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发明公开
CN105024402A 一种双馈型风电机组高电压穿越方法 无效 - 驳回

一种双馈型风电机组高电压穿越方法
摘要：
本发明涉及一种双馈型风电机组高电压穿越方法，实时检测电网侧电压u，计算f(u)＝k*u+A的值；当f(u)的值≤udc0时，控制直流侧母线电压给定值为udc0；当udc0＜f(u)的值≤udcmax时，直流侧母线电压给定值为f(u)的值；当f(u)的值≥udcmax时，直流侧母线电压给定值为udcmax；其中，udc0为满足额定交流电压输出所需的最小直流母线电压值，udcmax为最大值，k大于1；根据确定的直流侧母线电压给定值相应地调节网侧变流器的开关元件的触发脉冲。根据电网电压的实时变化以及变化的范围相应调节直流母线电压的给定值，然后完成高电压穿越，实现在高电压状态下机组的不脱网运行。
摘要（英）：

The invention relates to a high voltage ride-through method of a doubly-fed wind turbine generator set. The method comprises the steps of: a voltage u on a power gride side is detected in real time, and the value of f(u)=k*u+A; when f(u)<=udc0 is calculated, the given value of the voltage of a direct current side bus is controlled to be udc0; when udc0=udcmax, the given value of the voltage of the direct current side bus is udcmax; wherein udc0 is a minimum direct current bus voltage value needed by rated alternating current voltage output; udcmax is the maximum value, and k is larger than 1; and the trigger pulse of a switch element of a network side current transformer is correspondingly adjusted according to given value of the voltage the direct current side bus. According to the invention, the given value of the voltage the direct current side bus is correspondingly adjusted according to the real-time change and the change range of the voltage of the power grid, and then high voltage ride-through is finished, so that ride-through operation of the generator set under a high voltage state is realized.

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