摘要
文章针对屋顶光伏发电及并网设计了DC-DC-AC型双级式的电力变换器,即前级最大功率跟踪电路和后级单位功率因数并网逆变电路,介绍了双级电力变换器的结构与原理,研究了最大功率跟踪与单位功率因数并网问题,提出基于双环MPPT和专家PID控制的系统控制方法,通过仿真和搭建屋顶光伏发电系统实验平台,分别验证了文章方法的有效性和准确性。
A type of DC-DC-AC power converter is researched for photovoltaic power generation sys- tem mounted on building roof. DC-DC circuit, which works as a boost-buck chopper, is connected to grid by the DC-AC converter. Schematic and operating principle of the DC-DC-AC power converter are introduced and discussed. Then a double loop MPPT and an expert PID control strategy are de- signed and applied to promote the efficiency of the proposed system. Results of simulation and experi- ments show that the proposed system can improve the system performance.
出处
《可再生能源》
CAS
北大核心
2015年第10期1470-1477,共8页
Renewable Energy Resources
基金
广东省教育厅高校创新人才项目(2014KQNCX217)
关键词
光伏屋顶
最大功率跟踪
并网逆变器
专家PID控制
photovohaic roof
maximum power point tracking
grid-connected inverter
expertPID control
