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

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...

AI Technical Summary

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

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