Transformer is the most important part of any transmission system, so it is necessary to have the transformer in proper working order for uninterrupted power supply in the various locations in around the substations. Renewable energy replaces the conventional energy sources at the fast rate in various parts of the world. Due to high penetration of renewable energy, the installed transformers have observational impact on their insulation, leading to degradation of transformer life. This paper presents a case study of Gujarat solar power plant to find the impact of photovoltaic (PV) penetration on transformer performance in the time span of 1 year. A PV plant has various impacts on performance parameters of transformers. The working of on-load tap changer is also affected by the presence of PV. The main cause behind the altered performance of transformer in the presence of solar panel is its associated inverters that are used to supply linear loads. A higher temperature rise will occur in the windings and cores of the transformer due to voltage and current harmonics, resulting in extra losses. This paper presents the cumulative effect of solar plant on the transformer working during a period of 1 year and finds both negative and positive impact on transformer parameters.

中文翻译：

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太阳能电池板对变压器性能的影响：案例研究

变压器是任何输电系统中最重要的部分，因此必须使变压器处于正常工作状态，以保证变电站周围各个位置的不间断供电。可再生能源在世界各地以快速的速度替代传统能源。由于可再生能源的高渗透率，安装的变压器对其绝缘产生观察影响，导致变压器寿命下降。本文介绍了古吉拉特邦太阳能发电厂的案例研究，以找出光伏 (PV) 渗透率在 1 年的时间跨度内对变压器性能的影响。光伏电站对变压器的性能参数有多种影响。PV的存在也会影响有载分接开关的工作。存在太阳能电池板时变压器性能改变的主要原因是其相关的逆变器，用于为线性负载供电。由于电压和电流谐波，变压器的绕组和铁芯会出现较高的温升，从而导致额外的损耗。本文介绍了太阳能发电厂对变压器在 1 年内工作的累积影响，并发现对变压器参数的负面和正面影响。