Flexible PCC Voltage Unbalance Compensation Strategy for Autonomous Operation of Parallel DFIGs

被引：34

作者：

Wang, Tao ^{[1
]}

Nian, Heng ^{[1
]}

Zhu, Z. Q. ^{[2
]}

Huang, Hongyang ^{[3
]}

Huang, Xiaoming ^{[3
]}

机构：

[1] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China

[2] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England

[3] State Grid Zhejiang Elect Power Co, Elect Power Res Inst, Hangzhou 310014, Zhejiang, Peoples R China

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2017年 / 53卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Autonomous; doubly fed induction generator (DFIG); parallel; virtual admittance; voltage unbalance; SECONDARY CONTROL;

D O I：

10.1109/TIA.2017.2696491

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

This paper proposes a flexible compensation strategy for parallel-connected doubly fed induction generators (DFIGs) when connected to an unbalanced weak grid. The proposed strategy has two main advantages, the voltage unbalance factor at the point of common coupling (PCC) can be continuously controlled, thus, the flexible tradeoff between the balanced DFIG output current and the balanced PCC voltage can be achieved, and the negative sequence current required by the compensation can be properly shared among the parallel DFIGs and their grid side converters according to their respective operation conditions without the need of real-time communication. The operation performance and stability of the proposed strategy are analyzed. Simulation and experimental results are carried out to verify the proposed compensation strategy.

引用

页码：4807 / 4820

页数：14

共 23 条

[1]

Secondary Control Strategies for Frequency Restoration in Islanded Microgrids With Consideration of Communication Delays [J].