摘要
针对LCL并网逆变器加权平均电流控制系统对电网电感变化敏感的问题,提出一种无谐波注入的电网电感测量新方法。通过2次采样并网电流和电容电压计算得出电网的电感。这种电网电感检测方法能够准确检测电网电感值,快速跟踪电网电感变化,系统具有较高的功率因数。通过仿真,验证了该方法的有效性。
The LCL PV grid inverter based on the weighted average current control is sensitive to the variation of the grid inductance,a novel method without injecting harmonic waves is adopted in this paper. The inductance is calculated by sampling the capacitance voltage and grid current twice. The simulation shows that this method can test the values of the grid induction accurately,tracke the grid induction quickly,and has a high power factor. Finally the simulation verifes the effectiveness of this method.
出处
《江南大学学报（自然科学版）》
CAS
2015年第5期610-613,共4页
Joural of Jiangnan University (Natural Science Edition)
关键词
加权平均电流控制
并网逆变器
电网电感
weighted average current control
grid inverter
grid inductance
