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This work presents a boost converter design methodology for active power factor correction, using finite control set model-based predictive control (FCS-MPC) for current control. Moreover, an external proportional integrative (PI) voltage control loop design methodology is explained. This paper also compares the conventional PI current control with MPC current for this application, both in transient...
This paper presents the modelling and control strategy for a new high-power multilevel multipulse medium frequency-isolated dc-dc converter. The new converter is composed by a Modular Multilevel Converter (MMC) associated to an isolated Multipulse Rectifier (MR). Its application is targeted to non-conventional distribution and sub-transmission systems, while operating at tens of kVs and a few MWs...
This work presents the modeling of the control loop for the Five Level (5L) T-Type Neutral-Point Clamped (NPC) converter, for grid-tie photovoltaic application. The control system includes the converter output current control loop and the differential voltage control loop of the input voltage. The results are evaluated by means of a 3kW prototype.
The study of a totally passive snubber applied to the T-type NPC converter is presented in this paper. The snubber circuit aids all commutations in all the switches. The voltage across the switches is clamped in a value close to half of the total input voltage. The description of the operation is presented in this paper.
The drawbacks of conventional Modular Multilevel Converters (MMC) are described in terms of short-circuits. The configuration of MMC-transformer-MMC proves to handle short-circuits at the input and output without the need for additional DC or AC circuit breakers for protection. The transformer can be operated with a higher frequency, reducing therefore the size of the transformer and the capacitors...
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