Method for stabilizing network side voltage of wind power generator unit

Abstract

The invention relates to a method for stabilizing the network side voltage of a wind power generator unit, which comprises the following steps of: (1) constructing a reactive power regulating reactance network which meets the requirement that the network side voltage of the wind power generator unit is regulated to realize stable running of the unit; (2) controlling a main body to detect the network side voltage of the wind power generator unit; and (3) when the network side voltage of the wind power generator unit is deflected from the voltage range for the stable running of the unit, controlling the main body to confirm reactive power current needed by voltage regulation and outputting or inputting the current by a current transformer for adjusting the network side voltage of the unit. The invention realizes network side voltage regulation by utilizing the reactive power ability of the current transformer of the wind power generator unit, has the advantages of low regulating cost, less power grid construction investment, high system reliability, high regulating efficiency, and the like and is easy to realize the unification of effectiveness and economy of voltage regulation.

Description

technical field [0001] The invention relates to a method for stabilizing voltage, in particular to a method for stabilizing the grid-side voltage of a wind power generating set. Background technique [0002] At present, the variable speed and constant frequency technology is generally used in megawatt wind turbines, that is, through the adaptation of the converter, the variable speed running generator is connected to the fixed frequency power grid, and the speed of the generator is adjusted according to the actual wind speed. To achieve the maximum wind energy capture of wind turbines. [0003] The basic components of doubly-fed wind turbines and full-power wind turbines are as follows: figure 1 , figure 2 As shown, usually, a box-type transformer 30 is arranged at the front end of each wind power generating set to convert the high voltage (such as 35KV) of the wind field into a full-power transformer suitable for the current mainstream converter 20 and doubly-fed generat...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method for stabilizing the grid-side voltage of wind power generators, which overcomes the defects of large investment, affecting the working reliability of wind power generation systems, and difficulty in adjusting the grid voltage effectively and economically.

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