In order to alleviate this problem, a composite modulation and voltage balancing method is proposed in this paper. 5, phase-disposition PWM (PDPWM) is utilized and the relationship between the neutral-point currents and the reference phase. . Kui Wang, Senior Member, IEEE, Zedong Zheng, Senior Member, IEEE, Lie Xu, Member, IEEE, and Yongdong Li, Senior Member, IEEE Abstract- Four-level neutral-point clamped (NPC) inverter suffers from the neutral-point voltage balancing problem, which equivalent switching frequency, better harmonic. . Low-frequency pulsating ripples exist on the input side of a single-phase inverter, which bring some adverse effects and harm to the inverter and photovoltaic power generation system. In order to suppress the low-frequency pulsating ripple and reduce the filter circuit parameters, a novel. . Abstract: Single-phase uninterruptible power supply (UPS) is widely used in all kinds of important electrical equipment to ensure the smooth implementation of power supply. The core part of the UPS is the inverter circuit, and the control of the output voltage of the inverter circuit is of great. .
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