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Voltage-source converters need grid-side filters to connect to the grid. These grid-side filters on the one hand couple the converter-generated grid-side voltages to the grid voltages and on the other hand mitigate the influence of the switching of the power-electronic devices of the converter on the grid. While uncontrolled diode bridges usually couple via inductances (due to their low switching...
Flying capacitor based multilevel PWM converter may be an attractive choice due to the natural balancing property of the capacitor voltages. Previous research on natural balancing of a 4-level H-bridge Flying Capacitor Converter (FCC) with Phase Shifted (PS) PWM showed slow natural balancing rate for small modulation indices. Theoretical natural balancing time constant becomes infinitely large for...
Recently, LCL filter which is commonly preferred in grid connected inverters has found its common usage in shunt active power filters. LCL filter can suppress the switching harmonic ripples effectively. However, it has resonance problem which results unstable system. The resonance problem can be solved with damping the resonance using passive damping methods. The design of LCL filter with using PD...
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