Active Damping for PMSG-Based WECS With DC-Link Current Estimation

被引：113

作者：

Geng, Hua ^{[1
]}

Xu, Dewei ^{[1
]}

Wu, Bin ^{[1
]}

Yang, Geng ^{[2
]}

机构：

[1] Ryerson Univ, Dept Elect & Comp Engn, Toronto, ON M5B 2K3, Canada

[2] Tsinghua Univ, Automat Dept, Beijing 100084, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2011年 / 58卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Active damping; dc-link current estimation; permanent-magnet synchronous generator (PMSG); torsional oscillation; wind-energy conversion system (WECS); ENERGY-CONVERSION; WIND TURBINES; VOLTAGE; SYSTEM; STRATEGIES; FLICKER; DESIGN; SCHEME;

D O I：

10.1109/TIE.2010.2040568

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

An active-damping strategy is proposed for the suppression of speed and torsional oscillations in permanent-magnet synchronous generator (PMSG)-based wind-energy conversion systems (WECSs). Direct-driven configuration with PMSG is an attractive choice for WECS because of the gearbox elimination and cost reduction due to small pole-pitch design. However, speed and torsional oscillations appear when the generator is directly connected to the wind turbine without any assistant damping device. Based on small-signal analysis, a low-bandwidth design for the power or generator torque controller of PMSG can help to reduce the oscillation amplitude, but the system dynamic performance is thus sacrificed. From the power-flow's point of view, the oscillation is reflected in the dc-link current. With the help of switch function modeling based on the space-vector-modulation scheme, the average dc-link current can be estimated and applied to the compensation strategy, which provides positive damping resulting in stability improvement. The simulation and experiment results verify the theoretical analysis and the validation of the proposed strategy.

引用

页码：1110 / 1119

页数：10

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