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Multilevel topology and selective harmonic compensation (SHC) can control active power, reactive power, and to provide ancillary functions to support the grid. However, researchers find that with conventional L or LCL filter, multilevel SHC would act as noise source and inject harmonics to the grid by itself. Moreover, the output current of the multilevel converter is sensitive to the error of the...
One critical drawback of Selective Harmonic Elimination (SHE) and Compensation (SHC) in Cascaded Multilevel Inverter (CMI) topology is that the solution range is very limited and in an irregular shape. As a result, the compensation capacity and system parameters are hard to determine. This paper proposed a voltage phasor diagram to explain the reason of the limited solution range, proposed a four-quadrant...
This paper presents a new design for an ultra-fast, public electric vehicle (EV) charging station. Because of the multi-megawatt nature of such a station, the design is aimed at being appropriate for a medium voltage (MV) connection. Through the proper choice of a multi-level topology and staircase modulation, it is able to operate efficiently and provide galvanic isolation without the use of a large...
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