摘要
三相并网逆变器产生的直流分量会对逆变器本身和各类用电设备产生不利影响,如何减少直流量注入是光伏并网发电系统中不容回避的难题。本文提出了直流分量控制方案,并针对这一方案实现,设计并详细分析了直流量检测电路。仿真和实验结果均验证了本文提出的直流量抑制技术是有效可行的。
DC component produced by three-phase Grid-connected inverter is bad for inverter itself and all kinds of other electric loads. How to reduce DC component injection is an unavoidable critical issue in the photovoltaic power systems. Control scheme for DC component restraining is presented in this paper. In order to turn the scheme to the reality, DC component detecting circuit is designed and analyzed in detail. Simulation and experiment results verify the effectiveness of the proposed scheme.
关键词
并网逆变器
直流分量
交流波形
检测电路
Grid-Connected Inverter
DC Component
AC Waveform
Detecting Circuit
