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This paper presents an improved asymmetric space vector modulation (ASVM) for two level voltage source converters (VSCs) when the switching frequency is only 9 times of line frequency. By adding two pulses in each line cycle when the fundamental voltage crosses zero, the total harmonic distortion (THD) of output current can be reduced significantly with very limited penalty. The applications of improved...
This paper compares AC and DC transmission schemes for power delivery between land-based and off-shore installations. The comparison is focused on the loss, as well as on the technologies needed for each of these systems. The study shows that both AC and DC schemes can provide feasible solutions for off-shore applications. Specifically, it is shown through analysis and simulation, that DC distribution...
This paper presents a comprehensive analysis studying the impact of interleaving on harmonic currents and voltages on AC side of parallel three-phase voltage source converters (VSCs). The analysis performed considers the effects of modulation index and the interleaving angle. Based on the analysis, the impact of interleaving on the design of AC passive components such as AC line inductor and EMI filter...
This paper presents a complete analysis studying the impact of interleaving on harmonic current in DC passive components for paralleled three-phase voltage-source converters (VSCs). The analysis performed considers the effects of modulation index, displacement angle, and the interleaving angle. The results show that the harmonic current in DC capacitor depends strongly on displacement angle, and to...
This paper investigates low-frequency beat and harmonics in grid-connected three-level pulsewidth-modulated (PWM) voltage-source converters with low switching frequencies. The impact of switching frequencies and switching sequence, as well as mitigation techniques, are studied. Different from some recent results, the analysis confirms the advantages of selecting switching frequency, as an odd-triplen...
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