Start control system and method of wind generating unit

Abstract

The invention relates to a start control system and method of a wind generating unit. The real-time wind speed of the environment in which the wind generating unit works and the real-time rotating speed of a generator shaft are monitored in real time, so that a target pitch angle of blades is determined, a pitch angle of the blades is adjusted to the target pitch angle, the start torque of the blades can be increased, a wind wheel is driven to accelerate to reach paralleling rotating speed, and electric generation is started. Due to the fact that the target pitch angle is determined in real time according to the real-time external environment and the state of the wind generating unit and continuously adjusted, the wind generating unit can adapt to environment changes and self-state changes and can react rapidly in time. Particularly, when the wind speed of the environment in which the wind generating unit works is low and the rotating speed of the blades cannot reach rotating speed needed by paralleling electric generation, the pitch angle of the blades is adjusted to the target pitch angle, the start torque of the blades is increased, the start wind speed of the wind generating unit is lowered, then, the electric generating efficiency of the wind generating unit at the low wind speed is improved, and the manufacturing cost and energy consumption of the unit are not increased.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a start-up control system and method for a wind power generating set. Background technique [0002] With the continuous increase of wind power installed capacity, high-quality wind resources are becoming less and less, so it is particularly important to improve the power generation efficiency of wind turbines, especially under low wind speed conditions. At present, in order to improve the power generation efficiency of wind turbines under low wind speed conditions and make full use of wind energy, one of the effective methods is to reduce the start-up wind speed of wind turbines. [0003] There are roughly four ways to reduce the start-up wind speed of a wind turbine. One is to equip the generator with a power supply module such as a battery. The machine becomes a motor and drives the wind wheel to rotate. This method needs to be equipped with an independent power supply module, wh...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a start-up control system and method for wind power generators to solve the problem of improving the power generation efficiency of wind power generators under low wind speed conditions and reducing the start-up wind speed of wind power generators without increasing manufacturing costs and energy consumption. consumption problem

Images