Abstract
This paper presents a novel prototype of resonant DC link with a two-level PWM control scheme and a three-phase voltage-fed PWM inverter with a resonant DC link. This resonant DC link circuit is capable of controlling two-level PWM modes; a clamped supply voltage PWM and zero voltage PWM modes in the DC bus line can operate under the principle of zero voltage and zero current soft-switching. The operating analysis is carried out and a design procedure of this resonant DC link is described on the basis of simulation results. A three-phase voltage-fed inverter and power converter using this unique resonant DC link are analyzed which operate under a new pulse vector modulation scheme and their performances in a utility-interactive power processor for a battery energy storage system (BESS) are evaluated and discussed, including a reactive current compensator and active power filter using this resonant DC link.
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