电网技术Issue(10)：2712-2718,7.
新型的无隔离变压器单相光伏并网逆变器
A Novel Single-Phase Grid-Connected Photovoltaic Inverter Without Isolation Transformer
吴学智 1尹靖元 1杨捷 1童亦斌1
作者信息
- 1. 北京交通大学 电气工程学院，北京市 海淀区 100044
- 折叠
摘要
Abstract
The topology of a novel single-phase two-stage grid-connected Photovoltaic (PV) inverter without isolation transformer is proposed. The direct connection of PV panels with the zero line of power grid can eliminate the common mode voltage of PV panel to the ground, so the problem of common mode leakage current is solved. In the proposed topology the high-frequency voltage-doubling mode is utilized for the connection of boost converter with grid-connected inverter to avoid the secondary pulsation of neutral point potential existing in three-level grid-connected inverter, thus the demand on the capacity of filter capacitor at DC side is reduced. To implement the astatic control of single-phase grid-connected current, the proportional-resonant (PR) controller is adopted in the grid-connection control to enhance the stability of control system and improve the quality of grid-connected current. Results of simulation and experiments show that the topology of the proposed grid-connected PV inverter is feasible.关键词
光伏并网逆变器/无隔离变压器/中点箝位型三电平/比例谐振控制Key words
grid-connected photovoltaic inverter/without isolation transformer/neutral point clamped three-level/proportional-resonant control分类
信息技术与安全科学引用本文复制引用
吴学智,尹靖元,杨捷,童亦斌..新型的无隔离变压器单相光伏并网逆变器[J].电网技术,2013,(10):2712-2718,7.
