UPFC-based POD design method of damping wind-power-system-included oscillating characteristic

A technology of wind power system and oscillation characteristics, applied in wind power generation, reducing/preventing power oscillation, electrical components, etc., can solve problems such as system damping oscillation

Active Publication Date: 2018-04-27
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0004] The present invention provides a POD design method based on UPFC damping and wind power system oscillation characteristics, which is used to solve the technical problem of system damping oscillation after the existing wind power is connected to the grid

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  • UPFC-based POD design method of damping wind-power-system-included oscillating characteristic
  • UPFC-based POD design method of damping wind-power-system-included oscillating characteristic
  • UPFC-based POD design method of damping wind-power-system-included oscillating characteristic

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Embodiment Construction

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, 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.

[0058] A POD design method based on UPFC damping and oscillation characteristics of wind power system, the steps are as follows:

[0059] S1, build the model of the unified power flow controller UPFC.

[0060] The specific steps are: S1.1, construct the mathematical model of the unified power flow controller UPFC, such as figure 1 As shown, the resistance and transient state of the transformer need to be ignored in establishing the mathematical mo...

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Abstract

The invention discloses a UPFC-based POD design method of a damping wind-power-system-included oscillating characteristic. The method comprises: S1, constructing a model of a unified power flow controller (UPFC); S2, constructing a model of a doubly-fed induction generator (DFIG) set; S3, adding the UPFC model obtained at the S1 and the DFIG model obtained at the S2 into a grid system; S4, analyzing influences on damping characteristics of a grid system by the wind-power grid-connected capacity and a UPFC compensation degree; S5, constructing a model of a damped oscillation controller (POD); S6, connecting an output terminal of the POD controller to a parallel side of the UPFC of the grid system in the S3 and using a signal of a grid system connecting line as an input signal of the POD controller; and S7, for the grid system in the S4, changing the output of a synchronous generator in the grid system and a transmission power of the grid system connecting line and analyzing influences on the damping characteristics of the grid system by the UPFC and the POD controller. Therefore, references are provided for large-scale wind power plant access planning and analyses of the power of the interconnection system connection line and inter-area oscillation characteristics.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a POD design method based on UPFC damping and oscillation characteristics of a wind power system. Background technique [0002] Accompanied by the rapid development of my country's modern industry, it has brought about the excessive consumption of fossil energy such as coal and oil and serious environmental pollution problems. As a green, pollution-free and clean energy, wind energy not only optimizes the energy structure, but also plays an important role in improving the ecological environment. Vigorously developing wind power is an important measure to achieve sustainable energy development in my country. However, wind energy has randomness and volatility. With the large-scale grid connection of wind power, it has changed the current distribution of the original power system, line transmission power and the inertia of the entire system. , which has a great imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/24H02J3/386H02J2203/20Y02E10/76
Inventor 和萍陶玉昆李从善杨存祥张文忠李凯章耿斯涵和艳萍胡亚伟李中全胡威朱莉亚
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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