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In recent years many studies have treated the neutral-point voltage regulation problem in the Neutral-Point-Clamped (NPC) converter. Besides, many works have proposed appropriate control strategies for these grid interfacing NPC converters to compensate the problem of load current unbalance and power factor correction. This paper addresses both problems. Therefore, a predictive current control method...
Dead-time is added into traditional pulse width modulation (PWM) control to avoid short circuit of DC link of inverters. The dead-time can cause problems such as voltage loss, increasing the value of total harmonic distortion of the current waveform (THDI) as well as output current distortion at the zero-crossing. To solve these problems, many studies have been made to deal with the dead-time issues...
Doubly-Fed Induction Generators (DFIG) are widely used nowadays in grid-connected Wind Turbine Systems (WTS). The typical control strategy for WTS is the maximum power coefficient tracking method. However, this method limits desirable ancillary services from WTS, such as power quality improvement in the network. Therefore this paper derives the optimal reference power coefficient of the WTS that can...
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