Active power optimizing and distributing method for wind generator unit of wind power station

Abstract

The invention discloses an active power optimizing and distributing method for a wind generator unit of a wind power station, which calculates power margin of the wind generator unit on the basis of real-time wind measuring data and forecast data of wind power at ultra-short term. The constraint conditions of running of the wind generator unit are sufficiently taken into account, and power distribution and starting and stopping of the wind generator unit can be realized by the aid of a rising power array, a decreasing power array and a starting array. By the active power optimizing and distributing method, the wind generator unit can be involved in power adjustment as far as possible and can respond to distributing commands quickly. Meanwhile, adjustment frequency of the wind generator unit is reduced and can favorably stably run for a long time. The active power optimizing and distributing method can be used for parameterizing the characteristics of wind generator units in different types, and can be suitable for wind generator units in different types.

Description

technical field [0001] The invention aims at the active power control distribution mechanism of the wind farm and is applied to the wind farm. The invention belongs to the field of power system power generation. technical background [0002] In recent years, my country's wind power has developed rapidly. As the proportion of wind turbine installed capacity in the total installed capacity continues to increase, large fluctuations in the power sent to the grid by wind turbines will bring more and more hidden dangers to the stable operation of the grid. Realizing the observability and controllability of wind farm power is an urgent problem to be solved. [0003] The "Technical Regulations for Connecting Wind Farms to the Power System" issued by the State Grid Corporation of China clearly stipulates: "Wind farms must have power regulation capabilities and be able to control their active power output according to the instructions of the grid dispatching department. In order to ...

AI Technical Summary

Problems solved by technology

[0006] 1) The fan will start and stop more frequently, which will affect the life of the fan. At the same time, it will take a certain amount of time to start and stop the fan, resulting in a slower adjustment speed;

[0007] 2) The adjustment granularity is large, and more accurate adjustment cannot be achieved

In this way, in order not to exceed the scheduling limit, a certain margin must be left, so that the active power of the wind farm can only be maintained at a low value, which damages the economic benefits of the wind farm;

[0008] 3) The life balance of the fans in the whole field is not considered

When there is a continuous rise and fall of power, it may cause some fans to start and stop frequently, while other fans have not participated in the adjustment, which will eventually lead to the unbalanced life of the fans in the entire wind farm and increase the difficulty of maintenance.

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