Accurate power sharing control strategy of multiple virtual synchronous generators in independent micro-grid

被引：0
|
作者：
Yuan J. [1 ]
Yang W. [1 ]
机构：
[1] College of Automation, Nanjing University of Science and Technology, Nanjing
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2019年 / 47卷 / 04期
关键词：
Double resonant loop; Micro-grid; Power sharing; Reactive power control; Virtual synchronous generator (VSG);
D O I：
10.7667/PSPC180292
中图分类号：
学科分类号：
摘要：
To provide inertia and damping for the system and to improve the stability of voltage and frequency in independent micro-grid, Virtual Synchronous Generator (VSG) control strategy of inverters is recommended, which mimics synchronous generators. However, the traditional VSG parallel system is challenged by rational distribution of reactive power and DC suppression. Firstly, the accurate power sharing mechanism of VSG is analyzed based on the principle of VSG. Besides, an improved reactive power control method is proposed from the angle of voltage compensation to construct the integrator, which can realize the decoupling of reactive power distribution and line impedance. Furthermore, the double loop control is redesigned to suppress the DC by using the quasi resonant controller. At the same time, the method of parameter matching is studied to ensure the accurate power sharing of VSG. Finally, the validity and effectiveness of the proposed VSG control are verified by Matlab simulation. © 2019, Power System Protection and Control Press. All right reserved.
引用
收藏
页码：35 / 42
页数：7
相关论文
共 21 条
  • [1] Yang X., Su J., Lu Z., Et al., Overview on micro-grid technology, Proceedings of the CSEE, 34, 1, pp. 57-70, (2014)
  • [2] Wang Z., Chen B., Wang J., Et al., Decentralized energy management system for networked microgrids in grid-connected and islanded modes, IEEE Transactions on Smart Grid, 7, 2, pp. 1097-1105, (2016)
  • [3] Guo W., Mu L., Control principles of micro-source inverters used in microgrid, Protection and Control of Modern Power Systems, 1, 1, pp. 56-62, (2016)
  • [4] Zhang D., Chen J., Zhang R., Et al., Energy dispatching of DC microgird based on pv generation prediction, Smart Power, 46, 2, pp. 28-33, (2018)
  • [5] Xu J., Zhao C., A coherency-based equivalence method for MMC inverters using virtual synchronous generator control, IEEE Transactions on Power Delivery, 31, 3, pp. 1369-1378, (2016)
  • [6] Lu Z., New pattern of source-grid-load friendly interaction based on virtual synchronous machine technology, Distribution & Utilization, 34, 2, (2017)
  • [7] Zhang C., Yang Y., Yuan X., Et al., Modeling method of virtual synchronous machine considering damping and inertia, Electric Power Engineering Technology, 37, 5, pp. 45-49, (2018)
  • [8] Zheng T., Chen L., Chen T., Et al., Technology and prospect of virtual synchronous generator, Automation of Electric Power Systems, 39, 21, pp. 165-175, (2015)
  • [9] Xu S., Li J., Hui D., Stability analysis and control strategy of parallel storage inverter system working under the micro-gird's island condition, High Voltage Engineering, 41, 10, pp. 3266-3273, (2015)
  • [10] Chen G., Jiang S., Ding Y., Et al., Zero-sequence circulating current reduction for parallel T-type three-level power converter systems, Electric Power Engineering Technology, 36, 5, pp. 52-58, (2017)
123