兆瓦级光伏阵列模拟器的设计和控制研究

Design and Control of Megawatt Photovoltaic Array Simulator

针对光伏阵列的大功率测试需求,提出一种兆瓦级大功率光伏阵列模拟器的设计方案和控制方法。设计采用脉宽调制(PWM)整流和多单元并联Buck-Boost直流变换电路拓扑,通过基于变步长迭代双闭环控制和DC/DC载波移相PWM技术,实现了工作点的快速收敛调节和高质量的波形输出,保证了系统的动、静态特性,满足了网侧高功率因数控制要求。1 MW光伏模拟器样机系统实验说明该设计方案和控制策略可行且有效。

The design and control of a photovoltaic simulator with megawatt capacity is presented.The design adopts pulse width modulation（ PWM ） and multi paralleled Buck-Boost direct current conversion circuit topology.Through variable step iteration dual closed-loop control and DC/DC carrier phase-shifted PWM,it achieves rapid convergence adjustment, high quality waveform output and static and dynamic characteristics, and meets the requirement of high power factor.The feasibility and validity are proved by 1 MW photovoltaic simulator prototype system experiment.