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Multi-machine coordinate control method of wind farm subsynchronous oscillation suppressor

A sub-synchronous oscillation and synchronous oscillation technology, applied in the direction of reducing/preventing power oscillation, electrical components, circuit devices, etc., can solve the problem of affecting the stability of wind power generation systems, wind turbine off-grid, oscillation and wind farm power generation, wind speed does not appear There are obvious regularity and other problems, to achieve the effect of easy project scale expansion, reduce actions, and solve the problem of subsynchronous oscillation

Active Publication Date: 2017-01-04
ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER +1
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Problems solved by technology

[0003] The electrical quantities in the power system are highly correlated, and subsynchronous oscillations will spread from the vibration source to adjacent wind farms, thereby affecting the stability of the entire regional wind power generation system, and even causing wind turbines to go off-grid
At present, the oscillation frequency monitored in some regional wind farms is distributed in the range of 2-49Hz, and there is no obvious regularity between the oscillation and the power generation and wind speed of the wind farm

Method used

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  • Multi-machine coordinate control method of wind farm subsynchronous oscillation suppressor
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  • Multi-machine coordinate control method of wind farm subsynchronous oscillation suppressor

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Embodiment Construction

[0037] The present invention will be described below with reference to the drawings and examples.

[0038] The present invention proposes a multi-machine coordinated control method for a subsynchronous oscillation suppressor, which connects a comprehensive monitoring device and subsynchronous oscillation suppressors distributed in various wind farms in the area through a wireless network (3G network or an existing wireless network on the project site), And can remotely access the integrated monitoring device through the Internet, such as figure 1 Shown is the structure diagram of the multi-machine coordinated control system.

[0039] The suppressor installed in each wind farm is used to collect the voltage and current signals of the monitoring point, and the required data is obtained through the AD data acquisition and correction link and the signal filtering link of the suppressor, and then the current flowing into the grid is measured by the subsynchronous oscillation frequency id...

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Abstract

The invention relates to a multi-machine coordinate control method of a wind farm subsynchronous oscillation suppressor. The system comprises a comprehensive monitoring apparatus and subsynchronous oscillation suppressors distributed at various wind farms in a district. The suppressor acquires voltage and current data of various monitoring points and transmits data processed by virtue of an AD data acquisition and correction step, a signal filter step and a subsynchronous vibration frequency identification step and device information of the suppressor to the comprehensive monitoring apparatus by virtue of a wireless network, the comprehensive monitoring apparatus determines an optimum subsynchronous vibration suppression scheme according to the received information by virtue of a comprehensive data analysis step, matches an appropriate control parameter according to the determined subsynchronous vibration frequency and suppression scheme by virtue of a self-adaptive control step and transmits a control command and a control parameter signal to various subsynchronous vibration suppressors by virtue of a wireless network to start a subsynchronous vibration suppression mode, and each suppressor realizes a subsynchronous vibration suppression effect while utilizing the respective controller to control the voltage and reactive power.

Description

Technical field [0001] The invention relates to a multi-machine coordinated control method of a subsynchronous oscillation suppressor for a wind farm, in particular to the suppression of a subsynchronous oscillation caused by a large-scale wind turbine grid connection or a grid connection of multiple wind farms in an area. Background technique [0002] New energy sources such as wind energy and solar energy are renewable and clean energy sources. The extensive use of these energy sources reduces the dependence on traditional thermal power generation and is of great significance to energy conservation and emission reduction. my country's new energy grid-connected power generation technology has developed rapidly, and installed capacity has increased year by year. New energy power generation has become an important branch of my country's power generation field. However, new energy power generation projects are highly dependent on environmental factors. For example, wind farms are b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/01H02J3/18H02J13/00
CPCH02J13/0075H02J3/01H02J3/18H02J3/24Y02E40/30Y04S10/22Y04S40/126Y02E40/70Y02E60/00Y02E40/40
Inventor 于永军祁晓笑郭自勇孙贤大王绪宝王方楠刘国辉范巍李海生杨洋刘大贵王强王飞义王继浩孔祥声杨永飞
Owner ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER
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