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A new class of modular multilevel dc/dc converters has recently emerged that eliminates the traditional full-rated intermediate ac stage inherent to two-stage dc/dc converter structures, that is, two cascaded dc/ac modular multilevel converters (MMCs). This paper introduces the first averaged dynamic state-space model for this new class of single-stage dc/dc converter, called the DC-MMC, which captures...
This paper derives the mathematical expression for the minimum excitation capacitance of self excited induction generator under different types of load and speed, and also studies the performance of a self-excited induction generator (SEIG) driven by a prime mover. Mathematical model of the isolated SEIG under balanced loading conditions in d-q stationary reference frame is developed to study the...
The development on PV applications along with recent breakthroughs in power electronics has became in a strong research area especially in modeling and control techniques. This paper presents an analysis of grid-connected photovoltaic systems using three different high-order dc/dc topologies: Cuk converter, SEPIC converter and Zeta converter. This work considers ideal PV systems and a voltage load...
The load current of three level/phase neutral point clamped rectifier could be expressed in two forms: the load current involving the current of capacitor C1, and the load current involving the current of capacitor C2. Using the Euler-Lagrange model based on the superposition law and the obtained load current, a new dual Lagrangian model of the rectifier is founded in this paper and then the two obtained...
At SEPIC converter there are no equations which summarize the overall behaviour of this circuit converter. Determining factors like the throughput power of the circuit and peak voltages and currents, means developing a computer model. In this model the operation of the circuit is broken down into its separated modes and the appropriate equations derived for each of theme. For all modes the time function...
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