Power Balance Management of an Autonomous Hybrid Energy System Based on the Dual-Energy Storage

Abstract

The urgent task of modern energy is to ensure reliable and efficient power supply to consumers, even those located in remote, far end places. A hybrid energy system with renewable energy sources is a promising way to ensure such a process. A characteristic feature of the modes of such systems, especially with high penetration levels of renewable energy sources, is the presence of ripples in the charge–discharge currents of the batteries used as energy storage devices. Batteries operation with such current fluctuations leads to rapid degradation of its characteristics as well as a reduction in its lifetime. Furthermore, it leads to a decrease in the reliability of the power supply system and an increase in the cost of generated electricity. A significant drawback of hybrid systems built according to well-known standard schemes is the inefficient use of the primary renewable energy, which is especially critical for energy systems located geographically in areas with severe climatic conditions. This article proposes a new construction method and an algorithm for controlling the modes of hybrid energy systems based on a dual-circuit energy storage device, which increases their reliability and energy efficiency. The prominent outcomes of operating modes of a hybrid power plant with a high penetration of renewable sources are presented, which proves that the proposed method of construction and the proposed control algorithm provide reliable and efficient control of the power balance of the hybrid power system in all possible operating conditions. In addition, the overall efficiency of the proposed renewable energy system is increased from 28% to 60% compared to standard hybrid power plants.

Run-of-the-River Hydro-PV Battery Hybrid System as an Energy Supplier for Local Loads

“…The power generated by the SHP can be calculated from the turbine speed and torque. Additionally, the efficiency of the generator and power electronic converter η g should be included in calculations (5). The proposed SHP model allows the very accurate calculation of the efficiency of the generator and inverter in the form of an efficiency map.…”

“…Moreover, the problem of grid stability being affected by fluctuating power from RES strengthens the hydropower position among reliable energy sources, especially for off-grid systems [2]. Hybrid power systems are usually combined with diesel generators owing to the decrease in cost and improve reliability [3][4][5].…”

Hybrid power plant using synchronization controller system to save electricity cost

“…In addition to the problem of a short duration of time to obtain electrical energy, PV power plants need to be installed in a location that can receive sunlight effectively and use a lot of solar cell modules, such as the roof of a building with an appropriate slope [9]- [11]. Building a hybrid energy power plant that uses both renewable and non-renewable energy is required to achieve savings in the usage of electrical energy on a paid electricity network [12], [13]. The problem experienced by large users of electrical energy, such as  ISSN: 2088-8694 industries, government offices, and universities is the high cost of paying for electricity [14].…”

Optimal Regulation of Local Energy System With Renewable Energy Sources

“…Аналіз стану питання. Проблеми балансування потужності у гібридних енергосистемах з ВДЕ (Hybrid Renewable Energy Systems -HRES) розглядаються у багатьох публікаціях, які стосуються інтегрування відновлюваної енергетики [1]. Предметом досліджень зазвичай є оптимальна конфігурація та вибір параметрів відновлюваних джерел і допоміжних акумуляторних систем накопичення енергії (Battery Energy Storage Systems -BESS) [2].…”