摘要
新能源光伏发电并网系统中的逆变器、非线性负载以及变压器等器件产生的谐波,会影响电能质量和安全。为了抑制系统中的谐波,使输出电流很好地跟踪并网电压,实现输出电流的稳定性,提出一种带锁相环和电压反馈双电流环的LCL型光伏并网逆变器谐波抑制方法。对逆变器控制系统进行分析,建立数学模型,通过MATLAB/Simulink搭建仿真系统。仿真结果证明:该方法可以有效抑制谐波,提高电能的供电质量,满足新能源光伏并网系统对电流谐波畸变率的要求。
The inverter,nonlinear load,transformer and other devices in the grid-connected photovoltaic power generation system will produce harmonics,which will affect the power quality and safety.In order to suppress the harmonics in the system,make the output current track the grid-connected voltage well and realize the stability of the output current,a LCL grid-connected photovoltaic inverter harmonic suppression method with phase-locked loop and voltage feedback double-current loop is proposed.The inverter control system is analyzed,the mathematical model is established,and the simulation system is built by MATLAB/Simulink.The simulation results show that the method can effectively suppress the harmonic,improve the power supply quality,and meet the requirements of the current harmonic distortion rate of the new energy photovoltaic grid-connected system.
作者
戴华兵
李荣
DAI Huabing;LI Rong(Beijing Vocational College of Agriculture,Beijing 102208,China)
出处
《北京工业职业技术学院学报》
2020年第1期6-10,22,共6页
Journal of Beijing Polytechnic College
基金
北京农业职业学院技术研发与示范推广项目(XY-YF-16-42)
关键词
新能源
电能质量
光伏并网
电压反馈
LCL型
谐波畸变率
new energy
power quality
photovoltaic grid-connected
voltage feedback
LCL type
harmonic distortion rate
