Double-wind-wheel wind turbine variable pitch control method based on fuzzy prediction and sector management

Abstract

The invention discloses a double-wind-wheel wind turbine variable pitch control method based on fuzzy prediction and sector management, and belongs to the technical field of wind turbine control. The double-wind-wheel wind turbine variable pitch control method comprises the following steps of acquiring load-related data of a wind turbine in an SCADA system; carrying out on-line identification on the wind condition; under controllable extreme wind conditions, adopting an intelligent protection control algorithm to carry out load protection on the wind turbine; for uncontrollable extreme wind conditions, counting the occurrence frequency of the extreme wind conditions; adopting sector management for high-frequency extreme wind conditions; and adopting feathering and shutdown for low-frequency extreme wind conditions. According to the double-wind-wheel wind turbine variable pitch control method, a T-S model used in the method has good robustness, and the control model is decoupled, so that subsequent parameter adjustment is simple, convenient and flexible, generalized predictive control is used, future values can be predicted according to current time values and historical values of the wind turbine, an early warning function is achieved for dangerous situations, actions can be made in advance to avoid the dangerous situations, safe operation of the wind turbine is guaranteed, the sector management is carried out on the uncontrollable extreme wind conditions, and the safe operation working condition of the wind turbine is expanded.

Description

technical field [0001] The invention belongs to the technical field of wind turbine control, and in particular relates to a pitch control method of a double wind turbine wind turbine based on fuzzy prediction and sector management. Background technique [0002] In recent years, the development and utilization of wind energy has been highly valued by countries all over the world. Wind turbines can capture a certain amount of energy from the ambient wind speed and convert it into electrical energy. Large-scale is the current development trend of wind turbines, which can greatly improve the utilization efficiency of wind resources. my country's coastal areas rich in wind resources are frequently affected by extreme wind conditions, and the wind speed is often greater than the cut-out wind speed. According to the design specification, when the wind speed is greater than the cut-out wind speed, the generator sets will basically brake to stop and disconnect the grid, which will ...

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Problems solved by technology

According to the design specifications, when the wind speed is greater than the cut-out wind speed, the generator sets will basically brake to stop and disconnect the grid, which will not only affect the grid, but also bring a large impact load to the generator set

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