Stop Control Strategy of Modular Multilevel Converter Based HVDC System

Chengjun Xia, Bingmei Jin^*, Junjun Liang, Meng Li

College of Electric Power, South China University of Technology, Guangzhou, China.

DOI: 10.4236/jpee.2014.29026                

Abstract

The stop control strategy of modular multilevel converter based HVDC transmission system is proposed. This stop process is divided into stages of energy feedback and energy consumption. The DC voltage controller is coordinated to the used modules per phase when active power is transmitted prior to reactive power, so that the energy is fed back to the AC power grid connected to the converter station which uses the fixed dc voltage controller. In addition, in view of the different forms connected to the grid, specifically when the converter station supplies power for passive network, the passive converter station can take a certain auxiliary trigger strategy to make its maximum energy feedback to the grid. Finally, a simulation system of the MMC-HVDC system is constructed in Matlab/Simulink environment, and simulation results show that the proposed stop strategies are effective.

Keywords

Modular Multilevel Converter (MMC), Stop Control, Energy Feedback

Conflicts of Interest

The authors declare no conflicts of interest.

References

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