ENERGY EFFICIENCY OF WIND-HYDRO PUMPING STATION SIGNIFICANT POWER

• Date: 2020
• Author Affiliations: P. Vasko — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.; S. Pazych — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.; A. Bryl — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.
• Keywords: keywords
• Main Authors: Vasko, P., Pazych, S., Bryl, A.
• Format: Article
• Language: Ukrainian
• Published: Institute of Renewable Energy National Academy of Sciences of Ukraine 2020
• Subjects: wind turbine; hydraulic pump; dynamics; inertia; flow; synchronous generator; stochasticity.
• Online Access: https://ve.org.ua/index.php/journal/article/view/283
• Journal Title: Vidnovluvana energetika

The development of renewable energy sources in Ukraine is characterized by rapid pace. As of September 2020, the installed capacity of wind station (WPP) and photovoltaic (FPP) stations is about 6 GW, which corresponds to almost 20% of the maximum load of the power system at the current time. Therefore, today the problem of accumulation of stochastic electricity supply of wind farms and power plants in the power system, due to the inconsistency of schedules of generation and consumption of power, is becoming relevant. The idea of using pumped storage hydro station (PSH) to store stochastic energy input of wind farms and power plants is beginning to find its practical implementation. In Spain, a wind-diesel power station has been operating for several years to supply water to the 11 MW PSH battery pool. The experience of operation of this complex has shown a significant reduction in its energy efficiency due to the stochastic nature of wind energy. Therefore, it is time to solve the problem of determining the energy efficiency of the process of converting the kinetic energy of wind into potential energy of water accumulated in the accumulator pool, taking into account the presence of wind speed pulsations. In this work, the energy efficiency of a powerful hydraulic pumping station when powering pump motors from a wind power plant is evaluated, taking into account the pulsations of wind speed and the number of hydroelectric units in the station. The determination of quantitative values of the estimated parameters was based on the results of mathematical modeling of the dynamics of loading modes of operation of the wind pumping station taking into account the stochastic change of wind speed. The mathematical model is a system of nonlinear differential equations that describes the interaction of two inertial components of a single aero-electro-hydro-dynamic system. The rational ratio of the number of hydraulic pumps in the pumping station to achieve the maximum values of the utilization factor of the installed capacity of the wind pumping station is determined. Ref. 29, fig. 6.