摘要
建立了光伏市电互补系统动态分析模型,提出了基于变步长无电压检测的最大功率跟踪控制方法及基于逆止二极管控制直流母线入口的光伏市电互补系统控制策略。与扰动观察法比较,验证了所提出的最大功率跟踪控制方法的有效性。光伏市电互补系统运行的仿真结果验证了模型的有效性及负载电流、电压波动特性。实验结果进一步表明,当太阳辐射量降低时,负载电源由光伏向市电自动切换。在电源切换过程中,负载电压与电流波形畸变率小,系统保持平稳运行。实现了太阳能发电即发即用与就地消纳利用的目的。
Dynamic analysis model of the photovoltaic-grid complementary system is established in this paper.Maximum power point tracking method based on variable step without input-voltage detection and control strategy based on reverse blocking diode control DC bus entrance are proposed.Comparing with the disturbance observation method,the effectiveness of the maximum power point tracking method proposed by this paper is proved.Simulation results of the photovoltaic-grid complementary system verifiy the effectiveness of the model.The fluctuation characteristic of the load current and voltage are tested.Experimental results further show that power supply switch from photovoltaic to grid automatically when solar radiation reduces.In the process of the power switch,distortion rate of the load voltage and current is small and system running smoothly.Realizing the purpose of using photovoltaic generation in real time and in place to dissolve.
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第5期200-207,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51377106
51337001)
辽宁省教育厅科学技术研究项目(L2016lky04)
辽宁科技学院青年科研启动基金项目(Qn201502)资助
关键词
光伏发电系统
最大功率点跟踪
无电压检测
能源互补
Photovoltaic power generation system
maximum power point tracing
without input-voltage detection
energy complementary
