ENSURING BALANCE RELIABILITY OF ELECTRIC POWER SYSTEMS WITH RENEWABLE ENERGY SOURCES

• Дата: 2019
• Автори та афіліації: S. Kazanskiy — National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» 03056, 37 Peremohy Avenue, Kyiv, Ukraine; Y. Mateyenko — National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» 03056, 37 Peremohy Avenue, Kyiv, Ukraine
• Ключові слова: keywords
• Автори: Kazanskiy, S., Mateyenko, Y.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2019
• Теми: electric power system; balance reliability; renewable energy sources; electric energy market.
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/196
• Назва журналу: Vidnovluvana energetika

The definition of operational and balance reliability as two components of the reliability of the operation of electrical power systems (EPS) is given. It was noted that book-based reliability is the ability of an EPS to constantly maintain the balance of active power and ensure the output of the power required by consumers, taking into account the likely outages of the EPS elements. The necessity of ensuring the balance reliability of EPS and energy interconnections as a single control object is shown. At the same time, the balance reliability is an objective characteristic of the state of the generating part of the EPS and the criterion of the probability of limiting the output of power to consumers. The relationship between increasing the number of renewable energy sources and increasing the likelihood of reducing the balance sheet reliability of an EPS with a limitation on the power of generating units or on the capacity of electrical networks is shown. The indicators for determining the reliability of the EPS are given. The sequence of determining the probability of not covering the system load, based on the use of the Markov power generation model, is shown. The technique of a numerical evaluation of indicators of the balance reliability of EPS with renewable energy sources is proposed. We consider the model representation of the load characteristics of a random variable or a random process. A comparative analysis of models in determining the balance of reliability. It is shown that under the conditions of functioning of the electric energy market the probability of breaches of the balance reliability of the EPS increases. A simplified method for estimating the balance reliability for an EPS with a significant amount of renewable energy sources is proposed, which allows estimating the probability of not covering the load over an arbitrary time interval, as well as the power deficit in an EPS. A graphical interpretation of a simplified model of the balance reliability of the EPS is given. Ref. 4, fig. 5.