CAJ | 학술논문

为实现光伏发电系统低成本高效率的运行需求，提出了一种双逆变器串联的光伏并网变流器拓扑。通过建立双逆变器串联系统的数学模型，得出了在光伏系统中无共模电压差的调制方法，并基于对2组逆变器有功功率的分析，提出功率均衡的系统控制策略，有效降低光伏系统的初始成本并提升电池板 MPPT 输出电压范围。仿真和实验结果验证了所提拓扑的可行性和控制策略的有效性。
위실현광복발전계통저성본고효솔적운행수구，제출료일충쌍역변기천련적광복병망변류기탁복。통과건립쌍역변기천련계통적수학모형，득출료재광복계통중무공모전압차적조제방법，병기우대2조역변기유공공솔적분석，제출공솔균형적계통공제책략，유효강저광복계통적초시성본병제승전지판 MPPT 수출전압범위。방진화실험결과험증료소제탁복적가행성화공제책략적유효성。
To meet the operational demands on low-cost and high-efficiency for photovoltaic (PV) generation system, a topology of PV grid-connected converter composed of dual inverters connected in series is proposed. A mathematical model for the converter composed of dual inverters connected in series for PV generation system is established and a modulation method, in which the common-mode voltage difference is eliminated, is obtained. Based on the analysis on the active power of two sets of inverters a system control strategy with power equilibrium is put forward to effectively reduce the initial cost of PV generation system and extend the working range of the maximum power point tracking (MPPT) of solar panel. The feasibility of the proposed topology and the effectiveness of the proposed control strategy are validated by both results of simulation and experiments.