In this paper a new topology of flying capacitor based multicell converter with reduced switches has been introduced. Compared with conventional multicell converters (Flying Capacitor Multicell and Stacked Multicell converters), the proposed converter doubles the number of output voltage levels and the RMS of output voltage by canceling the midpoint of DC source while the number of high frequen...

This paper compares four converter topologies for the implementation of flexible ac transmission system (FACTS) controllers: three multilevel topologies (multipoint clamped (MPC), chain, and nested cell) and the well-established multipulse topology. In keeping with the need to implement very-high-power inverters, switching frequency is restricted to line frequency. The study addresses device co...

This study presents space vector-based quasi-two-level operation of a diode-clamped multilevel inverter which improves dc link utilisation and output voltage quality, and avoids the dc link capacitor voltage balancing problem experienced with standard multilevel operation. Beside a review of quasi-two-level operation and the capacitor voltage balancing method, the study presents a detailed disc...

The most critical problem of the modular DC-DC converter (MDCC) is voltage balancing submodule (SM) capacitors, MDCC with stepped 2-level modulation has been developed and presents a good solution, however, this type many restrictions when there wide range capacitance tolerance SM capacitors that results inaccurate capacitor voltages balancing. To solve problem, paper discusses proposed method ...

Due to the modular structure and voltage scalable features, Modular Multilevel Converter (MMC) has become an alternative converter for high medium voltage-based transmission systems. Apart from this, MMC edible features in controlling real reactive power a high-voltage system compared conventional converter. However, some of technical challenges such as control complexity when subjected more le...

In modular multilevel converters (MMCs), tem5 perature control of semiconductor devices in the submod6 ules (SMs) is a key factor for the safe and reliable opera7 tion. Under normal operation, significant temperature differ8 ences can exist between SMs due to, for example, aging of 9 semiconductor modules and module parameter mismatch. 10 This paper presents a method for achieving SM thermal ba...

Battery management systems (BMS) are a key element in electric vehicle energy storage systems. The BMS performs several functions concerning to the battery system, its key task being balancing the battery cells. Battery cell unbalancing hampers electric vehicles’ performance, with differing individual cell voltages decreasing the battery pack capacity and cell lifetime, leading to the eventual ...