Research On Single-phase On-line UPS Power Supply Of Space Vector Pulse Width Modulation

Uninterruptible power supply, is the rectifie、inverter and energy storage sectors as the core component,can be still able to provide a constant voltage、constant frequency、continuous sine wave AC, while power circuit appears failed. Therefore,it is used widely in the medical、financial、communications、industrial control and other areas of application.It brings much convenience to daily life,but also cuts down the loss caused by power failure.However,due to the UPS still has a lot of flaws now, the input rectifier link of traditional UPS will bring pollution and low energy utilization for the grid,this paper studies on the active power factor correction,solves the low utilization rate cased by the voltage and current out of phase,and simulates the boost-type active power circuit by Matlab software,gives out the simulation waveforms.The results validate the active power factor correction can reduce pollution,improvw energy efficiency. Then, the traditional UPS has indepandent boost and buck-type conversion circuit in the battery and the inverter link, which causes circuit structure is complicated and costly, this paper conductes a study of the bidirectional DC/DC conversion, simplifing the circuit,reducing system volume. At last, because of the control algorithm is still fuzzy, the paper studies on the energy-efficient space vector algorithm, using ARM microcontroller as a controller and the vector algorithm as the control strategy, and the algorithm is used to the single-phase UPS power supply to solve a series of problems due to temperature drift of the original discrete components caused, making the the whole system to a digital development. At the end of the chapter, it uses the Matlab software to realize the space vector algorithm, giving out the overall block diagram of the experimental and experimental output waveform.Finally, according to the hardware and soft processer of the digital controlling system for UPS, it designs single-phase on-line UPS based on ATM32F103ZET6,and gives out the flow char and some subroutions.