Converter reactive power control method and system based on virtual synchronous generator model

A generator model and virtual synchronization technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, circuit devices, etc., can solve problems such as unbalanced power grid or load negative sequence reactive power support

Active Publication Date: 2016-03-30
XUJI GRP +4
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a converter reactive power control method based on a virtual synchronous generator model to solve the problem that the existing control strategy based on a virtual synchronous generator cannot provide corresponding negative sequence reactive power support for unbalanced power grids or loads The problem

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  • Converter reactive power control method and system based on virtual synchronous generator model
  • Converter reactive power control method and system based on virtual synchronous generator model
  • Converter reactive power control method and system based on virtual synchronous generator model

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Embodiment Construction

[0060] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0061] The present invention aims at the problem that the power electronic converter in the conventional control mode cannot provide the moment of inertia, and the existing control strategy based on the virtual synchronous generator cannot provide corresponding negative sequence reactive power support for the unbalanced power grid or load, and proposes a virtual synchronous power generation based on The negative-sequence reactive power control method of the machine technology enables the power electronic converter to also have the ability to actively adjust the distribution network under the condition of the grid or unbalanced load.

[0062] Embodiment of the present invention based on the virtual synchronous generator model converter reactive power control method

[0063] The overall control strategy adopted by the present invention is as f...

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Abstract

The invention relates to a converter reactive power control method and system based on a virtual synchronous generator model, and belongs to the technical field of power grid control. The invention combines a power control technology based on a virtual synchronous generator and a current loop control technology based on a positive and negative sequence d-q dual-rotation coordinate system, and discloses a negative sequence reactive power control method under the condition that a power grid or a load is asymmetric. According to the converter reactive power control method and system based on the virtual synchronous generator model, power grid adaptability and operation stability of a converter are promoted, supporting on a grid connection point voltage is effectively assisted in, and quality of the grid connection point voltage is improved.

Description

technical field [0001] The invention relates to a converter reactive power control method and system based on a virtual synchronous generator model, belonging to the technical field of power grid control. Background technique [0002] As intermittent clean energy such as photovoltaics and wind power accounts for an increasing proportion of electric energy, its grid-connected system has a non-negligible impact on the safe operation of the distribution network, and new energy grid-connected technologies have gained Lots of attention. The power electronic converter with conventional control mode is different from the traditional synchronous generator set, it cannot provide the moment of inertia, it cannot provide damping for the weak power grid, and thus it cannot provide voltage and frequency support for the distribution network. Drawing on the operating characteristics of traditional synchronous generators, the control strategy of power electronic converters based on virtual...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCH02J3/18H02J2203/20Y02E40/30
Inventor 肖飞王林张海龙黄辉曹建博
Owner XUJI GRP
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