AC Port Voltage Control Strategy and Stability Analysis of Flexible Distribution Equipment Based on Virtual Synchronous Generator

被引：0
作者：
Li Z. [1 ]
Sheng W. [2 ]
Du S. [1 ]
Li P. [2 ]
Wang J. [3 ]
机构：
[1] College of Information and Electrical Engineering, China Agricultural University, Beijing
[2] Beijing Key Laboratory of Distribution Transformer Energy-saving Technology (China Electric Power Research Institute), Beijing
[3] School of Electrical Engineering, Southeast University, Nanjing
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 08期
关键词：
Current feedforward; Flexible distribution equipment (FDE); Stability analysis; Virtual synchronous generator (VSG); Voltage stability;
D O I：
10.7500/AEPS20190812008
中图分类号：
学科分类号：
摘要：
Supplying power for loads and realizing the connection of distributed generators (DGs) are the essential functions of the flexible distribution equipment (FDE). Consequently, the control of AC port in FDE is intensely crucial. Aiming at the AC port voltage control of FDE, the three-phase voltage is controlled independently based on the virtual synchronous generator (VSG) control, and its dynamic performance is improved by cascaded quasi proportional-resonant (PR) voltage outer-loop and current inner-loop. Furthermore, the influence of AC port output current of FDE on the voltage is analyzed in detail by taking single-phase voltage as an example. And the current feedforward control strategy is proposed to ensure the AC port voltage stability while loads vary and DG access. The output impedance of AC port is obtained by the impedance modeling method, and the stability of FDE is analyzed by generalized Nyquist stability criterion when AC port supplies power for loads and realizes DG connection. Finally, the correctness and effectiveness of the proposed control strategy are verified by simulation and experiment. © 2020 Automation of Electric Power Systems Press.
引用
收藏
页码：141 / 148
页数：7
相关论文
共 20 条
  • [1] She X., Burgos R., Wang G.Y., Et al., Review of solid state transformer in the distribution system: from implementation to filed application, IEEE Energy Conversion Congress and Exposition (ECCE), pp. 4077-4084, (2012)
  • [2] Huang A.Q., Crow M.L., Heydt G.T., Et al., The future renewable electric energy delivery and management (FREEDM) system: the energy Internet, Proceedings of the IEEE, 99, 1, pp. 133-148, (2011)
  • [3] Mao C., Wang D., Fan S., Et al., Power Electronic Transformer, (2010)
  • [4] Zhang H., Jing L., Wu X., Et al., Control strategy for autonomous operation of power electronic transformer, Automation of Electric Power Systems, 42, 4, pp. 89-94, (2018)
  • [5] Tian B., Lei J., Guo X., Et al., Main circuit structure and function simulation of multi-interface energy router, Automation of Electric Power Systems, 41, 10, pp. 16-21, (2017)
  • [6] Zong S., He X., Wu J., Et al., Overview of power electronics based electrical energy router, Proceedings of the CSEE, 35, 18, pp. 4559-4570, (2015)
  • [7] He X., Zong S., Wu J., Et al., Technologies of power electronic equipment interconnecting and networking in distribution grids, Proceedings of the CSEE, 34, 29, pp. 5162-5170, (2014)
  • [8] Sheng W., Duan Q., Liang Y., Et al., Research of power distribution and application grid structure and equipment for future energy internet, Proceedings of the CSEE, 35, 15, pp. 3760-3769, (2015)
  • [9] She X., Yu X., Wang F., Et al., Design and demonstration of a 3.6 kV-120 V/10 kVA solid state transformer for smart grid application, IEEE Transaction on Power Electronics, 29, 8, pp. 3982-3996, (2014)
  • [10] Xu S., Li J., Hui D., Stability analysis of energy storage inverter based on quasi PR controller under off-grid mode, Automation of Electric Power Systems, 39, 19, pp. 107-112, (2015)
12