Wind power bundling control method after wind power and thermal power accessing to power grid

Abstract

The invention discloses a wind power bundling control method after wind power and thermal power accessing to a power grid and belongs to the technical field of power system security defense. The method includes: forwardly or reversely adjusting wind power and thermal power output; respectively calculating and power grid transient stability margin, element load degree index and bus voltage threshold-crossing index after wind power and thermal power output adjustment; calculating wind power / thermal power output according to the calculated power grid transient stability margin, element load degree index and bus voltage threshold-crossing index; reversely / forwardly adjusting wind power and thermal power output when wind power / thermal power output is larger than a preset threshold; and forwardly / reversely adjusting wind power and thermal power output when wind power / thermal power output is smaller than the preset threshold. By the method, reasonable wind power and thermal power output is guaranteed, and normal operation of the power grid is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of power system security defense, and in particular relates to a wind power bundling control method after wind power and thermal power are connected to a power grid. Background technique [0002] Due to the characteristics of the distribution of wind resources in my country and the development status of the power grid, the "Three North" regions rich in wind energy resources in my country present the characteristics of large-scale centralized development, and wind farms are usually located at the end of the power system, where the local load is low and the power grid is weak , wind power cannot be fully absorbed locally, and needs to be sent over long distances. However, due to the randomness and volatility of wind power power, it is difficult to control the wind power transmission. In addition, the annual utilization hours of wind power are low, the economy of long-distance transmission alone is very poor, an...

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Problems solved by technology

[0004] At present, the "bundling" coordinated delivery of wind and fire has been widely used in my country, and a lot of research has been done on the control strategy of "bundling". In terms of power generation planning of thermal power units, reduction of line fluctuating power, improvement of wind power consumption capacity, solution to the problem of reduction in grid thermal reserve capacity after wind power access, and optimization of wind-fired structure ratio, there is a lack of research on wind-fire coordinated optimization control

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