Index evaluation method for simulation credibility of doubly-fed wind power plant equivalent model

Abstract

The invention discloses an index evaluation method for simulation credibility of a doubly-fed wind power plant equivalent model. The device is characterized by comprising a base, firstly, a dynamic trajectory of a doubly-fed wind power plant is analyzed based on measured data; on the basis of an original equivalent model of the doubly-fed wind turbine, an active control model and a reactive control model under a low voltage ride through function are built, and a dominant oscillation mode of each stage in a track is effectively extracted by comparing simulation under the equivalent model with an actual measurement track; establishing a corresponding error index system through different dominant oscillation modes, wherein the established index system comprises an active recovery slope errorindex, an extreme value error index and a total error energy index; and finally, verifying whether each error index effectively reflects the correlation between the trajectories or not by comparing the trajectories before and after simulation with the actually measured trajectories, and comprehensively and effectively reflecting the difference degree between system simulation and the actually measured trajectories, thereby finally achieving the quantitative evaluation of the dynamic simulation credibility. The method has the advantages of scientificity, reasonability, high applicability, goodeffect and the like.

Description

technical field [0001] The invention relates to the technical field of surface wind farms, and relates to an index evaluation method for the simulation reliability of an equivalent model of a doubly-fed wind farm. Background technique [0002] In the power system, the index evaluation of the simulation reliability of the equivalent model of double-fed wind farm has been applied. However, as the proportion of high-proportion renewable energy in the power system continues to increase, the reliability of the simulation model has an increasingly prominent impact on the dynamic simulation results of the power system. The penetration rate of renewable energy represented by wind power The continuous increase of , the operation of the power system is more complex, and its dynamic characteristics will also change, and the effectiveness of the equivalent model of the wind farm has an increasingly prominent impact on the credibility of the dynamic simulation of the power system, and th...

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