Service life tests for storage batteries used in islanded power systems with renewable energy sources
https://doi.org/10.21285/1814-3520-2021-4-463-477
Abstract
We investigated the service life of storage batteries to provide recommendations on the design of energy storage systems used in islanded energy systems based on renewable power sources. The service life of maintenance-free, sealed lead-acid batteries produced by absorbed glass mat (AGM) technology was determined by endurance tests carried out by repeated charge/discharge cycles according to specified load profiles, implemented at a specialized Chroma Test System station. Three battery load profiles were simulated: one for the standard DC charge/discharge mode, and two for the charge/discharge modes from renewable energy sources. To this end, the actual data obtained from monitoring the operating modes of a wind power plant were used. It was found that the battery service life depends on the intensity of stress factors. Among them, the throughput factor has the most pronounced influence on the battery lifespan. To extend the service life of storage batteries, it is proposed to separate the charge/discharge modes in time. For batteries operated on renewable energy profiles, this approach decreases time intervals between full charges and at low battery levels, which increases the battery service life by 14%. A solution to designing an energy storage system for microgrids was proposed, which consists in the use of a combined double-circuit energy storage unit. An experimental prototype of such a unit with a power of 15 kW was developed. The use of a combined energy storage unit in the microgrid system: increases the battery service life by 20–30% compared to analogues; improves the static and dynamic stability of the local energy system with a response time of no more than 50 ms towards power change; allows a fuel replacement level of at least 25%; reduces the electricity cost by 25–30%.
About the Authors
S. G. Оbukhov
Tomsk Polytechnic University
Russian Federation
Russian Federation
Sergey G. Obukhov, Dr. Sci. (Eng.), Associate Professor, Professor of the Department of Electric Power and Electrical Engineering
30 Lenin Ave., Tomsk 634050
I. А. Plotnikov
Tomsk Polytechnic University
Russian Federation
Russian Federation
Igor A. Plotnikov, Cand. Sci. (Eng.), Associate Professor, Associate Professor of the Department of Electric Power and Electrical Engineering, National Research
30 Lenin Ave., Tomsk 634050
V. G. Маsolov
VDM-tekhnika LLC
Russian Federation
Russian Federation
Vladimir G. Masolov, Cand. Sci. (Eng.), Director General
27/3/206, Pavlovskaya St., Moscow 115093
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Review
For citations:
Оbukhov S.G., Plotnikov I.А., Маsolov V.G. Service life tests for storage batteries used in islanded power systems with renewable energy sources. Proceedings of Irkutsk State Technical University. 2021;25(4):463-477. https://doi.org/10.21285/1814-3520-2021-4-463-477
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