Beijing Luzhi Science and Tsinghua University have jointly developed an active filter that is about to be put on the market. It is a high-tech power electronic product used for current measurement and injection via an...Beijing Luzhi Science and Tsinghua University have jointly developed an active filter that is about to be put on the market. It is a high-tech power electronic product used for current measurement and injection via analog-digital logical circuit. The filer consists of an active inverter parallel-connected with compensated harmonic load, and controls an offset voltage generated from active filter through real-time measurement of load current waveform, thus making different order harmonic waves null. As a result, the filter smoothes the base-wave （50 Hz/60 Hz） in the waveform and reverses residual waveform. And then it injects the reverse current into a power supply system through controlling IGBT triggering so as to filter harmonic wave, raise power factor and improve filter effect.展开更多
文摘Beijing Luzhi Science and Tsinghua University have jointly developed an active filter that is about to be put on the market. It is a high-tech power electronic product used for current measurement and injection via analog-digital logical circuit. The filer consists of an active inverter parallel-connected with compensated harmonic load, and controls an offset voltage generated from active filter through real-time measurement of load current waveform, thus making different order harmonic waves null. As a result, the filter smoothes the base-wave （50 Hz/60 Hz） in the waveform and reverses residual waveform. And then it injects the reverse current into a power supply system through controlling IGBT triggering so as to filter harmonic wave, raise power factor and improve filter effect.
