Wind power variable-pitch control system based on hybrid backup power supply

Abstract

The invention discloses a wind power variable-pitch control system based on a hybrid backup power supply. The wind power variable-pitch control system based on the hybrid backup power supply comprisesa system safety chain, a main control unit, a main communication unit, a first sub-communication unit, a second sub-communication unit, a first variable-pitch shaft control cabinet, a second variable-pitch shaft control cabinet, a third variable-pitch shaft control cabinet, a first variable-pitch working unit, a second variable-pitch working unit and a third variable-pitch working unit. Accordingto the wind power variable-pitch control system based on the hybrid backup power supply, blades are provided with special variable-pitch driving systems to complete the variable pitch and safe control, a modular design concept is adopted in designing, so that the number of devices and the space of a variable-pitch cabinet are greatly reduced, the requirements and the safety of a variable-pitch system are completely met on the electrical control, control loop devices are greatly simplified as well, and the maintenance is more convenient; and electrical isolation of the power supply is realizedbetween the variable-pitch control cabinets, and a power supply module adopts a cold plate technology, so that it is guaranteed that the variable-pitch system adapts to a severe environment.

Description

technical field [0001] The invention belongs to the technical field of renewable clean energy, and in particular relates to a wind power pitch control system based on a hybrid backup power supply. Background technique [0002] At present, in many 1.5MW wind turbines in China, the blades are driven by the pitch system to adjust the blade lift angle, so that the fan can absorb the maximum wind energy at low wind speed, maintain a stable and constant power output when the wind speed exceeds the rated wind speed, and retract the propeller in time when the fan fails. Apply air brakes. The stability and reliability of the pitch control system not only affects the power generation of the entire wind turbine, but is even directly related to the safety of the entire wind turbine. At home and abroad, it is not uncommon to fail to retract the propeller due to a fault in the pitch control system, resulting in a speeding accident. [0003] Some wind turbine pitch systems were put into p...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to provide a wind power pitch control system based on a hybrid backup power supply, which solves the problem of how to provide a stable power supply to the pitch system when the wind turbine suddenly loses power or the power supply is unstable

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