摘要
对双级式光伏并网逆变器控制算法进行研究,主要包括Boost和全桥逆变器电路。Boost的控制算法完成升压控制和最大功率追踪,升压控制采用软充电的策略保证Boost电路能够将母线电压平稳上升到给定水平。逆变器电路的控制应保证顺利并网和电池板发出的功率平稳输送到电网,提出在低功率下适当降低母线电压来降低并网电流的畸变率。最后对所提出的算法进行相应的仿真和实验验证,结果表明提出的双级式并网逆变器算法具有可行性。
The control algorithm for the doublestage photovohaic grid connected inverter was researched, which include boost and full bridge inverter circuit. The algorithm of boost should be completed to boost control and maximum power point tracking, the boost circuit adopts a soft charge strategy to ensure the bus voltage can rise smoothly to a given level. The algorithm of inverter should ensure the stability of grid connected, and the power issued by the panels should be stable transmission to the grid. Otherwise, reduce the bus voltage can effectively reduce the THD of grid current at low power was proposed. Finally, the proposed algorithm was simulated and experimented, the results show that the algorithm of the proposed twostage gridconnected inverter is feasible.
出处
《电气传动》
北大核心
2013年第5期33-36,40,共5页
Electric Drive
关键词
光伏
并网
软充电
最大功率追踪
photovoltaic
grid - connected
soft charging
maximum power point tracking （MPPT）
