This paper proposes a family of novel enhanced-boost quasi-Z-source inverters (EB-qZSIs). For the similar input voltage and shoot-through duty ratio, to that Z-source inverter/enhanced-boost qZSIs, presented topologies provide very high boost at modulation index with improved quality output waveform. Compared EB-ZSI EB-qZSIs, these less capacitors stress, which reduce volume cost system. Akin t...

To reduce the pressure on contacts and circuit breaker and realize the zone selective interlocking (ZSI) function above the instantaneous protection threshold (e.g., >10In), the short circuit current needs to be early detected. The state-of–art of early short circuit detection (ESCD) method is reviewed. Based on the equivalent model of the short circuit, a new method based on the current and it...

Abstract This paper presents a comparison between PV system using Z source inverters and Quazi Z source inverters. The Z-source inverter employs a unique LC network to couple the inverter power circuit to the diode front end and can be shoot through to boost the DC link voltage. By controlling the shoot-through duty cycle, the PV array output voltage is controlled and the maximum power point tr...

Abstract In this paper, there is a discussion about different modulation schemes for dc-to-ac ZSC, also named Z-source inverter (ZSI), triggering the main switches of three-phase legs or poles an inverter. A prototype 8.5-kilowatt wind turbine with 5.8-kilowatt Permanent Magnet Synchronous Generator (PMSG) system employed voltage-controlled ZSI implemented in paper. For voltage control load sid...

The use of green energy to power ships in the marine industry has attracted increasing attention recent years. This paper presents an inland river cruise ship supplied by a fuel cell (FC) as main source and supercapacitor (SC) auxiliary source. Its propulsion inverter adopts proposed high-boost Z-source inverter, high-voltage-boost (HVB-ZSI) principle is studied. advantages this HVB-ZSI two cas...

The impedance networks increment the input DC voltage of the voltage source inverters. Their advantage is lack of the additional switches – they use only inverter bridge switches. However they cause some side effects in the inverter operation. Up today the tips how to design Z-Source impedance network keeping it in the Current Continuous Mode are rare in the literature. The paper present proble...