河南科技大学学报（自然科学版）2024，Vol.45Issue(3)：96-104,9.DOI:10.15926/j.cnki.issn1672-6871.2024.03.012
LCL并网逆变器滤波参数近似计算方法
Quick Calculation of Filtering Parameters for LCL Grid-connected Inverters
摘要
Abstract
Under the condition of the same high-frequency harmonic attenuation coefficient,the volume and inductance of the LCL-type filter are significantly smaller than that of the L-type,but its constraints have increased and the parameter calculation has become more complicated,which not only takes into account the quality of the grid-connected currents,but also needs to pay attention to the limitations such as inductor current ripple and reactive power at the inverter side.To simplify the calculation process,an approximate calculation method for the filtering parameters of LCL-type grid-connected inverters is proposed based on active damping.Firstly,the topology is analyzed and then the harmonic content of the inverter output voltage is analyzed using simulation software.Secondly,the priorities of the constraints related to the filter design are reordered,the calculation formula is deduced with the resonance ratio as the key parameter,and the total inductance value is quickly calculated with the resonance frequency as the key parameter,and then the limit value of each parameter is synthesized to give a flow chart of the design,and an error analysis is carried out.Finally,a set of parameters is output from the flowchart for simulation and experimental analysis to prove the rationality and effectiveness of the proposed method for calculating the parameters of LCL filtering.关键词
LCL滤波器/并网逆变器/有源阻尼/近似计算方法Key words
LCL filter/grid-connected inverter/active damping/fast calculation method分类
信息技术与安全科学引用本文复制引用
刘光军,高东绪,吴铁洲..LCL并网逆变器滤波参数近似计算方法[J].河南科技大学学报（自然科学版）,2024,45(3):96-104,9.基金项目
国家自然科学基金项目(51677058) （51677058）
湖北工业大学襄阳产业研究院项目(XYYJ2022C01) （XYYJ2022C01）
