TITLE:
Stop Control Strategy of Modular Multilevel Converter Based HVDC System
AUTHORS:
Chengjun Xia, Bingmei Jin, Junjun Liang, Meng Li
KEYWORDS:
Modular Multilevel Converter (MMC), Stop Control, Energy Feedback
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.9,
September
17,
2014
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.