Double-fed unit wind power plant dynamic equivalence modeling system and method based on simplified models

Abstract

The invention relates to the technical field of wind power plant equivalence modeling, in particular to a double-fed unit wind power plant dynamic equivalence modeling system and method based on simplified models. Compared with the prior art, the double-fed unit wind power plant dynamic equivalence modeling system and method have the advantages that the converter model in a double-fed wind power generation system is simplified, and the calculation time consumption is greatly lowered. The unit distribution area based on the homology method is used as a grouping index, and applicability to equivalence modeling of wind power plants in different terrains is achieved; parameters, calculated through a capacity weighting method, of equivalence units are wind power plant equivalence, suitable for double-fed units of various types, of the equivalence method. Equivalence is conducted on wind turbines according to the principle of capture wind energy equivalence, and visibility is better achieved.

Description

technical field [0001] The invention relates to the technical field of equivalent modeling of wind farms, in particular to a system and method for dynamic equivalent modeling of wind farms based on simplified models of double-fed generator sets. Background technique [0002] With the rapid development of wind power technology, large wind farms and groups of wind farms have been formed. Compared with conventional power generation such as thermal power and hydropower, the primary energy of wind power has great random fluctuations, and its control methods and dynamic responses are also very different. When large-scale wind power is connected to the grid, it may have adverse effects on grid planning, power quality, and safe and stable operation of the grid. [0003] Therefore, more and more power grid companies at home and abroad have put forward higher requirements for large-scale wind farms connected to the power grid, such as: active power control capability, reactive power ...

AI Technical Summary

Problems solved by technology

[0005] Scholars at home and abroad have proposed various dynamic equivalent methods for wind power grid-connected systems, but so far there is still a lack of ideal equivalent methods

Most of the existing studies focus on one aspect of wind farm equivalence, but the equivalence method of each link of the whole equivalence modeling of wind farm integrated into the system has not been given a detailed and specific introduction. Targeted system modeling research

Images