中文摘要：

提出一种单相脉宽调制（PWM）整流器和Buck电路组合的主电路拓扑结构。单相PWM整流器采用无差拍电流控制,使光伏模拟器能快速准确地跟踪给定电流信号且提高网侧功率因数。光伏模拟器利用太阳能电池工程数学模型,可反映光照强度和温度变化对实际I-U特性曲线的影响。根据数字信号处理器（dSP）计算特点及各种模拟器曲线生成方法的优缺点比较,提出了查表法与计算法相结合的方法,可以准确模拟各种情况下光伏阵列的输出特性。实验结果证明了所提拓扑结构和控制方法的可行性和理论分析的正确性。

英文摘要：

A main circuit topology is proposed which based on a single-phase pulse width modulation （PWM） rectifier and a Buck circuit.Single-phase PWM rectifier uses deadbeat current control strategy which can quickly and accurately track the given current signal and improve the power factor near the grid.The photovoltaic emulator used photovoltaic engineering mathematical model that can reflect the actual impact of the I-U characteristic curve of irradiance and temperature.According to the features of digital signal processor（DSP） and the comparison of advantages and disadvantages of different curve calculation methods, a method is presented to combine look-up table and calculation method can simulate the output characteristics of the photovohaic array under various circumstances accurately.Simulation and experimental results proved the feasibility of the mentioned methods and validity of the theoretical analysis.