VSC HVDC control and protection system for Zhoushan five terminal project and simulation

摘要

Hierarchical design and control function configuragtion of multi-terminal VSC-HVDC control and protection system in Zhoushan five-terminal project are presented in this paper, a kind of improved multi-terminal stations DC bus voltage adaptive coordinated control function based on the DC bus voltage bias detection method is designed in this paper, which incorporate master/slave DC voltage control method and DC bus voltage bias detection strategy together in normal or abnormal communication situation among stations, and the simulation results are demonstrated, active charge control of sub-modules of arm bridge in multi-level converter are also presented in this paper. At the end of the paper, the hybrid real-time simulation system is constructed using the actual control and protection devices in the project. The proposed control strategy mentioned above are verified for the Zhoushan 5-terminal VSC HVDC, and the simulation results manifest that the presented control and protection configuration is practice and the presented control strategies are valid.