Features load capacity assessment of power transformers in the wind power plants

• Date: 2017
• Main Authors: Kazanskiy, S., Pekur, P.
• Format: Article
• Language: Ukrainian
• Published: Institute of Renewable Energy National Academy of Sciences of Ukraine 2017
• Subjects: wind power station; power transformers; load capacity; determining the thermal state
• Online Access: https://ve.org.ua/index.php/journal/article/view/87
• Journal Title: Vidnovluvana energetika

The dynamic increase of the number and installed capacity of wind power plants (WPP) in Ukraine is based on the implementation of state policy which is fostering renewable energy sector. Also, the considerable increase of WPP's total capacity leads to the necessity of additional survey on WPP interconnection to electrical networks of Ukrainian United Power System.Wind current influence on power generated by WPP units was analyzed. Also, it was shown that for assuring of network reliable operation with WPP units it is required to perform additionalsurvey on heat mode operation of power transformers at substations to which shall be connected WPP.The main parameters characterizing the heat condition of power oil transformers are the temperature of the most heated point of winding insulation, as well as heat ageing of winding insulation.The article shows thermal and dynamical 3D-model of power oil transformer and analysis of model results.It was mentioned that the model represents peculiarities of heat condition change in power oil transformer if loading changes. The model allows fixing the temperature of the most heated point of winding insulation and heat ageing of transformer insulation at different WPP operation modes.