Fault Equivalent Modeling of Doubly Fed Wind Farm Based on Improved K-means Algorithm

被引：0

作者：

Jia K. ^{[1
]}

Kong F. ^{[1
]}

Zhang Y. ^{[1
]}

Wen Z. ^{[1
]}

Zhang J. ^{[2
]}

Bi T. ^{[1
]}

机构：

[1] State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, North China Electric Power University, Changping District, Beijing

[2] Northwest Branch of State Grid Corporation of China, Shaanxi Province, Xi’an

来源：

Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 10期

关键词：

comprehensive criterion of number of clusters; improved K-means algorithm; multi-machine equivalent modeling of DFIG wind farm; short-circuit current calculation;

D O I：

10.13335/j.1000-3673.pst.2022.1463

中图分类号：

学科分类号：

摘要：

The methods for the fault modeling and analysis of the renewable energy stations are the basis of the fault characteristics and protection researches in the wind power and photovoltaic centralized grid connected areas. The multi-machine equivalent modeling in the stations mostly adopts the clustering algorithm. However, the traditional algorithm clusters based on the similarity of the operating states between the units, but classifying the units with high similarity into one class is not equivalent to higher accuracy of the model. Therefore, this paper first analyzes the influencing factors of the fault current of the doubly fed induction generator (DFIG) and takes it as the clustering index to propose an improved K-means algorithm. This algorithm takes the equivalent errors of the fault current of the units as the sample spacing, and the equivalent electrical quantity of the units divided into the same kind as the clustering center coordinate of the algorithm; Combined with the equivalent errors of the DFIG and the contour coefficient of the clustering algorithm, the number of the clusters of the algorithm is adjusted, and the multi-machine equivalent model of the doubly fed wind farm is constructed to improve the efficiency and accuracy of the network short-circuit calculation. The simulation results verify the rationality of the clustering criterion proposed in this paper. Compared with the single machine equivalent model and the multi- machine equivalent model obtained by the traditional K-means algorithm, the accuracy of the proposed method is improved to a certain extent. © 2023 Power System Technology Press. All rights reserved.

引用

页码：4161 / 4169

页数：8

共 27 条

[21] HUANG Wei, ZHANG Xiaozhen, Feature analysis based equivalent modeling for large-scale wind farms[J], Power System Technology, 37, 8, pp. 2271-2277, (2013)
[22] PAN Xueping, ZHANG Chi, JU Ping, Coherency-based dynamic equivalence of wind farm composed of doubly fed induction generators[J], Power System Technology, 39, 3, pp. 621-627, (2015)
[23] ZHA Xiaoming, LIAO Shuhan, HUANG Meng, Dynamic aggregation modeling of grid-connected inverters using Hamilton's-action-based coherent equivalence[J], IEEE Transactions on Industrial Electronics, 66, 8, pp. 6437-6448, (2019)
[24] YANG Guosheng, WANG Zengping, Short-circuit current calculation method of DFIGWT considering entire LVRT process[J], Power System Technology, 42, 7, pp. 2185-2192, (2018)
[25] CHANG Yuanzhu, HU Jiabing, TIAN Xu, Characteristics analysis to DFIG-based wind Turbine’s stator current during crowbar protection and symmetrical fault by operational inductance[J], Proceedings of the CSEE, 39, 21, pp. 6192-6199, (2019)
[26] XU Kehan, ZHANG Zhe, LIU Huiyuan, Study on Fault Characteristics and its related impact factors of photovoltaic generator[J], Transactions of China Electrotechnical Society, 35, 2, pp. 359-371, (2020)
[27] WANG Zengping, Jing LI, ZHENG Tao, Calculation and analysis of transient short circuit current of doubly-fed induction generator considering convertor current limitation and GSC current [J], Transactions of China Electrotechnical Society, 33, 17, pp. 4123-4135, (2018)

← 1 2 3 →