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This paper proposed a new AC signal detection method based on variable N synchronous sampling to solve the problems on the harmonic detection and analysis of periodic sin waveform in power grid. Comparing with the traditional fixed N synchronous sampling detection in which the number of sampled data is constant in a period, the key difference of the new method is that the period of sampling points...
In this paper, the efficiency of the conventional two-level and three-level grid-connected inverter for the photovoltaic (PV) generation is analyzed. And the DC-link voltagepsilas influence on it is also studied. It can be seen that when the inverter does not control the gridpsilas frequency and voltage, a conventional three-level inverter has higher efficiency than that of a conventional two-level...
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