A small-scale standalone wind energy conversion system featuring SCIG, CSI and a novel storage integration scheme

RENEWABLE ENERGY

卷:89

Article

Alnasir, Zuher¹  Kazerani, Mehrdad¹ 

[1] Univ Waterloo, Elect & Comp Engn, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

关键词: Current-source inverter;    Energy storage;    Squirrel-cage induction generator;    Small-scale;    Standalone;    Wind energy;   

DOI  :  10.1016/j.renene.2015.12.041

来源: Elsevier

【 摘 要 】

In this paper, a small-scale standalone wind energy conversion system composed of a squirrel-cage induction generator, a buck converter and a current-source inverter is proposed, as an attractive renewable energy solution for off-grid communities. Geared squirrel-cage induction generators are well-known for their robustness, simplicity, light weight and low cost. Current-source inverters, even though mainly used in medium-voltage, high power applications, and proposed for megawatt-level grid-connected wind energy conversion systems, offer potential benefits in small-scale off-grid wind energy conversion systems that are yet to be investigated and evaluated against those of commonly-used voltage-source inverters. In the proposed system, the generator's shaft speed is controlled by a buck converter to extract maximum available wind power in normal mode of operation, and the wind power is dumped when it is not possible to absorb maximum available power by the storage system and the load. A novel scheme for integration of a battery energy storage system is proposed and an effective power management algorithm is employed to maintain the supply-demand power balance through direct control of dc-link current. A systematic approach for the dc-link inductor design is presented. The feasibility of the proposed system and its performance under variable wind and load conditions are analyzed and demonstrated through simulation. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free