研究单周期控制及三相并网逆变电路的优化设计问题,将单周期控制方法运用到并网逆变器中,提出了一种基于单周期的逆变控制策略.分析了三相并网逆变器中开关管的动作顺序与电网电压的关系,推导出了开关管的触发脉冲与电网电压之间的逻辑关系,提高了控制性能.实验结果证明将单周期控制策略应用于三相并网逆变器中可以快速地将输出畸变电流校正为正弦电流,并实现输出电流对电网电压的跟踪,达到很好的功率因数校正效果.%By analyzing the working principle of One-Cycle Control (OCC) and three-phase grid-connected inverter circuit,OCC was applied to the grid-connected inverter,and an inverter control strategy based on OCC was proposed.The relationship between the action sequence of the inverter switches and the grid voltages was analyzed,then the logical relationship between trigger pulses and grid voltage were deduced to improve the control performance.The experimental results show that the output current can be quickly corrected to be sinusoidal current,meanwhile,good power factor can be achieved by the proposed OCC strategy.
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