太阳能光伏并网逆变器设计原文及翻译.docx

Grid-Connected Solar Micro inverter Reference Design Abstract-In traditional grid-connected PV system, it’s hard to remove failure of individual PV panels. This paper presents a Solar PV Grid-Connected Micro-inverter which can be embedded in a single stand-alone photovoltaic panel to solve the problem of single point of failure. For a single photovoltaic panel, rated power of the Micro-inverter is 220W, using the topology of interleaved flyback converter. Keywords-Micro-inverter; interleaved flyback converter; grid-connected; PV panel I. INTRODUCTION With the draining of fossil fuel and increasingly serious pollution caused by traditional power generation methods across the world, renewable and pollution-free energy has gained much attention in economic and political fields. Renewable energy includes photovoltaic (PV) and wind power generation systems. Wide application of renewable energy is now impeded by cost and extensive researches shall be conducted in order to improve cost effectiveness. PV system, also known as solar converter, has gained popularity in recent years as a convenient renewable energy with good prospects. High production cost and low conversion efficiency of silicon solar panel are major defects of PV energy. Cost effectiveness of PV projects will become more reasonable with the application of new PV panel production technology and the improvement of converter efficiency. ??. EVOLUTION OF PV SYSTEM A. Traditional Grid-connected System Traditional grid-connected PV system is comprised of: Urban Home System – multiple solar panels are connected in serial to supply 200-400V DC and output medium power (2-10KW) AC electricity. If certain PV panel in the series loop is damaged (i.e. single point of failure), the entire system will be crashed, i.e. the system is unstable Single Inverter With Multiple DC/DC Converters –multiple PV panels are connected in parallel after DC/DC conversion to input total DC bus bar voltage to inverter and increase output p