无变压器光伏并网逆变器功率损耗分析  

Power Loss Analysis for Transformerless Grid-connected PV Inverter

作　　者：廖志凌[1] 宋中奇[1] 刘国海[1] 

机构地区：[1]江苏大学,电气信息工程学院,江苏镇江212013

出　　处：《电力电子技术》2011年第12期112-113,116,共3页Power Electronics

基　　金：江苏省高校自然科学研究项目(11KJB470005);江苏高校优势学科建设工程资助项目(PAPD)~~

摘　　要：效率已成为衡量光伏并网逆变器的一个重要指标。传统的带隔离变压器的并网逆变器体积大、重量重而且效率低。无变压器的非隔离型并网逆变器以体积小、效率高的优点得到越来越多的研究者关注。由于光照强度的变化,使纹波电流对功率损耗的影响至关重要,但却容易被忽略。此处对一种无变压器并网逆变器工作原理进行了详细的分析,考虑纹波电流,建立了开关损耗和导通损耗的数学模型,最后研制了实验样机。Efficiency is becoming increasingly important in grid-connected photovoltaic inverter design.Traditional grid- connected inverter with isolation transformer is big,heavy,and low efficieney.Transformerless grid-connected inverter attract more and more researchers attention due to its advantages such as small size,low cost and high efficiency.Cur- rent ripple effect is important to power loss analysis due to varying irradiation ,but often be neglected.The design concept to analysis a transformerless grid-connected inverter, establishes a mathematical model of component loss including current ripple effect, and a test prototype is made.

关 键 词：逆变器 并网 无变压器 损耗 

分 类 号：TM464[电气工程—电器]