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发明授权
CN109139365B 一种提高大型风电机组发电性能的最优转速控制方法 有权

一种提高大型风电机组发电性能的最优转速控制方法
摘要：
本发明公开了一种提高大型风电机组发电性能的最优转速控制方法、装置、设备及计算机可读存储介质，方法包括：获取第n个控制周期的发电机输出功率Pg(n)和发电机转速ωg(n)、第n‑1个控制周期的发电机输出功率Pg(n‑1)和发电机转速ωg(n‑1)；计算发电机输出功率变化量eP和发电机转速变化量eω，获得发电机转速变化方向标志位a：eP＝Pg(n)‑Pg(n‑1)，eω＝ωg(n)‑ωg(n‑1)，m为大于0的预设值；根据发电机输出功率改变量e'P和发电机转速改变量e'ω，计算发电机转速变化幅值Δωg：e'P＝|eP|，e'ω＝|eω|，k1和k2均为预设控制系数；根据发电机转速ωg(n)、发电机转速变化方向标志位a、发电机转速变化幅值Δωg，计算发电机期望控制转矩Topt：Topt＝kopt(ωg(n)‑aΔωg)2，其中，kopt为最优增益系数。本申请公开的上述技术方案，根据e'P和e'ω，得到发电机转速的优化项‑aΔωg，以实现发电机转速自动寻优，从而实现最大风能捕获。
摘要（英）：

The invention discloses an optimal rotating speed control method, device, and equipment for improving the power generation performance of a large wind turbine unit and a computer readable storage medium. The optimal rotating speed control method includes the steps that a generator output power P(n) and a generator rotating speed omega(n) of the nth control cycle, a generator output power P(n-1) and a generator rotating speed omega(n-1) of the n-1th control cycle are obtained; a variable quantity e

of the generator output power and a variable quantity e of the generator rotating speed are calculated, and a generator rotating speed changing direction mark position a (please see the specifications for the formula) is obtained, wherein e

= P(n) - P(n-1), e= omega(n) - omega(n-1), and m is a preset value greater than 0; according to a generator output power variable quantity e'

and a generator rotating speed variable quantity e', a generator rotating speed variable amplitude Delta omega (please see the specifications for the formula) is calculated, wherein e'

= |e

|, e' = |e|, and k<1> and k<2> are all preset control coefficients; according to the generator rotating speed omega(n), the generator rotating speed changing direction mark position a, and the generator rotating speed variable amplitude Delta omega, a generator expected control torque T is calculated, wherein T = k(omega(n) - a Delta omega)<2>, and the k is an optimal gain coefficient. According to the technicalscheme, according to the e'

and the e', a generator rotating speed optimization item -a Delta omega is obtained, thus automatic optimization of the generator rotating speed is realized,and then maximum wind energy capture is realized.

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