Evaluation of DC-link decoupling using electrolytic or polypropylene film capacitors in three-phase grid-connected photovoltaic inverters
Evaluation of DC-link decoupling using electrolytic or polypropylene film capacitors in three-phase grid-connected photovoltaic inverters
复制标题
三相并网光伏逆变器中使用电解电容器或聚丙烯薄膜电容器的直流母线去耦评估
DOI：
10.1109/iecon.2013.6700290
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Pou
中科院分区：
文献类型：
--
作者：
B. Karanayil;V. Agelidis;J. Pou
通过用金属化聚丙烯薄膜电容器替代传统的电解薄膜电容器，可以提高并网三相光伏（PV）逆变器的预期寿命和长期可靠性。本文对三相并网光伏逆变器用最小值金属化聚丙烯薄膜电容器替代电解电容器时的性能进行了详细评估。最小的直流母线电容会导致更大的电压纹波。然而，我们发现这种纹波在逆变器令人满意地运行的可接受限度内。给出了标称电压为 700V 直流的 15 kW 并网逆变器的仿真结果，以及实验室构建的标称电压为 400V 直流的 3.0 kW 系统的实验结果。
The life expectancy and long term reliability of grid-connected three-phase photovoltaic (PV) inverters can be increased by replacing the conventional electrolytic film capacitors by metallized polypropylene film capacitors. This paper presents a detailed evaluation of a three-phase grid-connected PV inverter performance when replacing the electrolytic capacitor with a minimum value of metallized polypropylene film capacitor-one. The minimum dc bus capacitance leads to larger voltage ripples. However, such ripples were found to be within acceptable limits to run the inverter satisfactorily. Simulation results are presented for a 15-kW grid-connected inverter at nominal voltage of 700V dc and experimental results are provided for a 3.0-kW system at a nominal voltage of 400V dc, built in the laboratory.