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Transient Voltage Stability Analysis of the Dual-Source DC Power System

Author

Listed:
  • Yi Lei

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Yang Li

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Feng Zhao

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Yelun Peng

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Zhen Mei

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

  • Zhikang Shuai

    (College of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

Abstract

This paper analyzes the transient voltage stability of the dual-source DC power system. The system’s equivalent model is first established. Subsequently, the effect mechanisms of line parameters and voltage-source rectifiers’ current control inner loops on the system’s transient voltage instability are investigated. It indicates that these factors reduce the power supply capacity of the source, increasing the risk of transient instability in the system. Then, considering the influence of fault depths, the influence of different large disturbances on the transient voltage stability is investigated. Furthermore, the critical cutting voltage and critical cutting time for DC power systems are determined and then validated on the MATLAB R2023b/Simulink platform. Finally, based on the mixed potential function theory, the impact of system parameter variations on stability boundaries is analyzed quantitatively. Simulation verification is conducted on the MATLAB R2023b/Simulink platform, and experimental verification is conducted on the RT-LAB Hardware-in-the-Loop platform. The results of the quantitative analysis and experiments corroborate the conclusions drawn from the mechanistic analysis, underscoring the critical role of line parameters and converter control parameters in the system’s transient voltage stability.

Suggested Citation

  • Yi Lei & Yang Li & Feng Zhao & Yelun Peng & Zhen Mei & Zhikang Shuai, 2025. "Transient Voltage Stability Analysis of the Dual-Source DC Power System," Energies, MDPI, vol. 18(14), pages 1-21, July.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:14:p:3663-:d:1699138
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