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Doubly-fed wind power plant grid-connected processing rotor excitation self-adaptive control method

An adaptive control, double-fed wind farm technology, applied in the field of smart grid, can solve the problem of not considering the influence of wind farm wake effect on the output of wind turbines, and achieve the effect of output optimization

Pending Publication Date: 2021-08-06
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

Most of the existing coordinated control methods for wind-fired hybrid systems are aimed at the coordinated control of a single unit, and do not consider the influence of the wind farm wake effect on the output of the wind turbine.

Method used

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  • Doubly-fed wind power plant grid-connected processing rotor excitation self-adaptive control method
  • Doubly-fed wind power plant grid-connected processing rotor excitation self-adaptive control method
  • Doubly-fed wind power plant grid-connected processing rotor excitation self-adaptive control method

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Embodiment Construction

[0076] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless otherwise specified, all technical and scientific terms used herein have the same technical meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0078] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprises" and / or "comprises" are used in this specification, they mean There are features, steps, operations, mea...

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Abstract

The invention discloses a doubly-fed wind power plant grid-connected processing rotor excitation self-adaptive control method. The control method is characterized by comprising the following steps of: 1, listing a mathematical model of an induction generator under a dq coordinate system of a doubly-fed wind power generator; 2, establishing a port controlled dissipation system model of a single doubly-fed induction generator by adopting a port controlled Hamiltonian system theory according to the mathematical model of the doubly-fed induction generator under the dq coordinate system; and 3, expanding the single PCHD model of a doubly-fed wind generating set to obtain a PCHD model of a wind turbine group. According to the control method, the rotor excitation self-adaptive control method of the port controlled dissipation system model of the doubly-fed induction generator is established based on the theoretical knowledge of the PCHD system, so that the output of a wind power plant is optimized.

Description

technical field [0001] The invention belongs to the field of smart grids, and in particular relates to an adaptive control method for rotor excitation of a doubly-fed wind farm connected to the grid. Background technique [0002] As more and more large-scale wind farms are cut into the power grid, after the incoming wind speed passes through the upstream wind turbines, the wind speed decreases and the turbulence intensity increases, forming a wake effect, which reduces the power generation of the downstream wind turbines and increases the turbulence intensity. The aerodynamic performance of the wind turbine has a great influence on the design of the controller. Therefore, according to the wake distribution characteristics of wind turbines, reducing the wake loss of wind farms and increasing output power has become a key issue to be solved in the optimal design and operation of wind farm controllers. Most of the existing coordinated control methods for wind-fired hybrid syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02P9/14H02P21/00
CPCH02J3/381H02P21/00H02P9/14H02J2300/28Y02E10/76
Inventor 刘新宇王亚辉顾波李勇张红涛刘雪梅樊要玲刘延华常瑞徐燕吕灵灵林政国张恒源
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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