%0 Electronic Article
%A Jianpo Zhang
%A Chuan Jiang
%A Chongchong Chen
%K different operation modes
%K half bridge topology
%K storage capacitor voltage balance
%K control strategies
%K full bridge MMC flexible operation
%K DC line fault
%K reduced DC voltage operation
%K full-bridge MMC
%K full bridge sub-module topologies
%K reactive power
%K long-distance overhead line
%K EMTDC
%K sub-module capacitor voltage
%K PSCAD
%K power devices
%K output characteristics
%K constant power
%K different operating modes
%K flexible control
%K DC-link fault current suppression
%K positive voltage output
%K negative voltage output
%K reduced power transmission
%K zero voltage output characteristic
%K insulation reduction
%K DC voltage operation
%K low voltage operation
%X Although full bridge sub-module topologies require more power devices than half bridge topology, it can offer flexible control of positive, negative, and zero voltage output characteristics. Here, full-bridge MMC with three kinds of operating modes as positive, negative voltage output with low voltage operation, and DC-link fault current suppression with zero voltage output are studied. To deal with the problem of insulation reduction when long-distance overhead line is applied and reduced DC voltage operation is required when LCC is connected with MMC, the effect of constant power and reduced power transmission on the storage capacitor voltage balance are studied. What is more, the zero voltage output characteristic is also studied not only to avoid the problem that the sub-module capacitor voltage may diverge due to long time blocking converter during DC line fault but also to supply reactive power for AC grid. Control strategies are designed under different operating modes to achieve full bridge MMC flexible operation. Finally, a simulation model is built in PSCAD/EMTDC to simulate the output characteristics of full-bridge MMC in different operation modes.
%T Research of control strategies of MMC based on full bridge sub-modules
%B The Journal of Engineering
%D October 2018
%I Institution of Engineering and Technology
%U https://digital-library.theiet.org/;jsessionid=aaypt9qk5qdp.x-iet-live-01content/journals/10.1049/joe.2018.8662
%G EN