摘要
针对光伏组件、热电发电机等新能源发电模块输出电压低的特点,以系统发电功率最大化为控制目标,研究模块串联分布式新能源发电系统中的高能效模块集成变换器拓扑及其控制策略。分析不同变换器类型对系统性能和发电设备输出特性的影响;综合考虑变换器变换效率和最大功率跟踪效率,提出引入直通工作模式实现变换器全电压范围最大功率输出的控制策略和实现方法;并提出具有直通模式的改进型升降压变换器拓扑,详细分析工作模式和设计实现。搭建由13个250W模块组成的串联分布式实验系统,验证了理论分析的正确性。
The renewable power module,such as the thermoelectric generator and PV panel,features low output voltage and low power.Aiming at maximum output power,a high energy efficiency module-integrated-converter（MIC） and its control strategy for series connected distributed（SCD） renewable power system were proposed.The system structure and characteristics of the SCD renewable power system were analyzed in detail.The influence of the MIC’s topologies on the renewable source and SCD power system was presented.Considering both the conversion efficiency and maximum power point tracking efficiency of the MIC,by employing a direct-connection mode,maximum output power over full output voltage range of the MIC was achieved.A high efficiency,high reliable MIC for SCD photovoltaic gridconnected power system was proposed and analyzed in detail.A SCD power system composed of 13 250W modules were built and tested.Experimental results were given to verify the analysis.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第33期1-6,168,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(51177070)
江苏省科技成果转化基金(BA2008001)~~
关键词
分布式能源系统
模块集成变换器
新能源发电系统
升降压变换器
高能效
distributed power system
module integrated converter
renewable power system
Buck-Boost converter
high energy efficiency
