Impact of inverter configuration on energy cost of grid-connected photovoltaic systems

被引：28
作者：
He, Fanbo [1 ,2 ]
Zhao, Zhengming [1 ,2 ]
Yuan, Liqiang [1 ,2 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
[2] State Key Lab Control & Simulat Power Syst & Gene, Beijing, Peoples R China
来源：
RENEWABLE ENERGY | 2012年 / 41卷
基金：
中国国家自然科学基金;
关键词：
Cost; Parallel; Photovoltaic systems; Reliability; System configuration; Yield estimation;
D O I：
10.1016/j.renene.2011.11.030
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This paper proposes a method to evaluate and optimize inverter configurations for grid-connected PV systems. It is studied by Monte-Carlo analysis that how the inverter configuration and its operation strategy would impact on lifetime energy yield and the levelized cost of energy (LCOE) considering the PV array scale, environmental conditions, system cost, inverter efficiency and reliability. The efficiency characteristic of parallel inverters with a common DC bus is deliberated along with the optimal operation strategy. Inverter system performance ratio (ISPR) is proposed as an overall index of lifetime energy conversion efficiency. A case study is performed to demonstrate the proposed method. It shows that the configuration with a common DC bus is a potential solution to reduce the energy cost of PV power generation systems. As ancillary results, it is found that optimizing the PV panel orientation can improve the probability distribution of solar irradiance on the panel, and it is confirmed that an oversized PV array may help reduce the energy cost. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：328 / 335
页数：8
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