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多电平变换器能产生多阶梯、低失真电压波形,特别适合于大功率高电压场合,具有开关损耗小、效率高、低EMI等优点,且已经在功率因数校正和有源电力滤波器等方面得到了大量的应用。故在介绍多电平原理的基础上,对单相、三相三线制和三相四线制多电平有源电力滤波器的工作原理、控制方法和特点进行介绍。
Multi-level converter can produce multi-ladder, low distortion voltage waveform, especially suitable for high power high voltage occasions, with switching losses, high efficiency, low EMI and other advantages, and has been in the power factor correction and active power filter Has received a lot of applications. Therefore, based on the introduction of multi-level principle, the working principle, control method and characteristics of single-phase, three-phase three-wire and three-phase four wire multi-level active power filter are introduced.