CAJ | 학술논문

　　对一个两级式结构光伏发电并网系统进行研究。该系统的前级 Boost 电路采用变步长 MPPT 实现最大功率点跟踪，后级逆变电路通过电压外环、电流内环的双闭环控制方式实现快速电网电压跟踪。利用 MATLAB/Simulink 仿真软件对该系统的变步长最大功率点跟踪方法及并网逆变器的控制策略进行了仿真验证，结果表明所采用的方法及策略是可行的、有效的，满足光伏发电对并网逆变器的要求。
　　대일개량급식결구광복발전병망계통진행연구。해계통적전급 Boost 전로채용변보장 MPPT 실현최대공솔점근종，후급역변전로통과전압외배、전류내배적쌍폐배공제방식실현쾌속전망전압근종。이용 MATLAB/Simulink 방진연건대해계통적변보장최대공솔점근종방법급병망역변기적공제책략진행료방진험증，결과표명소채용적방법급책략시가행적、유효적，만족광복발전대병망역변기적요구。
A grid-connected photovoltaic system is studied, which has a two-level circuit structure of the prime boost circuit for MPPT (maximum power point tracking) with variable step algorithm and the inverse circuit for the system voltage control with a voltage loop and a inner current loop. With MATLAB/simulink software, this paper does a simulation on the variable step MPPT and voltage control strategy of the system, showing that the algorithm and control strategy of the system are feasible and effective as to meet the requirements of the photovoltaic grid-connected inverter.