基于PWM整流器无功调节技术的新型光伏模拟器

介绍了一种采用三相电压型PWM整流技术的光伏电池阵列模拟器。通常PWM整流器工作于单位功率因数，因而电网电压限制了直流电压的输出范围。文章通过电网提供无功电流，实现模拟器低压区间的输出，详细分析了无功电流的取值范围，提出了最佳的无功电流选取方法。实验采用一台输出端连接三相电阻的变流器，dSPACE软件控制该变流器实现逆变，以模拟直流可调负载，通过改变负载的功率使模拟器工作在I-V曲线的不同位置，并用ControlDesk监测到了模拟器在不同光照强度下的I-V和P-V特性曲线。实验证明了该模拟器能够输出不同光照强度下的I-V曲线，且具有较宽电压输出范围。

Novel PV Simulator Based on Reactive Power Adjustment of PWM Rectifier

A PV array simulator was presented based on three-phase voltage PWM rectifier. Generally, PWM rectifier works at unity power factor, but the grid limits DC voltage range. Thus reactive current was provided via the grid to realize the simulator output in low voltage range. Furthermore, it analyzed the range of reactive current and proposed optimal methods. A converter connecting a three-phase resistance was used in the experiment, and dSPACE controlled the converter to simulate DC adjustable load, by changing load power to make the simulator work at different places of I-V curve. The ControlDesk monitored the I-V and P-V curves of the simulator at different light intensity. The experiment proves that the simulator can output I-V curve at different light intensity, and has wide voltage range.