一种新型双变流器UPS电路结构及其控制策略

A New Type of UPS Circuit Structure with Dual-inverter and Its Control Strategy

  • 摘要: 文章介绍了一种新型串并联双变流器单相UPS电源系统的电路结构、工作原理和控制策略。该UPS电源系统在电网停电逆变模式下2个变流器同时协调工作,并联变流器工作在50 Hz低频脉冲波开关状态,其产生的谐波由工作在高频PWM状态的串联变流器补偿,系统的输出波形仍为正弦波,系统整体效率有所提高。仿真研究证明了该方案的可行性。

     

    Abstract: The paper introduced circuit structure,working principle and control strategy of a new type of single-phase UPS system with series-parallel dual-inverter. The two inverters of the UPS system could work in coordination with each other in inverted mode when power net was cut, and the parallel inverter runs in on off state of 50 Hz pulse wave, its harmonic was compensated by the series inverter which runs in high frequency PWM state. The output wave of the UPS system was still in sine wave,and the efficency of the UPS system was improved. The simulation research proved the feasibility of this scheme.

     

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