Dynamic equivalent modeling method of doubly-fed wind farm suitable for analysis of active power characteristics

Abstract

The invention discloses a doubly-fed wind farm dynamic equivalent modeling method suitable for the analysis of active power characteristics, which selects five indexes that can reflect the dynamic characteristics of DFIG active power, and collects the active power output characteristics of each doubly-fed wind power generating set in real time The index constitutes a data object, sets different clustering numbers, clusters the data objects using the fuzzy C-means clustering algorithm, calculates the Xie-Beni index of the clustering results obtained by different clustering numbers, and selects the minimum Xie-Beni index The corresponding clustering number is taken as the optimal clustering number, and the corresponding clustering result is the grouping result of the DFIG of the DFIG wind farm. The parameters of the system are equivalently aggregated to obtain the equivalent model of the DFIG wind farm. The invention comprehensively considers the factors affecting the DFIG active power output, and can obtain the dynamic equivalent model of the doubly-fed wind farm system that more accurately reflects the active power characteristics of the real doubly-fed wind farm system.

Description

technical field [0001] The invention belongs to the technical field of power system simulation modeling, and more specifically relates to a dynamic equivalent modeling method of a doubly-fed wind farm suitable for active power characteristic analysis. Background technique [0002] With the continuous increase of grid-connected doubly-fed wind farm capacity, the impact of output fluctuations caused by the intermittent and random nature of wind energy on the power system has become increasingly prominent. It is very important to establish a suitable dynamic model of DFIG wind farm, analyze the active power output characteristics of DFIG wind farm with real-time simulation, evaluate the impact of its access to the power system, and provide guidance for the research of active power control algorithms. Significance. However, unlike traditional power stations, DFIG wind farms are composed of multiple doubly-fed wind turbines (Double-Fed Induction Generators, DFIGs) with small cap...

AI Technical Summary

Problems solved by technology

As the proportion of doubly-fed wind farms in power generation continues to increase, the importance of studying its dynamic equivalent model suitable for the analysis of active power characteristics will become more and more prominent. Research on Equivalent Modeling Method of Feed Wind Farm

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