Method for regulating terminal voltage by reactive power support of double-fed wind generator unit and system thereof
A doubly-fed wind turbine and machine terminal voltage technology, applied in flexible AC transmission system, AC network voltage adjustment, reactive power compensation, etc., can solve the problem of difficult to realize dynamic adjustment of machine terminal voltage, inability to adapt to new changes, increase input costs, etc. problems, to achieve the effect of benefiting the quality of the power grid, reducing input costs, and improving quality
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[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0020] See figure 1 As shown, the method for adjusting the terminal voltage of the reactive power support of the doubly-fed wind turbine of the present invention includes the following steps: system initialization; measuring the terminal voltage and calculating the error; judging whether the error is between the dead zone and calculating the reactive power setting Q PI ; Calculate the maximum reactive power Q of the doubly-fed wind turbine at this time max ; According to Q PI And Q max Determine the reactive power control command Q out ; According to the reactive power control command Q out , To drive the doubly-fed wind turbine to generate the corresponding reactive po...
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