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The basic concept of a multilevel converter is to synthesize a staircase voltage wave-form by the use of several lower voltage DC sources. Capacitors, batteries, fuel cells and photovoltaic modules can be used as DC sources. A multilevel converter has several advantages, like a high voltage quality and low electromagnetic compatibility problems. Two different modulation schemes for multilevel inverters...
Multilevel converters need voltage balancing to be able to generate an output voltage with high quality. Flying capacitor converter topology has a natural voltage balancing property. Voltage balance dynamics analytical research methods reported to date are essentially based on a frequency domain analysis using double Fourier transform. These complicated methods are not truly analytical, which makes...
The unified power flow controller (UPFC) is nowadays one of the most useful Flexible AC Transmission Systems (FACTS), allowing the simultaneous control of the bus voltage and line active and reactive power. This paper presents the model, cross-coupling free current mode control approach, simulations and experimental results in static and dynamic conditions of a current mode controller for the UPFC...
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