CAJ | 학술논문

在分析共直流母线并网系统的基础上，研究并设计一种直流模块式光伏并网控制系统，采用前级共直流母线的直流并联模块，后级集中并网逆变的结构，提高系统可靠性及灵活性，减小功率器件应力，增强系统冗余性，重点介绍了并网逆变控制器的数学模型及相应控制器设计方法。最后，设计一台实验样机进行实验研究，实验结果验证了方案的可行性及控制器设计方法的正确性。
재분석공직류모선병망계통적기출상，연구병설계일충직류모괴식광복병망공제계통，채용전급공직류모선적직류병련모괴，후급집중병망역변적결구，제고계통가고성급령활성，감소공솔기건응력，증강계통용여성，중점개소료병망역변공제기적수학모형급상응공제기설계방법。최후，설계일태실험양궤진행실험연구，실험결과험증료방안적가행성급공제기설계방법적정학성。
In this paper, a DC?modular photovoltaic grid?connected control system has been researched and de?signed, which is based on a common DC bus grid system. A structure about dc module of the common dc bus in the former stage and centralized grid?connected inverter in the later stage is adopted in the system. The reliability and flexibility of the system can be improved, and the stress of power devices can be reduced, moreover, the redundan?cy of the system can be enhanced by this structure. The mathematical model and the corresponding design method of the grid?connected inverter are introduced in detail in this paper. Finally, an experimental prototype is designed for test, and the experimental results verify the feasibility and correctness of the controller design method.