Research on Double-Fed Induction Generator Low Voltage Ride Through Based on Double Braking Resistors Using Fuzzy Control

被引：6
|
作者：
Dong, Hao [1 ]
Wu, Hongbin [1 ]
Pan, Jing [2 ]
Chen, Yu [2 ]
Xu, Bin [2 ]
机构：
[1] Hefei Univ Technol, Sch Elect Engn & Automat, 193 Tunxi Rd, Hefei 230009, Anhui, Peoples R China
[2] State Grid Anhui Elect Power Co Ltd, Hefei 230061, Anhui, Peoples R China
来源：
ENERGIES | 2018年 / 11卷 / 05期
基金：
国家重点研发计划;
关键词：
double-fed induction generator; low-voltage ride through; series dynamical braking resistor; double resistor switching; fuzzy control; CONTROL STRATEGY; WIND TURBINES; PERFORMANCE; DFIG;
D O I：
10.3390/en11051155
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The stator side of a double-fed induction generator (DFIG) is directly connected to the grid, so the DFIG is sensitive to a voltage drop caused by power system faults. A double resistors braking method based on fuzzy control is proposed to improve the performance of low-voltage ride through (LVRT) in this paper. Based on the mathematical model of DFIG, it analyzes the function of a series dynamical braking resistor (SDBR) theoretically. The series impedance value of the SDBR is determined by the variation of the rotor's open circuit voltage, the voltage and current of the stator and the rotor, and also the heat capacity of the SDBR. In order to improve the LVRT capability of a DFIG under different fault grads, a double series resistors braking mode is presented. Through adopting a fuzzy control strategy, double series resistor switching is implemented. With the example system, the correctness and validity of the proposed method is verified.
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页数：16
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