Wind power cut-out control method for improving wind energy utilization rate of wind generating set

Abstract

The invention discloses a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set. The wind power cut-out control method for improving the wind energy utilization rate of the wind generating set comprises the following steps that an anemograph signal V<t> is acquired, and filtering results of different time lengths through different filters are obtained; whether the filtering results of wind speed signals are greater than two groups of set values or not is judged to obtain two groups of Boolean values; whether to stop or not is judged according to the first group of Boolean values; if not, power reduction operation is executed according to the second group of Boolean values and the corresponding duration; and whether to execute power recovery operation or not is judged according to the relationship between the filtering results and the set values in the preset time. According to the wind power cut-out control method for improving the wind energy utilization rate of the wind generating set, under the condition that the structural design of the wind generating set is not improved, by improving the control algorithm of the wind generating set, the fatigue load is reduced, the situation that the wind generating set stops under strong wind is reduced, and the generating capacity is improved.

Description

technical field [0001] The invention relates to the technical field of wind power control, in particular to a wind power cut-out control method for improving the wind energy utilization rate of a wind power generating set. Background technique [0002] The wind cut-out control of wind turbines is an important part of the safety chain of wind turbines. It is related to the environmental adaptation range and power generation of wind turbines, and also has an important impact on the safety and fatigue life of wind turbines. The current mainstream cut-out control method is simple "filter detection + shutdown", that is, different safety chain shutdowns are triggered when the detection value exceeds different setting intervals. With the development of technology, the power of wind turbines and the diameter of wind rotors have increased significantly, and the existing simple "filter detection + shutdown" control has been unable to meet the stable operation requirements of larger po...

AI Technical Summary

Problems solved by technology

Although this method can increase the cut-out wind speed, it cannot solve the situation of excessive limit load under high turbulence conditions. Excessive instantaneous wind speed under high turbulence conditions will still cause frequent shutdown of the unit

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