A method for establishing a low-order frequency response model of a doubly-fed distributed wind power system

A wind power system and response model technology, applied in data processing applications, special data processing applications, instruments, etc., can solve a large number of modeling work and simulation time, can not be applied to double-fed distributed wind power systems, etc., to achieve simplified modeling The effect of work

Active Publication Date: 2020-08-25
HOHAI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the traditional low-order frequency response model cannot be applied to the current doubly-fed distributed wind power system. Method for Low-order Frequency Response Model of Wind Power System

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  • A method for establishing a low-order frequency response model of a doubly-fed distributed wind power system
  • A method for establishing a low-order frequency response model of a doubly-fed distributed wind power system
  • A method for establishing a low-order frequency response model of a doubly-fed distributed wind power system

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Embodiment Construction

[0042] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0043] The present invention first proposes a simplified model of the doubly-fed wind turbine in low, medium and high wind speed ranges, and then deduces the relationship between the additional output active power of the doubly-fed wind turbine and the system frequency deviation according to the small signal analysis theory; finally, the The derived relationship between the additional active power and the system frequency deviation in the low, medium and high wind speed ranges is integrated with the traditional low-order frequency response model, so that a doubly-fed distributed wind power system can be established in the low, medium and high wind speed ranges low-order frequency response model. details as follows:

[0044] Step 1. Accord...

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Abstract

The invention discloses a method for establishing a doubly-fed distributed wind power system low order frequency response model. Firstly a simplification method corresponding to each wind speed interval of a doubly-fed wind power set detailed model is provided according to the frequency response characteristics of the doubly-fed wind power set in low, medium and high wind speed intervals; and then the low order frequency response model suitable for the doubly-fed distributed wind power system in the low, medium and high wind speed intervals is deduced and established based on the theory of small signal analysis on the basis of the conventional low order frequency response model so as to be used for rapidly and accurately simulating the dynamic frequency response characteristics of the doubly-fed distributed wind power system. The modeling work is greatly simplified and an effective and convenient approach can be provided for subsequent analysis of the frequency response characteristics of the doubly-fed distributed wind power system so that the reference basis can be provided for implementation of the doubly-fed wind power set frequency control technology.

Description

technical field [0001] The invention relates to a method for establishing a low-order frequency response model of a doubly-fed distributed wind power system, and belongs to the technical field of frequency characteristic analysis and control of a distributed wind power system. Background technique [0002] Due to the fluctuation and randomness of the output of wind turbines, and the use of power electronic devices in wind turbines, the rotor speed of the generator is decoupled from the frequency of the grid. As a large number of wind turbines are connected to the grid, the frequency of the traditional grid will inevitably change. Dynamic characteristics, which in turn affect the stable operation of the power grid. [0003] The traditional low-order frequency response model first proposed by Anderson P.M in 1990 has been mature and widely used in the past two decades. The core simplification idea proposed by the model is to only consider the dominant mode that affects the dy...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06G06F30/20
CPCG06F30/20G06Q50/06
Inventor 潘文霞全锐刘明洋
Owner HOHAI UNIV
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