摘要
针对光伏并网系统中二次功率扰动的问题,在基于交错并联反激式微逆变器的基础上,提出了一种功率解耦电路拓扑结构。解耦电路以储能和释能两个工作模式工作,使输入功率和输出功率达到瞬时动态的平衡,消除二次功率的扰动。这种拓扑结构能大大地减少解耦电容值,从而只需要较小的电容来代替电解电容,提高了微逆变器的整体寿命。仿真试验验证了该解耦电路和控制策略的正确性和稳定性。
Aiming at the secondary power disturbance in grid-connected photovoltaic system,a power decoupling circuit is proposed based on an interleaved parallel flyback micro-inverter.In order to eliminate the secondary power disturbance,the decoupling circuit works in energy storage mode and energy release mode to keep a dynamic balance between the input power and output power.The decoupling capacitor requires only a small capacitor instead of electrolytic capacitor to improve the whole lifetime of micro-inverter.Finally,simulation results verify the correctness and stability of the decoupling circuit and control strategy.
出处
《可再生能源》
CAS
北大核心
2013年第7期6-10,共5页
Renewable Energy Resources
基金
陕西省国际科技合作重点项目(2012KW-12
2013KW-08)
关键词
反激式微逆变器
二次功率扰动
解耦电容
薄膜电容
flyback-type micro-inverter
secondary power disturbances
decoupling capacitor
film capacitor
