Control system and method for reducing wind power fluctuation

Abstract

The invention discloses a control system for reducing wind power fluctuation. The control system comprises a power sponge, a DC voltage detection device, an AC current detection device, an AC voltage detection device and a control unit, wherein the power sponge is connected in series between a power grid and a resistance load; the control unit is used for measuring an AC voltage u<s> and an AC current i<s> from the output of the power grid to the power sponge through all detection devices, also acquiring wind power P<W0> from a wind power generator, and calculating to obtain pulse width modulation signals u, u and u<c> of the three-phase power sponge, the signal is used for controlling the output voltage U1 on the resistance load, so that the power P1 of the resistance load is controlled, the fluctuation of the wind power P<W0> is suppressed, the power injected into the power grid from the wind power generator is P<Wref>, and stable tendency is achieved. Correspondingly, the invention also discloses a control method for reducing the wind power fluctuation.

Description

technical field [0001] The invention relates to a wind power control system and method, in particular to a control system and method for reducing wind power fluctuations. Background technique [0002] In order to solve the shortage of fossil resources and the environmental pollution caused by coal burning, it is an inevitable choice for our country and other countries in the world to vigorously develop clean and environmentally friendly wind power and other renewable energy sources. [0003] In order to realize the energy strategy of low-carbon, environmental protection, green and sustainable development, my country has vigorously developed renewable energy in recent years, and has issued a series of standards and policies for renewable energy, which has made great progress in renewable energy, especially in Regarding the development and utilization of wind power energy, by the end of 2014, the installed capacity of wind power grid-connected had reached 96.37 million kilowatt...

AI Technical Summary

Problems solved by technology

At present, in order to ensure the safe and stable operation of the power grid, a large number of wind curtailment phenomena have been caused. According to statistics, the average wind power curtailment ratio in my country was 12% in 2013. Although it has decreased in 2014, it is still as high as 8%.

[0005] In order to solve the problem of wind curtailment, the power grid has made a lot of investment to strengthen the construction of the power grid, enhance the grid capacity, and increase the reserve capacity. However, on the one hand, the investment is too large, and on the other hand, the construction period is long, and the problems existing in my country's wind power cannot be solved immediately.

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