Wind power plant single-machine equivalent model establishment method

Abstract

The invention relates to the construction of a wind power model, in particular to a wind power plant single-machine equivalent model establishment method, and aims to solve the problem of a large error of a wind power plant single-machine equivalent model based on a capacity weighting method in the prior art. The method includes the following steps: step one, drawing an input power difference-equivalent error scatter diagram; step two, fitting the input power difference-equivalent error scatter diagram by using a power function to obtain an input power difference-equivalent error fitting curve graph, and solving a characteristic power exponent b of a wind turbine generator; step three, replacing the capacity in a single-machine equivalent model based on the capacity weighting method by using the b-th power of actual power of the wind turbine generator as a weight coefficient, and adding a correction coefficient to complete construction of the wind power plant single-machine equivalent model using the b-th power of actual power of the wind turbine generator as the weight coefficient.

Description

technical field [0001] The invention relates to the establishment of a wind power model. Background technique [0002] With the increasing demand for developing new energy sources, the installed capacity of wind power is increasing, and the impact on the power system cannot be ignored. In order for the power system to correctly assess the impact of large-scale wind farm access on grid stability, and to improve the efficiency of the power system in the calculation and analysis process, a simple and effective wind farm equivalent method is studied to establish an accurate and reliable equivalent method. The value wind turbine model has very important practical significance for the research of power system and wind power generation technology. [0003] The existing capacity-weighted wind farm stand-alone equivalent model is the most widely used due to its simple calculation, but because it does not consider the actual power state factors, the error is relatively large in the c...

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