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The international standardization community is currently reviewing the harmonic distortion limits in the frequency range 2 to 150 kHz, referred to as supraharmonics. Power electronics has emerged as a ubiquitous technology, which also plays a critical role in this subject. Broadly speaking, the reduction of emission in the lower-frequency ranges appears to result in an increase in supraharmonic emission...
MULTILEVEL converters compare with the conventional two-level converters provide noticeable advantages such as lower harmonic distortion, lower switching frequency, lower switching losses, and lower stress across the semiconductor switches. To improve the output quality of multilevel converters, different modulation techniques have been suggested in the literature. The most suitable modulation technique...
Active power filters create sideband harmonics over a wide frequency range around the multiple carrier-frequency harmonics, and these can encroach into the low frequency range. This issue is particularly critical when low carrier–fundamental frequency ratios are used such as in aerospace applications, where high fundamental frequencies exist. A three-phase multilevel active shunt filter with a low...
Multilevel converters feature a staircase output voltage, resulting in a lower number of switching operations and better spectral characteristics. Switching every element only once a load cycle (fundamental frequency switching), losses can be minimized. By calculating optimum switching angles, the emergence of lower harmonics can be avoided. Derived from conventional space vector modulation (SVPWM),...
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