Method for calculating reactive compensation configured capacity for wind farm

Abstract

The invention discloses a method for calculating reactive compensation configured capacity for a wind farm. The method includes calculating reactive compensation capacity required by a squirrel-cage asynchronous wind turbine unit belonging to a constant-frequency constant-speed asynchronous generator set; calculating reactive compensation capacity required by the constant-frequency constant-speed asynchronous generator set; calculating reactive compensation capacity required by a permanent magnet direct-driven synchronous generator set; calculating reactive compensation capacity required by the whole wind farm; calculating reactive compensation capacity required by an in-grid substation of the wind farm; acquiring a total required reactive compensation capacity, according to the reactive compensation capacity required by the wind farm, the reactive compensation capacity required by the in-grid substation of the wind farm and reactive compensation capacity required by a line. The method has the advantages that on-grid energy of the wind farm can be effectively increased, wind curtailments are reduced, and operation level of new energy power generation is increased.

Description

technical field [0001] The invention relates to the field of reactive power compensation capacity allocation in reactive power voltage control technology in the process of large-scale new energy power generation, in particular to a method for calculating the reactive power compensation allocation capacity of wind farms. Background technique [0002] Most of the large-scale new energy bases generated after my country's wind power enters the stage of large-scale development are located in the "three north regions" (Northwest, Northeast, and North China). Large-scale new energy bases are generally far away from the load center, and their power needs to be transmitted to load center for consumption. Taking Gansu Power Grid as an example, as of July 2014, the installed capacity of grid-connected wind power in Gansu Power Grid has reached 7.07 million kilowatts, accounting for about 20.2% of the total installed capacity of Gansu Power Grid (35 million kilowatts), becoming the secon...

AI Technical Summary

Problems solved by technology

In the actual operation of the wind farm, due to the intermittent and random nature of the wind, the wind turbine cannot generate electricity continuously and stably, and the unstable operation of the wind turbine (especially the process of frequent startup, off-grid, low voltage ride through, etc.) will Causes very large fluctuations in the voltage of the grid-connected substation, threatening the safety of electricity consumption

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