高压电器2018，Vol.54Issue(5)：197-203,7.DOI:10.13296/j.1001-1609.hva.2018.05.031
直流微电网并网换流器的滑模变结构控制策略研究
Research on Sliding-mode Variable Structure Control Strategy of DC Microgrid Grid-connected Converter
杨晓萍 1张豪 1胡杨 1刘雨莎2
作者信息
- 1. 西安理工大学,西安 710048
- 2. 国网咸阳供电局,陕西 咸阳 712000
- 折叠
摘要
Abstract
The DC microgrid is through connecting the grid converter and the AC power grid, thus the bidirectional flow of power and the stability of the DC bus voltage are achieved. The paper focuses on the nonlinear and the wide range mutation of working point of the bidirectional DC/AC converter. A nonlinear control strategy of two stage bidirectional converter based on sliding-mode variable structure is proposed. First, the nonlinear mathematical mode of the high frequency two stage bidirectional converter is established, with control target constant DC voltage and unit power factor of AC grid and the state variables the voltage of DC side and the reactive current of AC grid. Second, the paper design the sliding-mode plane function and the variable structure control of the DC/AC and DC/DC. Finally, the paper set the simulation model of control system of the DC microgrid and analysis the system performance of the dynamic and steady state under the different working conditions to demonstrate the effectiveness of the proposed control strategy. The results show that sliding-mode variable structure control strategy has good performance of the dynamic and static and robustness for parameter change and state mutation of the system.关键词
直流微电网/两级式变换器/滑模变结构控制/动态性能Key words
DC microgrid/two stage bidirectional converter/sliding-mode variable structure control/dynamic performance引用本文复制引用
杨晓萍,张豪,胡杨,刘雨莎..直流微电网并网换流器的滑模变结构控制策略研究[J].高压电器,2018,54(5):197-203,7.
