Document Type : Research article
Authors
1 Department of Electrical Engineering, Dariun Branch, Islamic Azad University, Dariun, Iran
2 Department of Electrical Engineering, Apadana Institute of Higher Education, Shiraz, Iran
Abstract
In recent years, energy storage systems are increasingly used in power systems to store electricity when the generated power is more than the required load. The advantages of the energy storage systems in the power system include improved reliability, energy storage in non-peak times and production in peak times that results in the peak reduction of the power system, storage at times of low electricity prices, and generate at times of high electricity prices, and storage of the surplus production capacity of renewable energy resources such as wind turbines and photovoltaic systems that their production is not controllable. Among different energy storage systems, pumped-storage generation units can be integrated into electricity networks with high-energy storage capacity and no environmental effects. For this purpose, in this research, the adequacy assessment of power systems, including pumped-storage generation units, is studied. At first, the paper develops a reliability model for these energy storage systems considering the failure of composed components, including the motor-generator, pump-turbine, control, protection, and measurement systems, turbine housing, water channel, up and down reservoir, and transformer. To consider the effect of pumped-storage generation plants on the reliability of the power system, the load duration curve of the system is modified. Then, the proposed model is implemented for assessing the adequacy of power systems, considering the effect of generation and transmission networks using an analytical method through the contingency analysis technique. To study the effectiveness of the suggested reliability model, numerical results related to the reliability assessment of RBTS and IEEE-RTS are presented. It is concluded from numerical outcomes that pumped storage power plants can improve the reliability indices of the power systems. By integrating the understudied pumped storage generation unit into RBTS, the system load can increase up to 15 MW.
Highlights
- A reliability model is developed for pumped-storage generation plants considering the failure of composed components.
- For considering the impact of the pumped-storage power plant, the load duration curve related to the power system is modified to model the main function of the pumped-storage generation plant.
- Adequacy assessment of the generation power system including the pumped-storage generation unit is performed to study the impact of these units on the adequacy indices of the power system.
- The impact of transmission systems on the reliability performance of power systems including pumped-storage generation plants is studied.
Keywords
Main Subjects
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