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This paper deals with the scalable and transformerless Modular Multilevel Converter (MMC). A new modulation algorithm for this converter is presented, together with a Matlab-Simulink simulation based validation, of eight sub-module single phase MMC. In addition, the capacity of the proposed modulation to operate at high power applications with high number of sub-modules is demonstrated, by means of...
This paper describes first the mathematical model of the Modular Multilevel Converter with n submodules based on differential equations. Secondly, by using this model the simulation block diagram in Simulink is presented. After that, the special output AC voltage control of this converter is analysed, considering the capacitors' voltage control loop that usually is included in this topology. The modulation...
Pancreas transplantation is nowadays the only treatment to reestablish normal blood glucose in diabetic patients. Moreover, transplantation may also prevent and possibly even revert diabetes-related complications. We present our results with the first 4 years of a pancreas transplantation program. From February 2000 to June 2004, we performed 43 pancreas transplants in 42 recipients. In all cases...
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