• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2022, Vol. 43 ›› Issue (7): 121-130.doi: 10.12204/j.issn.1000-7229.2022.07.014

• New Energy Power Generation • Previous Articles     Next Articles

Virtual Inertia Control Strategy of Bidirectional Grid-Connected Converter Applying Multiple Sliding Mode Variable Structure Control

LIU Yancheng(), LÜ Xu(), ZHANG Qinjin(), HU Wangbao(), ZHANG Hanwen()   

  1. Marine Engineering College, Dalian Maritime University, Dalian 116026, Liaoning Province, China
  • Received:2021-11-26 Online:2022-07-01 Published:2022-06-30
  • Contact: LÜ Xu E-mail:lcy3@163.com;lvxu0717@163.com;zqj18@qq.com;251362936@qq.com;zhanghanwen0132@163.com
  • Supported by:
    National Natural Science Foundation of China(51709028);National Natural Science Foundation of China(51979021)


Aiming at the problems of low inertia and poor anti-interference ability of bus voltage in DC microgrid, a virtual inertia control strategy based on multiple sliding mode variable structure control is proposed in this paper. Sliding mode current control based on the index reaching law is adopted in the inner loop, which can quickly track the given value of grid-connected current and improve the response speed of the system. Virtual inertia control equation and voltage sliding mode surface structure are established in the outer loop to enhance the inertia of the DC microgrid and suppress the fluctuation of the DC bus voltage. The stability of bidirectional grid-connected converter under the proposed control strategy is proved by small-signal disturbance method and Nyquist criterion. Finally, the corresponding simulation model and StarSim HIL hardware-in-the-loop experimental platform are built. The results show that, compared with the traditional virtual inertia control strategy based on PI control and passivity-based control, the proposed control strategy has better dynamic and static characteristics, and improves the stability of the DC bus voltage.

Key words: DC microgrid, bidirectional grid-connected converter, multiple sliding mode variable structure control, virtual inertia control

CLC Number: