Influence of potential induced degradation phenomena on electrical insulating backsheet in photovoltaic modules
Influence of potential induced degradation phenomena on electrical insulating backsheet in photovoltaic modules
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DOI：
10.1016/j.jclepro.2018.10.057
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发表时间：
2019-01
影响因子：
11.1
通讯作者：
Jia-wei Zhang;De-kun Cao;Yan-chen Cui;Fei Wang;C. Putson;Chen Song
中科院分区：
文献类型：
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作者：
Jia-wei Zhang;De-kun Cao;Yan-chen Cui;Fei Wang;C. Putson;Chen Song
由于太阳能电池制造和转换器技术的改进，太阳能光伏（PV）系统已成为最有前途的可再生能源发电方法之一。在PV模块中，聚对苯二甲酸乙二醇酯（PET）通常用作背板以提供电绝缘和物理保护。然而，这样的背板具有各种问题，包括由局部放电（PD）引起的潜在诱导的劣化，其影响PV系统的使用寿命。本文分析比较了PET薄膜的局部放电特性及其引起的绝缘结构退化。将PET预处理并在PD起始电压（PDIV）以上电应力10、30、60和120分钟。利用相分辨局部放电（PRPD）技术，发现放电幅度随放电时间的不同而变化。此外，使用差示扫描量热法（DSC），我们发现，PET的结晶度增加老化时间。本文提出了一个全面的研究背板的电退化，使用PRPD图案和结晶度的变化，这将有助于提高光伏系统的长期使用寿命。
Because of improving solar-cell fabrication and converter technology, solar photovoltaic (PV) systems have emerged as one of the most promising methods of renewable power generation. In PV modules, polyethylene terephthalate (PET) is usually used as a backsheet to provide electrical insulation and physical protection. However, such backsheets have various problems, including potential induced degradation from partial discharge (PD), which affect the service life of the PV system. In this study, the PD discharging characteristics of PET film and its degradation of insulation structure caused by the PD are analyzed and compared. The PET was pretreated and electrically stressed above the PD inception voltage (PDIV) for 10, 30, 60, and 120 min. Using phase-resolved partial discharge (PRPD), we found that the discharge magnitude changed with differing discharge time. In addition, using differential scanning calorimetry (DSC), we found that the crystallinity of the PET increased with aging time. This paper presents a comprehensive study of the electrical degradation of the backsheet, using PRPD patterns and changes in crystallinity, which will help to improve the long-term service life of PV systems.