作　　者： ; ; ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《可再生能源》 2012年第11期24-29,共6页

摘　　要： 准确检测光伏并网逆变器电参数,既可提高逆变器的控制速度和精度,又可在过流、过压、欠压等情况下迅速关断开关管,保护逆变器并提高其安全性。文章根据光伏并网逆变器对电参数的检测要求,以DSP芯片TMS320F2808为核心,由线性光耦HCNR201、霍尔电流电压传感器等器件构成检测电路、保护电路,设计了单相光伏并网逆变器电参数检测系统,并在1.5 kW高频隔离型光伏并网逆变器上应用。试验结果验证了该检测系统的可行性和可靠性。 An accurate detection of grid-connected photovoltaic inverter electrical parameter can both improve the control rate and accuracy,and turn off the switchings fast when overcurrent,overvoltage and undervoltage occur to improve the safety of inverter.According to the electrical parameter detection requirement of grid-connected photovoltaic inverter,an electrical parameter detection system,which uses digital signal processor TMS320F2808 as the core is designed.The system adopts high linearity optocoupler HCNR201,Hall current and voltage sensor and other devices to compose the detection circuits and protection circuits.The system is applied on a 1.5 kW high frequency isolated grid-connected photovoltaic inverter.The results of experiment show the feasibility and reliability of the system.

关 键 词： 单相光伏并网逆变器 电参数检测 过流保护 过压欠压保护

领　　域： [电气工程]