Circulating current control strategy for parallel full‐scale wind power converters
| Autor: | Haisong Wang, Jinshui Dai, Xu Cai, Jianwen Zhang, Jing Lyu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
Wind power business.industry 020209 energy 020208 electrical & electronic engineering Full scale Feed forward 02 engineering and technology Converters Compensation (engineering) Power rating Control theory 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering business MATLAB computer computer.programming_language |
| Zdroj: | IET Power Electronics. 9:639-647 |
| ISSN: | 1755-4543 |
| DOI: | 10.1049/iet-pel.2014.0926 |
| Popis: | Converter parallel techniques can increase the power rating, but there is a circulating current problem. Therefore, this study focuses on the circulating current problem in parallel full-scale wind power converter systems. The general definition of circulating currents is first introduced. The concept of circulating current percentage is then defined to quantitatively analyse the relatively serious situation of circulating currents for parallel converter systems. Then, the generation mechanisms of circulating currents are analysed based on the mathematical model of circulating currents. Actually, circulating currents can be regarded as a kind of disturbance to the load currents of a parallel system. Thereby, a novel control strategy, based on circulating current feed-forward compensation for parallel converter systems, is proposed and a feed-forward controller is designed. Finally, simulations based on MATLAB/Simulink and hardware-in-loop experiments based on RT-LAB are carried out. Both simulation and experimental results validate the proposed circulating current control method. |
| Databáze: | OpenAIRE |
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