Adaptive dc-link voltage control strategy to increase PV inverter lifetime

被引：10
|
作者：
Callegari, J. M. S. [1 ]
Cupertino, A. F. [2 ,3 ]
Ferreira, V. N. [3 ]
Brito, E. M. S. [3 ]
Mendes, V. F. [3 ]
Pereira, H. A. [4 ]
机构：
[1] Fed Ctr Technol Educ Minas Gerais, Grad Program Elect Engn, Belo Horizonte, MG, Brazil
[2] Fed Ctr Technol Educ Minas Gerais, Dept Mat Engn, Belo Horizonte, MG, Brazil
[3] Univ Fed Minas Gerais, Grad Program Elect Engn, Belo Horizonte, MG, Brazil
[4] Univ Fed Vicosa, Dept Elect Engn, Vicosa, MG, Brazil
来源：
MICROELECTRONICS RELIABILITY | 2019年 / 100卷
关键词：
Minimum dc-link voltage; Photovoltaic inverters; Lifetime evaluation; System-level reliability; RELIABILITY;
D O I：
10.1016/j.microrel.2019.113439
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This work proposes an adaptive dc-link voltage strategy applied to a double-stage three-phase grid-connected PV inverter, in order to decrease the power devices and capacitors thermal stress, and increase the system-level reliability as a consequence. The objective is to reduce the dc-link voltage to the minimum value required to inject power into the grid. A system reliability analysis is made based on mission profiles from Brazil. The results show that the proposed technique has a positive impact on the system reliability, increasing the estimated lifetime by 75% when compared to the traditional fixed dc-link voltage strategy.
引用
收藏
页数：7
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