Method for determining wind field reactive compensation capacity

Abstract

The invention discloses a method for determining wind field reactive compensation capacity. According to the method, three-dimensional space is established with wind field output, wind field grid-connected point voltage and a wind field wind driven generator power factor as coordinate axes, and according to the relations among the wind field output, the wind field grid-connected point voltage, the wind field wind driven generator power factor and wind field output reactive power, the change range of the wind field output reactive power is determined in the three-dimensional space; then according to analysis performed on different types of wind fields and wind driven generator sets, the extreme value of wind field reactive power output is obtained from reactive compensation space so that the wind field output reactive compensation capacity can be determined, and if needed, a reactive compensation device with corresponding capacity is additionally installed in the wind field, so that reactive exchanging between the wind field and a power grid is made to be zero. According to the analysis method of the reactive compensation space, the change range of the wind field reactive power can be accurately obtained, the reactive compensation capacity of the wind field can be rapidly determined, the method can be adaptive to all types of wind fields, reactive compensation performance of the wind field can be fully utilized, and voltage stability of the wind field and the power grid can be improved.

Description

Technical field [0001] The invention relates to the field of power grid optimization analysis, and more specifically, to a method for determining the reactive power compensation capacity of a wind farm connected to a regional power grid. Background technique [0002] Wind power generation is currently one of the most mature technology, the most large-scale development and commercial development prospects for renewable energy power generation. It has been widely used and developed in the past two decades. However, as an intermittent energy source, wind energy is greatly affected by environmental factors such as wind speed. The active power and reactive power of wind farms will change with changes in wind speed. At the same time, the internal circuits of wind farms and transformers are reactive power sources or loads. The output of reactive power in wind farms will cause grid voltage fluctuations, which will affect grid voltage stability and increase regional grid losses. Work com...

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Problems solved by technology

[0005] The existing methods for determining the reactive power compensation capacity of wind farms do not consider the above problems, and the methods are complicated and difficult to operate, and it is difficult to meet the requirements of reactive power compensation capacity configuration of different types of wind farms and wind turbines today.

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