摘要
在光伏发电系统中,受电网的影响,逆变器的瞬时输入功率与瞬时输出功率不平衡,在逆变器的输入侧产生了二次功率扰动。文中提出了一种带有薄膜电容的新型功率解耦结构。使其并联在反激式逆变器的输入侧,通过薄膜电容的充放电,使二次功率扰动转移到薄膜电容之中。薄膜电容具有容值小,体积小,寿命长等诸多优点,可以代替传统的体积大、寿命短的电解电容,在滤除二次功率扰动的同时延长系统的寿命。最后通过Psim仿真和实验验证了其可行性。
In the photovoltaic power generation system, due to the influence of power grid, the instantaneous input power and instantaneous output power of the inverter are unbalanced, resulting in secondary power disturbances on the input side of the inverter. A novel power decoupling structure with film capacitance is proposed in this paper. It is parallel to the input side of the fly-back inverter, and the secondary power disturbance is transferred to the film capacitance through the charge and discharge of the film capacitor. The film capacitors have many advantages, such as small capacitance, small volume, and long life and so on. It can replace the traditional electrolytic capacitors with large volume and short life. It also can filter out secondary power disturbances and prolong the life of the system. The feasibility is verified by Psim simulation and experiment.
作者
李正明
曹丹华
张家浚
王彬羽
Li Zhengming;Cao Danhua;Zhang Jiajun;Wang Binyu(School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China)
出处
《电测与仪表》
北大核心
2019年第5期20-25,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51477070)
江苏高校优势学科建设工程资助项目(PAPD(20116))
关键词
二次功率扰动
反激式逆变器
功率解耦
薄膜电容
secondary power disturbances
fly-back inverter
power decoupling
film capacitor
