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This paper compares a Five-Level Neutral Point Clamped Voltage Source Converter (5L-NPC VSC), a Five-Level Series Connected H-Bridge Voltage Source Converter (5L-SCHB VSC), and a new Five-Level Auxiliary Series Connected H-Bridge Voltage Source Converter (5L-ASCHB VSC) on the basis of the state-of-the-art 3.3kV, and 1.7kV IGBTs for a 2.3kV Medium Voltage Converter (MVC). To derive specific converter...
Active Front-End (AFE) converter operation produces electrically noisy DC bus on common mode basis. This results in higher ground current as compared to three phase diode bridge rectifier. Filter topologies for DC bus have to deal problems with switching frequency and harmonic currents. The proposed filter approach reduces common mode voltage and circulates third harmonic current within the system,...
The industrial electronics market is continuously changing following the users demand. This paper introduces the current industrial electronics applications and is focused in the medium-voltage high-power ones. The multilevel approach is the most attractive solution to achieve the challenges that medium voltage-high power applications arise. Several commercial examples are introduced and some of the...
The increasing demand of energy and proliferation of non-linear loads have leaded to the appearance of new grid codes which limit the maximum acceptable harmonic levels. In this context, multilevel topologies are very attractive because can generate output waveforms with a low harmonic content using a low switching frequency. In this paper, the recently presented selective harmonic mitigation technique...
As a new multilevel converter topology, active NPC (ANPC) converter is very competitive for utility interface of large wind turbines. To meet the harmonics limit according to standards, such as IEEE, VEDW and IEC, passive grid filter is usually required, which is bulky, heavy, and may cause parasitic resonance in the mains. This paper proposes a new 9-level ANPC converter topology to achieve filterless...
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