Optimal configuration and operation method for reactive compensation of wind farm

Abstract

The invention relates to an optimal configuration and operation method for reactive compensation of a wind farm. The optimal configuration and operation method is characterized by comprising the following steps of: (1) analyzing the reactive output characteristics of the wind farm, and installing a reactive compensation device in the wind farm and configuring a volume for the reactive compensation device; and (2) detecting reactive powers of a fan outlet and an interconnection point of the wind farm, and mechanically controlling the static reactive compensation and the dynamic reactive compensation of the wind farm. The optimal configuration and operation method is designed reasonably, the combination operation of the static reactive compensation and the dynamic reactive compensation of the wind farm is realized, and the reactive powers of the wind farm and a power grid are ensured under the optimal condition of the reactive compensation device of the wind farm, therefore the effect of maintaining power grid stabilization is achieved, the reactive compensation property of the wind farm is improved, the reactive compensation equipment investment is reduced, and the reactive compensation economic and technological requirements of the wind farm are satisfied.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to a reactive power compensation optimization configuration and operation method of a wind farm. Background technique [0002] With the reduction of conventional energy sources, wind power generation has gradually become an imperative development trend. However, as an intermittent energy source, wind energy is greatly affected by the environment. Due to changes in wind speed and other environmental factors, the active power and reactive power of the wind farm will change accordingly, so that the wind turbine will absorb a large amount of reactive power during operation. , the change of reactive power will cause voltage fluctuation in the grid, even affect the voltage stability of the grid, and increase the network loss of the regional grid. At present, wind farms mainly adopt the following two reactive power compensation methods: [0003] One is to invest static capacitor acti...

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Problems solved by technology

[0003] One is to invest static capacitor action compensation in the wind farm, so that the accumulated reactive power meets the requirements of the grid company. The problem with this method is that during the operation of the wind farm, due to the characteristics of the switching action of the capacitor, it cannot follow the wind farm well. The demand for reactive power changes makes the reactive power exceed the specified requirements in some time; the second is to invest a large number of dynamic reactive power compensation devices in the wind farm, such as SVC or STATCOM, etc. This method can meet the reactive power of the wind farm. However, the cost of dynamic reactive power compensation device is relatively high, and the economy is poor, which restricts the actual use of dynamic reactive power compensation device

[0004] To sum up, the existing reactive power compensation methods have different problems, and it is difficult to meet the economic and technical needs of wind farm reactive power compensation.

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