Transient Stability Analysis and Improved Control Strategy for DC-Link Voltage of DFIG-Based WT During LVRT

被引：25

作者：

Chen, Shiyue ^{[1
]}

Yao, Jun ^{[1
]}

Pei, Jinxin ^{[2
]}

Liu, Yuan ^{[3
]}

Liu, Ruikuo ^{[4
]}

Huang, Sen ^{[1
]}

Chen, Zhaoyang ^{[1
]}

机构：

[1] Chongqing Univ, Sch Elect Engn, State Key Lab Power Transmiss Equipment & Amp Sys, Chongqing 400044, Peoples R China

[2] Chongqing Jialing Huaguang Photoelect Technol Co, Chongqing 400700, Peoples R China

[3] State Grid Wuxi Power Supply Co, Wuxi 214000, Jiangsu, Peoples R China

[4] China Three Gorges Corp, Inst Sci & Technol, Beijing 100089, Peoples R China

来源：

IEEE TRANSACTIONS ON ENERGY CONVERSION | 2022年 / 37卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Voltage control; Transient analysis; Phase locked loops; Power system stability; Stability analysis; Doubly fed induction generators; Damping; Dc-link voltage; doubly-fed induction generator; low voltage ride through; transient stability; WIND TURBINES; ENHANCEMENT; CONVERTERS; CONVERSION; GENERATOR; SYSTEM; PLL;

D O I：

10.1109/TEC.2021.3126855

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：

In this paper, the transient stability for dc-link voltage of doubly-fed induction generator (DFIG)-based wind turbine (WT) is studied in detail during low voltage ride-through (LVRT). Firstly, referring to the rotor swing equation of synchronous generator (SG), the nonlinear large-signal model of dc-link voltage is established. In addition, the damping power, static slip power, and dynamic slip power are derived. Consequently, the transient performance of dc-link voltage under the different operation conditions of DFIG is revealed during LVRT. Furthermore, the instability form of dc-link voltage with the moving process of equivalent power angle is analyzed by the energy function of dc-link voltage. In addition, the impacts of dc voltage control loop's parameter, the active current of the stator, and the slip on the stabilization process of dc-link voltage are studied. Analysis result indicates that the insufficient damping and large unbalanced power would deteriorate the transient behavior and steady-state level of dc-link voltage. Therefore, an additional damping and slip power feedforward control strategy is proposed, which can make the transition process of dc-link voltage smoother and significantly improve the voltage steady-state level. Finally, simulation and experimental results validate the effectiveness of theoretical analysis.

引用

页码：880 / 891

页数：12

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