摘要
详细介绍了100kVA单级式三相光伏并网发电系统的主电路结构及其工作原理。为实现系统可靠高效运行,在三相逆变器数学模型基础上,采用同步PI电流控制技术完成并网逆变器无静差调节和最大功率跟踪(MPPT)。针对分布式发电系统中特有的孤岛效应,采用了检测盲区小且无谐波引入的主动有功干扰法对孤岛进行检测。试验结果表明了上述方法在光伏并网发电系统中应用的可行性和可靠性。
The main circuit structure and principle of a single-stage three-phase grid-connected PV system is described.In order to achieve reliable and efficient operation,synchronous PI control technology is used based on the three-phase inverter mathematical model to realize non-static discrepancy adjustment and maximum power tracking.As for island effect of the distributed generation system, active power disturbing method is applied to the island detection for the superiorities of small blind spot and non-meritorious harmonic interfere.The results show that the above-mentioned methods in the grid- connected PV system are feasible and reliable.
出处
《电力电子技术》
CSCD
北大核心
2009年第10期39-41,共3页
Power Electronics
关键词
太阳能发电
逆变器/光伏并网系统
孤岛
有功干扰
solar power generation
inverter / grid-connected photovohaic system
island
active power disturbing
