中国电机工程学报2017，Vol.37Issue(23)：6971-6980,10.DOI:10.13334/j.0258-8013.pcsee.162345
带有源钳位光伏并网逆变器谐波形成机理与抑制方法研究
Research on the Mechanism of Harmonic Generation and Suppressing Methods for Photovoltaic Grid-connected Inverter With Active Clamp Circuit
摘要
Abstract
Active clamp technique has been widely used in photovoltaic grid-connected inverters since it can be used for effectively absorbing the energy in leakage inductor and realizing the zero-voltage-switching of the main switches.However,the harmonics of the grid current increases along with the applying of the active clamp circuit,which will do harm to both the grid and the inverter.This paper took flyback photovoltaic grid-connected inverter with active clamp circuit operating on discontinuous current mode (DCM) as an example to research the harmonics of grid current.Firstly,the waveforms of the flyback inverter with the active clamp circuit in each stage wee given and the mathematical expression of the grid current was established to analyze the mechanism of the grid current harmonic increase.Based on the above analyses,the harmonic suppressing methods were proposed to improve the quality of the grid current.Finally,the theoretical analysis had been verified by simulation and experiment results,which provides a theoretical basis for suppressing the harmonics caused by active clamp circuit in grid-connected inverter.关键词
有源钳位/电能质量/光伏并网逆变器/谐波抑制/反激变换器Key words
active clamp circuit, power quality/photovoltaic grid-connected inverter/harmonic suppressing/flyback converter分类
信息技术与安全科学引用本文复制引用
李虹,房春雪,郝瑞祥,邵天骢,苏文哲..带有源钳位光伏并网逆变器谐波形成机理与抑制方法研究[J].中国电机工程学报,2017,37(23):6971-6980,10.基金项目
国家自然科学基金项目(51577010) （51577010）
中央基本科研业务费(2017JBM054).Project Supported by National Natural Science Foundation of China (51577010) （2017JBM054）
Fundamental Research Funds for the Central Universities (2017JBM054). （2017JBM054）
