A method for establishing a simulation model of a double-fed wind turbine converter in a wind farm

Abstract

The invention relates to a method for establishing a simulation model of a doubly-fed wind turbine converter in a wind farm, comprising: all the six bridge arms of the machine-side converter and the six bridge arms of the grid-side converter are equivalent to controlled voltage sources , the DC side of the equivalent machine-side converter and the grid-side converter are connected with a resistance branch, and two resistors are connected in series on each resistance branch, and a connection is arranged between the two resistors on each resistance branch. location; establish the power transfer model of the machine-side converter and the grid-side converter, and calculate the voltage of the DC energy storage capacitor according to the power transfer model; combine the voltage of the DC energy storage capacitor with the output of the machine-side converter controller The modulated wave and the modulated wave output by the controller of the grid-side converter are calculated to obtain the voltage control quantity of each controlled voltage source. The simulation model constructed by the invention is easy to calculate during simulation, and can improve simulation efficiency under the premise of ensuring accuracy.

Description

technical field [0001] The invention relates to a method for establishing a simulation model of a double-fed wind turbine converter in a wind farm, and belongs to the technical field of new energy grid-connected power generation. Background technique [0002] Wind power generation technology is favored due to its cleanness, no pollution, relatively mature industrial technology and relatively low power generation cost. Due to the random and intermittent characteristics of wind power generation, the scale of wind farm power generation is greatly affected by wind speed. At present, the large-scale energy storage technology is not perfect. When the asynchronous wind turbine is connected to the grid, it needs to absorb reactive power from the grid side. As a result, wind energy cannot have sufficient adjustability like conventional energy sources, which will have a negative impact on the power system. Due to the access of intermittent energy sources, the security and stability ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for establishing a simulation model of a double-fed wind turbine converter in a wind farm, which is used to solve the problem of inaccurate and error-prone simulation results due to the large amount of calculations in the simulation analysis of the existing converter model question

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