Applicability Analysis of Probabilistic Power Flow Calculation Method in AC/DC Hybrid Grid

Yang, Xiaonan; Li, Yanying; Luo, Guangzhao; Deng, Xiaoyang; Wang, Xiaojun

doi:10.1109/cieec47146.2019.cieec-2019735

Cited by 2 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Power flow analysis is employed to ascertain load distribution, voltage stability, line power losses, and flow distribution of components such as generators, transformers, and transmission lines within the power system (Guoqing et al, 2017;Pengfei, 2022), plays a crucial role in microgrid planning, stability calculations, and fault analysis (Bajpai, 2023;Heidary et al, 2023;Huang et al, 2023;Li et al, 2023). Currently, commonly used power flow calculation methods for AC/DC microgrids include the unified iteration method (UIM) and the alternate iteration method (Nejabatkhah et al, 2019;Song et al, 2023). The alternate iteration method separately solves power flow for AC and DC subsystems, providing fast calculation speeds but relatively lower convergence accuracy.…”

Section: Introductionmentioning

confidence: 99%

The power flow algorithm for AC/DC microgrids based on improved unified iteration method

Dong,

Wang,

Zhang

et al. 2024

Front. Energy Res.

View full text Add to dashboard Cite

In response to the complexity of the Jacobian matrix inversion process in the power flow algorithm for AC/DC microgrids, leading to large memory requirements and susceptibility to convergence issues, a novel power flow algorithm based on an improved unified iteration method for AC/DC microgrids is proposed. Firstly, the fundamental equations of the unified iteration method and the characteristics of DC systems are analyzed. The reactive power correction terms and voltage phase correction differences are removed from the modified equations of the unified iteration method, and result in a reduction in the order of the Jacobian matrix in the power flow algorithm. Subsequently, the improved IEEE 11-node system is subjected to simulation verification to attain precise power flow solutions for hybrid AC/DC microgrids. The theoretical analysis identifies the main influencing parameters of active and reactive power errors and assesses their impact factors. Finally, experimental validation of the improved power flow algorithm is carried out on a physical platform, clarifying the applicability range of the proposed method. The research results indicate that within allowable error margins, the proposed approach reduces the difficulty of Jacobian matrix inversion, resulting in an 80% increase in computational speed compared to the unified iteration method. It is suitable for microgrid systems with short electrical distances and small magnitudes of node voltage amplitudes and phase differences.

show abstract