An algorithm of dead beat current control is proposed considering time delays,the mathematical expression of inductance current is deduced in the two beat period of single-phase Boost power factor correction (PFC) converter,then the switch duty cycle control signal is got.Grid current track the grid voltage quickly and accurately is reaized,the total harmonic distortion (THD) of grid current reduced effectively.In addition,the phase-locked loop (PLL)based on second order generalized integrator(SOGI)is verified,application of this PLL can realize unit power factor in grid side.Simulation and experimental tests are conducted to demonstrate great performance of the methods above,meeting the operation requirement.%提出一种考虑时间延时的无差拍电流控制算法,推导出单相Boost型功率因数校正(PFC)变换器在两拍周期内电感电流的数学表达式,进而得到开关器件的占空比控制信号.该方案实现了电网电流快速准确地跟踪电网电压,有效减小了网侧电流总谐波畸变率(THD).还验证了基于广义二阶积分器(SOGI)的锁相环(PLL),应用该PLL可实现网侧单位功率因数.仿真和实验均证明了上述方法性能良好,可满足运行要求.
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