An AC/DC Hybrid Distribution Network Structure Based on Multiterminal VSC

doi:10.3969/j.issn.1000－7229.2016.12.006

Abstract

Abstract: With the rapid development of distributed generation and changes of loads, traditional radical AC distribution network is confronted with many problems. With the technology of multiterminal VSCs (voltage source converters), this paper builds the AC/DC hybrid distribution network through adding DC-link to AC distribution network, proposes the network structure of AC/DC hybrid distribution network and theoretically analyzes its control strategy. Finally, this paper constructs the simulation model by Matlab/Simulink to simulate and verify the network structure and control strategy. The simulation results show that through the rational control of VSCs, the voltage distribution and load carrying capacity of existed AC distribution lines can be improved effectively, and the power flow can be controlled flexibly, therefore, the resources can be allocated appropriately. Moreover, the DC-link of AC/DC hybrid distribution network can be a part of future DC distribution network so that the distribution network can be transitioned smoothly from traditional AC to DC.

Key words: multiterminal VSC, AC/DC hybrid distribution network, network structure, control strategy

CLC Number:

TM 727

YAN Xiao, JIAO Yanjun, DU Zhe. An AC/DC Hybrid Distribution Network Structure Based on Multiterminal VSC[J]. Electric Power Construction, 2016, 37(12): 48-.

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