Advanced Vector Control for Voltage Source Converters Connected to Weak Grids

被引：233

作者：

Egea-Alvarez, Agust ^{[1
]}

Fekriasl, Sajjad ^{[2
]}

Hassan, Fainan ^{[2
]}

Gomis-Bellmunt, Oriol ^{[1
,3
]}

机构：

[1] Univ Politecn Cataluna, ETS Engn Ind Barcelona, Dept Elect Engn, Ctr Innovacio Tecnol Convertidors Estat & Acciona, E-08028 Barcelona, Spain

[2] Alstom Grid, Adv Res & Technol Ctr, Stafford, England

[3] Catalonia Inst Energy Res IREC, Elect Engn Area, Barcelona 08019, Spain

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2015年 / 30卷 / 06期

关键词：

Gain-scheduling control; stability; vector current control; VSC-HVDC; weak grid;

D O I：

10.1109/TPWRS.2014.2384596

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper addresses an advanced vector current control for a voltage source converter (VSC) connected to a weak grid. The proposed control methodology permits high-performance regulation of the active power and the voltage for the feasible VSC range of operation. First, the steady state characteristics for a power converter connected to a very weak system with a short circuit ratio (SCR) of 1 are discussed in order to identify the system limits. Then, the conventional vector control (inner loop) and the conventional power/voltage control (outer loop) stability and frequency responses are analyzed. From the analysis of the classic structure, an enhanced outer loop based on a decoupled and gain-scheduling controller is presented and its stability is analyzed. The proposed control is validated by means of dynamic simulations and it is compared with classic vector current control. Simulation results illustrate that the proposed control system could provide a promising approach to tackle the challenging problem of VSC in connection with weak AC grids.

引用

页码：3072 / 3081

页数：10

共 21 条

[1]

Ahmed N., 2011, P 2011 14 EUR C POW

[2]

[Anonymous], 1997, IEEE guide for planning DC links terminating at AC locations having low shortcircuit capacities

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