摘要
随着化石燃料资源的缺乏以及环境污染问题日益严重,分布式发电以经济、环保等优点在各领域得到了广泛应用.然而,分布式发电设备的大规模无序并网,增加了电网系统在规划、运行上的不确定性及复杂性,而微电网技术为合理处理公共电网和分布式发电之间的关系提供了有效解决方案.所设计的系统对微电网技术进行模拟研究,以STC 15芯片为主控制器,三相全桥逆变电路、交流信号检测电路、MOS管驱动电路为主要硬件电路,完成了并网逆变器的设计,解决了如何提高系统整体效率的问题,并对该系统进行了实验验证.实验结果表明,所设计的系统在孤岛模式运行时,输出线电压为24 V,频率为50 Hz,效率为92.3%,负载调整率为1.25%;逆变器并网工作时,负载调整率为0.8%,证实了所设计系统的正确性与合理性.
With the shortage of fossil fuel resources and increasingly serious environmental pollution problems,distributed power generation has been widely used in various fields with the advantages of economy and environmental protection.However,the large-scale disordered grid connection of distributed power generation equipment increases the uncertainty and complexity of the planning and operation of the power grid system,and the microgrid technology provides an effective solution to properly deal with the relationship between the public power grid and distributed power generation.In designed system,the microgrid technology simulation research,with STC15 chip as the main controller,three-phase full bridge inverter circuit,ac signal detection circuit,MOS driver circuit as the main hardware circuit,completed the design of grid-connected inverter,to solve the problem of how to improve the overall efficiency of the system,and the system was verified by experiments.The experimental results show that when the designed system operates in the island mode,the output line voltage is 24 V,the frequency is 50 Hz,the efficiency is 92.3%,and the load adjustment rate is 1.25%.When the inverter is connected to the grid,the load adjustment rate is 0.8%,which proves the correctness and rationality of the designed system.
作者
杜浩浩
李永军
雷雪梅
DU Haohao;LI Yongjun;LEI Xuemei(School of Physics and Electronics,Henan University,Henan Kaifeng475004,China;School of Civil Engineering and Architecture,Henan University,Henan Kaifeng475004,China)
出处
《河南大学学报（自然科学版）》
CAS
2020年第4期451-458,共8页
Journal of Henan University:Natural Science
基金
国家自然科学基金资助项目(U1704130)
关键词
模拟装置
微电网
并网逆变器
高效率
analog device
microgrid
grid-connected inverter
high efficiency
