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A parameter adaptive method of virtual synchronous generator for direct drive wind power generation

A technology of synchronous generators and virtual synchronization, which is applied in the directions of wind power generation, reduction/prevention of power oscillation, single-network parallel feeding arrangement, etc., and can solve the problems of not fully exerting relevant control coefficients and flexible adjustment

Active Publication Date: 2022-05-24
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] Although the current research on virtual synchronous generators has improved the magnitude and rate of frequency changes, it has not fully utilized the characteristics of flexible adjustment of related control coefficients.

Method used

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  • A parameter adaptive method of virtual synchronous generator for direct drive wind power generation
  • A parameter adaptive method of virtual synchronous generator for direct drive wind power generation
  • A parameter adaptive method of virtual synchronous generator for direct drive wind power generation

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Embodiment Construction

[0030] The method will be described in detail below, and will be described in conjunction with simulation.

[0031] A virtual synchronous generator parameter adaptive method for direct-drive wind power generation. On the basis of the traditional virtual synchronous generator control method, according to the application scenario and the magnitude and change trend of the output angular frequency of the inverter, the control method is adjusted. The moment of inertia and damping coefficient in the system are adaptively adjusted, so as to slow down the sudden change of the angular frequency and reduce the change of the angular frequency, shorten the time for the angular frequency to restore the steady state value, and make full use of the flexible adjustment of the control parameters of the virtual synchronous generator.

[0032] like figure 1 As shown, in the method adopted by the present invention, the wind generator is connected to the rectifying part to control the constant vol...

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Abstract

A virtual synchronous generator parameter adaptive method for direct drive wind power generation. When the virtual synchronous generator strategy is applied to the inverter control of the direct-drive wind power generation system, the control parameters virtual moment of inertia and virtual damping coefficient are fixed, so the control is not flexible enough, which limits the realization of the goal. In view of this deficiency, the present invention discloses a parameter adaptive improvement control method for a virtual synchronous generator. The improvement of the method lies in that the virtual moment of inertia and the virtual damping coefficient in the algorithm can be adjusted in real time according to the change of the system frequency, and finally Reduce the rate and amount of change of the system frequency during the fluctuation process, and improve the stability of the power generation system.

Description

technical field [0001] The invention belongs to the field of inverter control of direct-drive wind power generators, in particular to a virtual synchronous generator parameter self-adaptation method for direct-drive wind power generation. Background technique [0002] The global energy crisis is deepening day by day, making wind power generation the focus of people's attention in the new era. However, these power generation methods all need to be connected to the power grid and transmit electric energy through power electronic converters. Therefore, with the increase of the proportion of new energy in the power generation methods, the lack of inertia of power electronic devices will lead to a decline in the stability of the power system. Therefore, it is necessary to introduce a virtual synchronous generator control method to improve the inertia of the inverter. [0003] Although the current research on virtual synchronous generators has improved the magnitude and rate of f...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/50H02J3/38H02J3/24
CPCH02J3/48H02J3/50H02J3/24Y02E10/76
Inventor 李岚程之隆郭潇潇吴雷
Owner TAIYUAN UNIV OF TECH