliminate the influence of the grid voltage disturbance on the converter and realize the stable DC voltage output by the current source converter in the case of the grid voltage fluctuation. [0003] I...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M7/217H02J3/12
CPCH02J3/12H02M7/2173H02M7/219
Inventor 郭小强杨勇
Owner YANSHAN UNIV
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