具有储能功能的双模式光伏逆变器的研究
Dual Mode PV Inverter with Energy Storage Function
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摘要: 具有储能功能的双模式光伏逆变器可在并网、离网两种状态下工作,无论电网正常、异常还是白天、夜晚均可为用户提供电力,应用范围广泛。本文设计了双模式光伏逆变器的硬件和软件,研究了并网、离网两种模式相互切换策略,并研制了样机,实验结果表明样机实现了两种模式平滑切换,效率高,电压畸变率低。Abstract: The dual mode photovoltaic power generation with energy storage function has grid-connected mode and off-grid mode. It can provide energy for users no matter what the grid is normal or abnormal, or no matter what it is during day or night. So it has been widely used. The hardware and software of the dual mode photovoltaic inverter are designed in the paper, and the switching strategies between the two modes are studied, the prototype is developed and simulation model is built. The results of simulation and experiment show that the prototype has realized the smooth transition between the two modes and it has high efficiency and low voltage distortion rate.