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Method for using unified power flow controller in wind turbine generator grid-connected operation

A technology of power flow controller and wind turbine, which is applied in the field of electric power and can solve the problem of exceeding the line operation capacity.

Inactive Publication Date: 2017-01-04
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grid connection of wind farms will change the power flow distribution of the original system, and may cause the operating capacity of a certain section of the line to exceed its capacity limit. If the scale of the wind farm continues to expand, this section of the line will become the main bottleneck restricting wind power output

Method used

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  • Method for using unified power flow controller in wind turbine generator grid-connected operation
  • Method for using unified power flow controller in wind turbine generator grid-connected operation
  • Method for using unified power flow controller in wind turbine generator grid-connected operation

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings. 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.

[0049] The method for applying the unified power flow controller of the present invention in the grid-connected operation of wind turbines, such as figure 1 shown, including the following steps:

[0050] Step 1, select system parameters to model the asynchronous wind turbine;

[0051] Step 2, establish the circuit model of UPFC, and optimize the modeling of the parallel side and series side of UPFC;

[0052] Step 3: Connect the UPFC in series on the grid-connected line of the wind farm, and use the large reactive power compensation function of the UPFC to improve the low-voltage ride-through capability after the wind farm fails and the power flow control capability of the line.

[0053] In st...

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Abstract

The invention discloses a method for using a unified power flow controller in wind turbine generator grid-connected operation, and belongs to the technical field of power electronics. An active and inactive independent control system is established on the series side of a UPFC, compensating voltage is output to an electric transmission line, the power flow distribution capability of the system for optimizing a wind power gird-connected system is researched, and a model is established in Matlab / Simulink software. Simulation results indicate that the UPFC can obviously improve the low voltage ride through capability and optimized power flow distribution of the wind power grid-connected system based on powerful reactive compensation capability and power flow control capability of the UPFC.

Description

technical field [0001] The invention discloses a method for applying a unified power flow controller in the grid-connected operation of wind turbines, belonging to the technical field of electric power. Background technique [0002] There are two types of wind power generation, off-grid and grid-connected. The off-grid type has a small scale and is mainly used to solve independent power supply in remote areas. Grid-connected operation of wind power is the main development direction of wind power generation at home and abroad. After wind turbines are connected to the grid, they can be compensated and supported by the large power grid, which can make better use of wind energy and improve the stability of wind farms. Because wind turbines are different from conventional synchronous power generation Units, large-scale wind power grid connection has changed the power flow distribution of the original grid, line transmission power and transient characteristics of the grid fault. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/06H02J3/18
CPCH02J3/06H02J3/1807H02J3/386Y02E10/76Y02E40/10
Inventor 王蒙顾佳易马寿虎陆文涛陆文伟
Owner NANJING INST OF TECH
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