摘要
文章研究了光伏发电并入直流电网所需变流设备的拓扑型式,提出了适用的Boost全桥隔离升压拓扑方案,并详细分析了拓扑的工作模态。文章采用等效受控源法对系统进行了小信号动态建模,采用Bode图分析了控制方案的稳定性,研究了系统启动时对电容充电容易造成电感饱和进而损坏的问题,提出利用光伏系统对电容充电的方案,设计了分段阶梯充电的控制方法。最后搭建了10 kW的样机平台,对拓扑方案和控制策略进行了试验验证。文章对研究大容量新能源发电并入高压直流电网以及中、小功率交直流混合电网组网具有重要的参考价值。
The topology of DC grid photovoltaic converter is studied in this paper, a topological scheme is proposed and detailed analysis of the topology work mode is presented. In this paper, the equivalent controlled source method is used to complete a small-signal dynamic modeling, and stability of the control scheme is analyzed using Bode diagram. Finally, a lOkW prototype platform topology programs is built and the control strategies experimentally is verified. This scheme will have important reference value for HVDC grid-connected research of new energy power generation and research of small scale AC-DC hybrid microgrid network.
出处
《可再生能源》
CAS
北大核心
2014年第9期1274-1280,共7页
Renewable Energy Resources
基金
国家科技部"863"项目(2011AA05A106)
