GOU Xin,LU Jiping,LIU Jialin,et al.Efficient electromagnetic transient simulation model of CH-MMC for AC-DC hybrid grid[J].Electric Power Automation Equipment,2019,39(09):213-219.
GOU Xin,LU Jiping,LIU Jialin,et al.Efficient electromagnetic transient simulation model of CH-MMC for AC-DC hybrid grid[J].Electric Power Automation Equipment,2019,39(09):213-219.DOI: 10.16081/j.epae.201909029.
Efficient electromagnetic transient simulation model of CH-MMC for AC-DC hybrid grid
Aiming at the large-scale and long-time calculation existing in the electromagnetic transient simulation for the detailed model of CH-MMC(Cell-Hybrid Modular Multilevel Converter) applied in AC-DC hybrid grid,an efficient simulation model of CH-MMC based on charge equalization of submodule capacitors is proposed. The equivalent circuits of the half-bridge and full-bridge submodules in normal and blocking states are analyzed respectively. Based on the numbers of half-bridge and full-bridge submodules in normal and blocking states,the equivalent circuits of half-bridge and full-bridge valve segments and the efficient simulation model of CH-MMC are derived. Furthermore,a voltage balancing method is proposed based on the proposed model,and the three-stage charging strategy is realized. Compared with the detailed model based on MATLAB/Simulink,accuracy and efficiency of the proposed model are validated by simulative results.
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