摘要
为提高微源逆变器串联型微网的电能质量,文章分析了微源逆变器(micro source inverter,MSI)直流侧电压变化时系统的输出电压特性。首先推导了系统输出电压的双重傅里叶表达式,分析了系统的基波和谐波电压特性,并讨论了各MSI直流侧电压与系统输出电压谐波分量含有率之间的关系;其次研究了微源数目对系统输出电压谐波幅值的影响;最后基于仿真软件进行了串联系统输出电压特性分析。结果表明:微源逆变器直流侧电压变化时系统中谐波分量增加;仿真模型的输出电压特性与理论分析结果相一致,基此表明了理论分析的正确性。
In order to improve the power quality of micro source inverter series micro-grids （SMGs）, theoutput voltage characteristics of source inverter micro （MSI） DC changes are analyzed in this paper. Firstly,double Fourier expression of system output voltage is derived, fundamental and harmonic voltagecharacteristics of the system are analyzed and the relations between output voltage harmonic content ofSMGs and the MSI DC side voltage are discussed. Secondly, the influencing of micro source number onoutput voltage of harmonic amplitude of SMGs is studied. Finally, the output voltage characteristic of seriessystem is analyzed based on simulation software. The simulation results show that the harmonic componentsof MSI DC changes are increased. The characteristics of the output voltage of the simulation model and thetheoretical analysis results are consistent, verifying the correctness of the theoretical analysis.
出处
《电子设计工程》
2017年第4期18-21,26,共5页
Electronic Design Engineering
基金
国家自然科学基金项目(51467010)
甘肃省科技支撑计划项目(1204GKCA003)
关键词
直流侧电压
串联连接
微电网
电压特性
DC voltage
connected in series
micro-grids
voltage characteristic
