Operation control method based on power limitation of wind generating set

Abstract

The invention relates to an operation control method based on power limitation of a wind generating set. The method comprises the steps of firstly according to voltage adaptation characteristics of different components of the wind generating set, determining the minimum operating voltage limit value UL of the wind generating set; carrying out analyzing to obtain a component associated with the voltage drop of a grid-connected point; and according to the rated current limit value of the component, obtaining the relationship between the output power P of different components and the grid-connected point voltage U; and taking the minimum power as the power output limit value PL of the wind generating set under the working condition of the grid-connected voltage U, so as to ensure that the actual output power of the wind generating set is lower than PL. According to the invention, the implementation mode is simple; hardware of the wind generating set does not need to be changed; evaluationand checking are conducted only according to performance parameters of existing components; and the functions can be achieved by modifying control software. The method can realize the grid-connectedpower generation operation of the wind generating set when the grid-connected point voltage is lower than the standard voltage lower limit, so as to improve the generating capacity income of a wind power plant.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an operation control method based on power limitation of a wind power generating set. Background technique [0002] With the intensification of the world's energy crisis and the improvement of people's awareness of environmental protection, wind power has been paid more and more attention by people, and has become one of the most promising new energy sources. my country has abundant wind power resources, and the development of the wind power industry has a good resource base. By the end of 2019, the installed capacity of wind power in my country has reached 200 million kilowatts. However, most of my country's wind power is located in remote areas, and is generally connected to the end of the power grid, resulting in a generally low voltage at the grid-connected point of wind power. In some cases, the voltage at the grid-connected point of wind power has been lower t...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing wind power generators cannot operate normally when the voltage at the grid-connected point decreases, the present invention provides an operation control method based on the power limitation of the wind power generators, and studies the low-voltage adaptability of the main components of the wind power generators, Combined with the characteristics of wind turbines that can automatically limit the output power, to ensure that the low-voltage protection control strategy of the existing wind turbines is optimized on the premise of satisfying the operation safety of each component, the low-voltage operating range of the unit is increased, and the power generation of the wind farm is improved. Quantitative income

Images