Control strategy for doubly-fed wind power system under unbalanced and harmonic distorted grid voltage conditions

被引：0

作者：

Yao, Jun ^{[1
]}

Chen, Zhiqian ^{[1
]}

Li, Qing ^{[1
]}

Yu, Mengting ^{[1
]}

Zhou, Te ^{[1
]}

Zhao, Lei ^{[1
]}

机构：

[1] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2014年 / 38卷 / 18期

关键词：

Allocation principles; Doubly-fed induction generator (DFIG); Harmonic distorted grid voltage; Proportional-integral double frequency resonance (PI-DFR) controller; Series grid-side converter (SGSC); Unbalanced grid voltage;

D O I：

10.7500/AEPS20131031003

中图分类号：

学科分类号：

摘要：

In view of the grid condition that the voltage at the grid connection point is unbalanced and contains fifth-and seventh-order harmonics, this paper presents an improved control strategy for a doubly-fed wind power system with series grid-side converter (SGSC) by coordinated control of the SGSC and parallel grid-side converter (PGSC). A proportional-integral double frequency resonance (PI-DFR) controller in the positive synchronous rotating reference frame during network unbalance and fifth-and seventh-order harmonics distortion is investigated. With the proposed control strategy, the stator and rotor currents are balanced distortion free and the generator's output power and electromagnetic torque pulsation free. While two-fold and six-fold frequency pulsations in the total active power output of the doubly-fed wind power system can be restrained. In addition, the allocation principles of the reference currents in the PGSC are studied when considering the current capacity of PGSC. Finally, simulation results of a 2 MW doubly-fed wind power system with SGSC under unbalanced and distorted grid voltage condition are used to verify the proposed control strategy and allocation principles of PGSC's reference currents. ©2014 State Grid Electric Power Research Institute Press

引用

页码：6 / 12

页数：6

共 18 条

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