摘要
由Boost电路和DC/AC电路组成的两级并网逆变器会在直流母线电容上产生高低频纹波,过大的纹波电压会导致输出电压畸变,而过大的纹波电流会导致电容发热,缩短使用寿命。文章针对某3 kW单相光伏并网逆变器,提出了一种纹波电压和纹波电流综合分析整治方法,依此来指导母线电容参数的选取和抑制纹波幅值。样机试验结果说明了分析方法的正确性。
Two-step single-phase grid-connected inverter consists of boost circuit and DC/AC cir- cuit, which will generate high and low frequency ripple in DC-link capacitance easily, and oversize ripple voltage will make output voltage distortion, oversize ripple current will decrease lifespan of capacitance because of heat production. Aiming at a 3kW single-phase grid-connected inverter, a new theory is proposed to analyze ripple voltage and current and to determine capacitance parame- ters in this paper. In addition, the theory is effective in ripple suppression. Experimental results are compared in terms of ripple amplitude.
出处
《可再生能源》
CAS
北大核心
2014年第10期1448-1452,共5页
Renewable Energy Resources
基金
广东省粤港招标项目(2011BZ100101)
广州市重大科技专项(2010U1-D00231)
中国科学院佛山市合作项目(2012HY1006551)
关键词
并网逆变器
母线电容
纹波电压
纹波电流
single-phase grid-connected inverter
DC-link capacitance
ripple voltage
ripple current
作者简介
戴志威（1991-），男，硕士研究生，研究方向为新能源发电中的电力电子与控制。E—mail：daizhiwei0723@126．com
