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Active-disturbance-rejection control method and system for suppressing voltage fluctuation of direct-current micro-grid

A technology of active disturbance rejection control and DC microgrid, which is applied in the general control system, control/regulation system, adaptive control, etc., can solve problems such as hysteresis, precision control is not suitable for occasions, feedback adjustment overshoot, etc. Achieve the effects of increasing anti-disturbance ability, increasing anti-disturbance ability and improving dynamic characteristics

Pending Publication Date: 2022-01-04
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +2
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Problems solved by technology

The traditional PI control performs feedback adjustment through the error of the system output, which has a certain hysteresis, and the feedback adjustment may have problems such as overshoot, which is not suitable for some occasions that require precise control.

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  • Active-disturbance-rejection control method and system for suppressing voltage fluctuation of direct-current micro-grid
  • Active-disturbance-rejection control method and system for suppressing voltage fluctuation of direct-current micro-grid
  • Active-disturbance-rejection control method and system for suppressing voltage fluctuation of direct-current micro-grid

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Embodiment Construction

[0056] 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 some of the embodiments of the present invention, but not all of them. 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.

[0057] In the description of the present invention, it should be understood that the terms "comprising" and "comprising" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or more other features, Presence or addition of wholes, steps, operations, elements, components and / or collections thereof.

[0058] It should also be understood that the terminology used in the descriptio...

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Abstract

The invention discloses an active-disturbance-rejection control method and system for suppressing voltage fluctuation of a direct-current micro-grid. The method comprises the following steps: constructing a small-signal model based on an energy storage DAB converter; establishing a disturbance equation of voltage outer loop control; according to the small signal model and the disturbance equation, establishing a voltage control outer ring taking an active disturbance rejection controller as a core; obtaining the duty ratio d of the next moment through a voltage control outer ring; and carrying out voltage amplitude adjustment on the bus observation voltage value vo of the direct-current micro-grid according to the duty ratio d at the next moment to realize active-disturbance-rejection control.

Description

technical field [0001] The invention belongs to the technical field of medium and low voltage direct current microgrids, and in particular relates to an active disturbance rejection control method and system for suppressing voltage fluctuations of direct current microgrids. Background technique [0002] Electrification plays an important role in the production, life and economic development of human society. At present, basic human activities are inseparable from electricity supply, such as lighting, heating, computers, and the use of household appliances. Electricity has also become one of the national poverty indicators. With the rapid development of power electronics and distribution network, the traditional power grid is facing great challenges. On the one hand, in order to alleviate the development of environmental pollution caused by chemical energy, new energy sources such as photovoltaics and wind power have attracted the attention of many scholars. On the other h...

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Application Information

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IPC IPC(8): H02J1/00G05B13/04
CPCH02J1/00G05B13/042Y02E60/60
Inventor 刘翼肇雷达李胜文张伟赵金杨洋王浩羽王翌琛韩彭伟
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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