【摘要】 从电压型PWM整流器(VSR)网侧输入正弦电流在过零点处电流脉动量最大特点出发,详细分析了电流过零处一个PWM采样周期内电流脉动量与各开关导通时间、电源频率、系统电感值、电网电压、功率给定及输出直流电压的关系,设计了VSR交流侧电抗器最小值。在Saber仿真平台上进行了仿真实验,得到了不同电感值下系统输出直流电压、输入电流的变化波形,结果验证了该设计方法的正确性和可行性。更多还原

【Abstract】 Considered the current fluctuation of the input sinusoidal current when crossing zero current,a detailed analysis of the switch period is made in a single sampling period of the voltage source PWM rectifier(VSR) whose current is crossing zero current,and the influences of the switch period is analyzed,the frequency of power supply,the system inductance,the grid voltage,the given power supply and the DC reference voltage on the current fluctuation of the input sinusoidal current which is crossing zero current in a single sampling period of the VSR,and the minimum value of the AC reactor of the VSR is determined.After the simulations under different inductance value are done on the Saber simulation platform,different waveforms of system DC output voltage and input current are acquired.The simulation results verify the accuracy and feasibility of the proposed method which is of great value on the engineering application in the design of three-phase reversible VSR.更多还原