Alavi Omid, Kaaya Ismail, De Jong Richard, De Ceuninck Ward, Daenen Michaël
IMO-IMOMEC, Hasselt University, Wetenschapspark 1, 3590, Diepenbeek, Belgium.
imec, Kapeldreef 75, 3001, Heverlee, Belgium.
Heliyon. 2024 Feb 3;10(3):e25839. doi: 10.1016/j.heliyon.2024.e25839. eCollection 2024 Feb 15.
This paper provides an evaluation of a 4-kW grid-connected full-bridge PV inverter under three different scenarios to assess its reliability with a fixed PV degradation rate, with a climate-based degradation rate, and without considering PV degradation. The climate-based degradation rates are estimated using a physics-based model that considers the different parameters influencing the PV reliability. Three different locations representing three different climate zones (hot and dry, hot and humid, and moderate climates) have been chosen in this study. The estimated lifetime of the IGBT, the switching device in the PV inverter, varies depending on the location, with the inclusion of fixed and climate-based degradation rates extending the lifespan of the PV inverter in the examined locations. The results demonstrate the significant impact of PV climate-based degradation rates on power electronics' reliability assessment and the importance of considering various factors in predicting device failures. To ensure the PV inverter's lifespan over the desired period in areas with high solar irradiation rates and extremely hot climates, the design parameters should be slightly elevated above the standard value.
本文对一台4千瓦的并网全桥光伏逆变器在三种不同情况下进行了评估，以评估其在固定光伏退化率、基于气候的退化率以及不考虑光伏退化情况下的可靠性。基于气候的退化率是使用一个基于物理的模型估算的，该模型考虑了影响光伏可靠性的不同参数。本研究选择了代表三种不同气候区（炎热干燥、炎热潮湿和温和气候）的三个不同地点。光伏逆变器中的开关器件绝缘栅双极型晶体管（IGBT）的估计寿命因地点而异，纳入固定和基于气候的退化率可延长所考察地点光伏逆变器的使用寿命。结果表明基于光伏气候的退化率对电力电子设备可靠性评估有重大影响，以及在预测设备故障时考虑各种因素的重要性。为确保在高太阳辐射率和极热气候地区光伏逆变器在预期期间的使用寿命，设计参数应略高于标准值。
