Inverter Control, And Its Parallel Technology

With the development of the information technology, the requirements for the power supply get improved. It should be have good quality and high stability. In this paper, the research is focused on the digital control of the DC-AC inverter and the strategy of inverters parallel.In the first section, the technology of SPWM is discussed. And present a digital control strategy for the inverter based on inductance current and output voltage. In this section, the effect of dead time and the flux imbalance is also discussed.In the second section, the strategy of the inverters parallel is discussed. And a parallel strategy based on distributed control is put forward. The phase locked technology is also discussed in this section.Based on the above discussion, a 25Hz AC power supply for railway communication is realized.Finally, the paper discussed the future of the digital control of the inverter and the parallel technology.