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VSG virtual inertia and damping cooperative adaptive control system and method

A technology of adaptive control and virtual inertia, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems such as support capacity and output power oscillation, improve frequency modulation effect, avoid system oscillation instability, and improve dynamic response The effect of the characteristic

Pending Publication Date: 2021-08-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

The traditional VSG control double-fed fan system with constant control parameters has problems in the support ability of the grid frequency and output power oscillation

Method used

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  • VSG virtual inertia and damping cooperative adaptive control system and method
  • VSG virtual inertia and damping cooperative adaptive control system and method
  • VSG virtual inertia and damping cooperative adaptive control system and method

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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 VSG virtual inertia and damping cooperative self-adaptive control system and method, according to the requirements of the operating wind speed and frequency modulation stage, reasonably adjust the virtual inertia coefficient and damping coefficient of the doubly-fed fan VSG control, in order to avoid system oscillation instability , under the premise of fully ensuring the stability of the system, the i...

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Abstract

The invention discloses a VSG virtual inertia and damping cooperative adaptive control system and a method, and the method comprises the steps: building a small signal model containing a wind speed variable according to a doubly-fed fan virtual synchronous control schematic diagram, and employing a fuzzy controller to take the operation wind speed and frequency deviation as the input to determine a virtual inertia coefficient steady-state value; in order to avoid system oscillation instability, determining a damping coefficient steady-state value according to the magnitude relationship between the critical oscillation wind speed and the operation wind speed; and according to the relationship between the frequency deviation and the frequency change rate and the control parameters and the demand change of the frequency modulation process, adjusting the control parameters in a staggered and adaptive manner. According to the VSG virtual inertia and damping cooperative adaptive control system and the method provided by the invention, a doubly-fed fan is facilitated to adapt to different wind speeds, and the frequency modulation effect is improved on the premise of avoiding system oscillation instability.

Description

technical field [0001] The invention relates to the technical field of power generation system control, in particular to a VSG virtual inertia and damping cooperative adaptive control system and method. Background technique [0002] Virtual Synchronous Generator (VSG) control improves the frequency stability of the system by completely simulating the frequency and voltage adjustment characteristics of traditional synchronous machines, and introduces the moment of inertia and damping characteristics, but it also inherits its power oscillation defects. The virtual inertia coefficient and damping coefficient of VSG control will directly affect the frequency modulation characteristics of the wind power system, and how to adjust the control parameters has become an important issue. The traditional VSG control double-fed fan system with constant control parameters has problems in the support ability of the grid frequency and output power oscillation. At present, in order to simpl...

Claims

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Application Information

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IPC IPC(8): H02J3/48H02J3/38H02J3/24
CPCH02J3/48H02J3/381H02J3/241H02J2203/20H02J2300/28
Inventor 贺梦娟李永刚
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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