Wind power plant layer active power control system and method

Abstract

The invention discloses a wind power plant layer active power control system which comprises a power setting device and a power distributing device. The power setting device is used for classifying units according to unit operation information, collected by a wind power plant supervisory control and data acquisition (SCADA) system, of wind generating sets and super-short-term prediction power information obtained form a wind power prediction system, receiving power instructions issued by a superior dispatching system, obtaining setting instructions and a control circle of power to be distributed, judging whether the output needs to be increased or reduced in a wind field, and sending instructions whether the output is conducted or not to the corresponding power distributing device according to a judged handling pattern. The power distributing device is used for issuing control instructions to a fan control system according to current unit classification information and set power distribution strategies, and the fan control system is used for controlling all classes of units. The wind power plant layer active power control system can well control and analyze the active power of a wind power plant so as to ensure the safe and reliable operation of the wind power plant.

Description

technical field [0001] The present invention relates to technologies related to wind power generation, in particular to a system and method for controlling active power at a wind farm level. Background technique [0002] Wind farms use wind energy and combine a series of generators to generate electricity from wind. It is an environmentally friendly and clean method of power generation. The principle of wind power generation is to use the wind to drive the blades of the windmill to rotate, and then increase the speed of rotation through the speed increaser to promote the generator to generate electricity; it consists of the nose, rotor, tail, and blades. The functions of each part are: blades It is used to receive the wind force and convert it into electric energy through the nose; the empennage makes the blades always face the direction of the wind so as to obtain the maximum wind energy; the swivel can make the nose rotate flexibly to realize the function of adjusting the ...

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Problems solved by technology

[0003] But at present, the grid-connection of large-scale wind power has brought great challenges to power grid dispatching and peak regulation. In 2009, the State Grid issued the regulations on wind farm access to the grid, which clearly pointed out that wind farms must have the ability to regulate active power, and according to the power system The dispatch center commands to control its active power output to ensure that the maximum output power and power change rate of the wind farm do not exceed the value specified by the dispatch center. Due to the dynamic variability of the wind farm in time and space, this complex dynamic change characteristic requires the wind farm The management system has good control and analysis functions to ensure the safe and reliable operation of the wind farm

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