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Determining the start and end of the voltage sag event is very important for sag analysis and mitigation. There are several detection methods for voltage sags in which sag voltages are usually expressed in the terms of RMS. The RMS method represents one cycle historical average value, not instantaneous value which may lead to long detection time when voltage sag has occurred. This paper will proposed...
In this paper, a novel single-phase five-level inverter only using five power switches is presented to alleviate harmonic components of the output voltage. The derivation of the topology and its modulation methods are analyzed in the paper. In AC system, nonlinear loads are major sources of total harmonic distortion (THD), so the repetitive control system is given to keep the output voltage being...
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