Wind farm combined protection device and method, and wind power generation system

Abstract

The invention discloses a combined wind farm protection device for a wind power generation system; the system comprises at least one wind generating set, and each wind generating set comprises a set of peripheral electric installation; the device comprises a power grid monitoring module and a combined protection module; the power grid monitoring module is used for transmitting a startup instruction to the combined protection module when detecting that a wind farm is offline, and transmitting a shutdown instruction to the combined protection module when detecting that a power grid is returned to normal; and the combined protection module is used for starting up part or all of the wind generating sets to supply electricity to the peripheral electric installations corresponding to all the wind generating sets when receiving the startup instruction, and stopping operation when receiving the shutdown instruction. The invention also discloses the wind power generation system and a combined wind farm protection method. The adoption of the embodiment of the invention can guarantee energy supply for the peripheral electric installations of the wind generating sets under the circumstance that the wind farm is offline for a long time in an extreme weather, thus enhancing the self-protecting capability of the wind generating sets under extreme operation conditions.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind farm combined protection device and method, and a wind power generation system. Background technique [0002] With the development and maturity of wind power technology, wind energy has become the fastest growing new energy. However, with the increase in the single-unit capacity of wind turbines and the increasing scale of wind farm construction, improving the self-protection of wind turbines under extreme operating conditions and special external environments has become the focus of research and development. [0003] As we all know, wind resource is an intermittent energy source, which is uncontrollable, unpredictable and random. The harmonics and peaks in its output voltage and power will cause great impact and damage to the power grid, and even cause the entire power grid paralysis. [0004] In addition, due to the noise of the wind turbine itself and th...

AI Technical Summary

Problems solved by technology

However, due to the technical barriers existing in the current smart grid and the uncontrollable causes of the wind farm being off-grid for a long time, the UPS power supply cannot fully meet the power supply requirements of these normal equipment.

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