RESEARCH ON INFLUENCE OF WIND ELECTRIC STATIONS ON THE OPERATION MODES OF THERMAL POWER PLANTS

• Дата: 2018
• Автори та афіліації: O. Karmazin — Institute of Renewable Energy, NAS of Ukraine
• Ключові слова: keywords
• Автор: Karmazin, O.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2018
• Теми: active power balance; wind power plants; daily load schedule; Integrated Power System of Ukraine; solar power station.
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/180
• Назва журналу: Vidnovluvana energetika

Thanks to state support for the development of renewable energy sources, the installed capacity of solar (SPP) and wind (WPP) power plants in the second quarter of 2018 reached 1552 MW. Generation of electric power of WPP and SPP over the course of the day is inconsistent. For reliable operation of the power system, the generation of active power every hour should be discounted to consumption. In order to balance the active power of the power plant, the power is implemented in accordance with the specified generation schedule. An increase in unprotected power plants (WPP and SPP) requires an increase in power reserve in the grid. Hydroelectric power stations, thermal electric power stations (TPP) or energy storage systems can be used to balance the grid. In Ukraine, the only type of power plant is available in sufficient volume to balance the grid with an increase in the share of RES, which is TPP. The vast majority of TPPs were built in the 60–80s of the last century, and need reconstruction. Given the increase in the number of failures at the TPP with the increase in the number of start-stop units of power units, the possibility of using TPPs to balance the RES requires research. In previous studies of RES work on the example of WPP with other power plants of the Integrated Power System (IPS) of Ukraine, the averaged values of the wind speed were used in the months. Such an approach significantly reduced the volume of calculations but did not allow to take into account most of the modes of WPP operation. In order to assess the impact of RES on the work of the TPP, it is necessary to perform an analysis of daily balance sheets in a given period. At the same time, the generation of WPP should be taken into account on the basis of statistical data of work of existing stations or actual measurements of wind speed. The analysis of power balances for the load levels of the power system in 2012 (the period of stable operation of the IPS of Ukraine) and the different levels of integration of the wind farm (up to 4 GW) confirmed the possibility of using the TPP to balance the RES. An increase of the installed capacity of the wind farm does not increase the number of start-stopping power units of the TPP. To balance the power system without reducing the TPP power units below the technical minimum, it requires a reduction in the power of the wind farm. In order to avoid this, it is necessary to introduce systems of electric energy storage.